8773 refactoring ProviderAPI for testability, setting up basic unit test framework

9 files changed, 1199 insertions, 36 deletions

diff --git a/app/src/test/java/se/leap/bitmaskclient/TestUtils.java b/app/src/test/java/se/leap/bitmaskclient/TestUtils.java
deleted file mode 100644
index 96b11df6..00000000
--- a/app/src/test/java/se/leap/bitmaskclient/TestUtils.java
+++ /dev/null
@@ -1,26 +0,0 @@
-package se.leap.bitmaskclient;
-
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-
-/**
- * Created by cyberta on 08.10.17.
- */
-
-public class TestUtils {
-
-    public static String getInputAsString(InputStream fileAsInputStream) throws IOException {
-        BufferedReader br = new BufferedReader(new InputStreamReader(fileAsInputStream));
-        StringBuilder sb = new StringBuilder();
-        String line = br.readLine();
-        while (line != null) {
-            sb.append(line);
-            line = br.readLine();
-        }
-
-        return sb.toString();
-    }
-
-}
diff --git a/app/src/test/java/se/leap/bitmaskclient/eip/GatewaysManagerTest.java b/app/src/test/java/se/leap/bitmaskclient/eip/GatewaysManagerTest.java
index ea212480..4726cab7 100644
--- a/app/src/test/java/se/leap/bitmaskclient/eip/GatewaysManagerTest.java
+++ b/app/src/test/java/se/leap/bitmaskclient/eip/GatewaysManagerTest.java
@@ -16,7 +16,7 @@ import java.io.IOException;
 
 import se.leap.bitmaskclient.Constants;
 import se.leap.bitmaskclient.Provider;
-import se.leap.bitmaskclient.TestUtils;
+import se.leap.bitmaskclient.testutils.TestSetupHelper;
 
 import static junit.framework.Assert.assertEquals;
 import static org.mockito.ArgumentMatchers.anyInt;
@@ -61,17 +61,17 @@ public class GatewaysManagerTest {
 
     @Test
     public void testFromEipServiceJson_ignoreDuplicateGateways() throws Exception {
-        String eipServiceJson = TestUtils.getInputAsString(getClass().getClassLoader().getResourceAsStream("eip-service-two-gateways.json"));
+        String eipServiceJson = TestSetupHelper.getInputAsString(getClass().getClassLoader().getResourceAsStream("eip-service-two-gateways.json"));
         gatewaysManager.fromEipServiceJson(new JSONObject(eipServiceJson));
         assertEquals(2, gatewaysManager.size());
-        eipServiceJson = TestUtils.getInputAsString(getClass().getClassLoader().getResourceAsStream("eip-service-one-gateway.json"));
+        eipServiceJson = TestSetupHelper.getInputAsString(getClass().getClassLoader().getResourceAsStream("eip-service-one-gateway.json"));
         gatewaysManager.fromEipServiceJson(new JSONObject(eipServiceJson));
         assertEquals(2, gatewaysManager.size());
     }
 
     @Test
     public void testClearGatewaysAndProfiles_resetGateways() throws Exception {
-        String eipServiceJson = TestUtils.getInputAsString(getClass().getClassLoader().getResourceAsStream("eip-service-two-gateways.json"));
+        String eipServiceJson = TestSetupHelper.getInputAsString(getClass().getClassLoader().getResourceAsStream("eip-service-two-gateways.json"));
         gatewaysManager.fromEipServiceJson(new JSONObject(eipServiceJson));
         assertEquals(2, gatewaysManager.size());
         gatewaysManager.clearGatewaysAndProfiles();
@@ -79,7 +79,7 @@ public class GatewaysManagerTest {
     }
 
     private String getJsonStringFor(String filename) throws IOException {
-        return TestUtils.getInputAsString(getClass().getClassLoader().getResourceAsStream(filename));
+        return TestSetupHelper.getInputAsString(getClass().getClassLoader().getResourceAsStream(filename));
     }
 
 }
\ No newline at end of file
diff --git a/app/src/test/java/se/leap/bitmaskclient/eip/ProviderApiManagerTest.java b/app/src/test/java/se/leap/bitmaskclient/eip/ProviderApiManagerTest.java
new file mode 100644
index 00000000..c39681c4
--- /dev/null
+++ b/app/src/test/java/se/leap/bitmaskclient/eip/ProviderApiManagerTest.java
@@ -0,0 +1,249 @@
+/**
+ * Copyright (c) 2018 LEAP Encryption Access Project and contributers
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package se.leap.bitmaskclient.eip;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.content.res.Resources;
+import android.os.Bundle;
+import android.text.TextUtils;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Answers;
+import org.mockito.Mock;
+import org.powermock.api.mockito.PowerMockito;
+import org.powermock.core.classloader.annotations.PrepareForTest;
+import org.powermock.modules.junit4.PowerMockRunner;
+
+import java.io.IOException;
+import java.security.NoSuchAlgorithmException;
+import java.security.cert.CertificateEncodingException;
+
+import se.leap.bitmaskclient.ConfigHelper;
+import se.leap.bitmaskclient.Provider;
+import se.leap.bitmaskclient.ProviderAPI;
+import se.leap.bitmaskclient.ProviderApiConnector;
+import se.leap.bitmaskclient.ProviderApiManager;
+import se.leap.bitmaskclient.ProviderApiManagerBase;
+import se.leap.bitmaskclient.testutils.MockSharedPreferences;
+
+import static se.leap.bitmaskclient.ProviderAPI.ERRORS;
+import static se.leap.bitmaskclient.ProviderAPI.PROVIDER_NOK;
+import static se.leap.bitmaskclient.ProviderAPI.PROVIDER_OK;
+import static se.leap.bitmaskclient.ProviderAPI.RESULT_KEY;
+import static se.leap.bitmaskclient.testutils.TestSetupHelper.getInputAsString;
+import static se.leap.bitmaskclient.testutils.TestSetupHelper.mockBundle;
+import static se.leap.bitmaskclient.testutils.TestSetupHelper.mockClientGenerator;
+import static se.leap.bitmaskclient.testutils.TestSetupHelper.mockFingerprintForCertificate;
+import static se.leap.bitmaskclient.testutils.TestSetupHelper.mockIntent;
+import static se.leap.bitmaskclient.testutils.TestSetupHelper.mockProviderApiConnector;
+import static se.leap.bitmaskclient.testutils.TestSetupHelper.mockResources;
+import static se.leap.bitmaskclient.testutils.TestSetupHelper.mockResultReceiver;
+import static se.leap.bitmaskclient.testutils.TestSetupHelper.mockTextUtils;
+import static se.leap.bitmaskclient.testutils.answers.BackendAnswerFabric.TestBackendErrorCase.NO_ERROR;
+
+/**
+ * Created by cyberta on 04.01.18.
+ */
+
+@RunWith(PowerMockRunner.class)
+@PrepareForTest({ProviderApiManager.class, TextUtils.class, ConfigHelper.class, ProviderApiConnector.class})
+public class ProviderApiManagerTest {
+
+    private SharedPreferences mockPreferences;
+    @Mock(answer = Answers.RETURNS_DEEP_STUBS)
+    private Resources mockResources;
+    @Mock(answer =  Answers.RETURNS_DEEP_STUBS)
+    private Context mockContext;
+
+    private ProviderApiManager providerApiManager;
+
+    class TestProviderApiServiceCallback implements ProviderApiManagerBase.ProviderApiServiceCallback {
+
+        //Intent expectedIntent;
+        TestProviderApiServiceCallback(/*Intent expectedIntent*/) {
+            //this.expectedIntent = expectedIntent;
+        }
+
+        @Override
+        public void broadcastProgress(Intent intent) {
+            //assertEquals("expected intent: ", expectedIntent, intent);
+        }
+    }
+
+    @Before
+    public void setUp() throws Exception {
+
+        Bundle bundle = mockBundle();
+        PowerMockito.whenNew(Bundle.class).withAnyArguments().thenReturn(bundle);
+        Intent intent = mockIntent();
+        PowerMockito.whenNew(Intent.class).withAnyArguments().thenReturn(intent);
+        mockTextUtils();
+        mockPreferences = new MockSharedPreferences();
+        mockResources = mockResources(getClass().getClassLoader().getResourceAsStream("error_messages.json"));
+    }
+
+
+    @Test
+    public void test_handleIntentSetupProvider_noProviderMainURL() {
+        providerApiManager = new ProviderApiManager(mockPreferences, mockResources, mockClientGenerator(), new TestProviderApiServiceCallback());
+        Bundle expectedResult = mockBundle();
+        expectedResult.putBoolean(RESULT_KEY, false);
+        expectedResult.putString(ERRORS, "{\"errors\":\"It doesn't seem to be a Bitmask provider.\"}");
+
+        Intent provider_API_command = mockIntent();
+        Bundle parameters = mockBundle();
+        parameters.putString(Provider.MAIN_URL, "");
+
+        provider_API_command.setAction(ProviderAPI.SET_UP_PROVIDER);
+        provider_API_command.putExtra(ProviderAPI.PARAMETERS, parameters);
+        provider_API_command.putExtra(ProviderAPI.RECEIVER_KEY, mockResultReceiver(PROVIDER_NOK, expectedResult));
+
+        providerApiManager.handleIntent(provider_API_command);
+    }
+
+    @Test
+    public void test_handleIntentSetupProvider_happyPath_preseededProviderAndCA() throws IOException, CertificateEncodingException, NoSuchAlgorithmException {
+        mockFingerprintForCertificate(" a5244308a1374709a9afce95e3ae47c1b44bc2398c0a70ccbf8b3a8a97f29494");
+        mockProviderApiConnector(NO_ERROR);
+        providerApiManager = new ProviderApiManager(mockPreferences, mockResources, mockClientGenerator(), new TestProviderApiServiceCallback());
+        Bundle expectedResult = mockBundle();
+        expectedResult.putBoolean(RESULT_KEY, true);
+
+        Intent provider_API_command = mockIntent();
+        Bundle parameters = mockBundle();
+        parameters.putString(Provider.MAIN_URL, "https://riseup.net");
+        parameters.putString(Provider.CA_CERT, getInputAsString(getClass().getClassLoader().getResourceAsStream("riseup.net.pem")));
+        parameters.putString(Provider.KEY, getInputAsString(getClass().getClassLoader().getResourceAsStream("riseup.net.json")));
+
+        provider_API_command.setAction(ProviderAPI.SET_UP_PROVIDER);
+        provider_API_command.putExtra(ProviderAPI.PARAMETERS, parameters);
+        provider_API_command.putExtra(ProviderAPI.RECEIVER_KEY, mockResultReceiver(PROVIDER_OK, expectedResult));
+
+        providerApiManager.handleIntent(provider_API_command);
+    }
+
+    @Test
+    public void test_handleIntentSetupProvider_happyPath_no_preseededProviderAndCA() throws IOException, CertificateEncodingException, NoSuchAlgorithmException {
+        mockFingerprintForCertificate("a5244308a1374709a9afce95e3ae47c1b44bc2398c0a70ccbf8b3a8a97f29494");
+        mockProviderApiConnector(NO_ERROR);
+        providerApiManager = new ProviderApiManager(mockPreferences, mockResources, mockClientGenerator(), new TestProviderApiServiceCallback());
+        Bundle expectedResult = mockBundle();
+        expectedResult.putBoolean(RESULT_KEY, true);
+
+        Intent provider_API_command = mockIntent();
+        Bundle parameters = mockBundle();
+        parameters.putString(Provider.MAIN_URL, "https://riseup.net");
+
+        provider_API_command.setAction(ProviderAPI.SET_UP_PROVIDER);
+        provider_API_command.putExtra(ProviderAPI.PARAMETERS, parameters);
+        provider_API_command.putExtra(ProviderAPI.RECEIVER_KEY, mockResultReceiver(PROVIDER_OK, expectedResult));
+
+        providerApiManager.handleIntent(provider_API_command);
+    }
+
+    @Test
+    public void test_handleIntentSetupProvider_happyPath_storedProviderAndCAFromPreviousSetup() throws IOException, CertificateEncodingException, NoSuchAlgorithmException {
+        mockFingerprintForCertificate("a5244308a1374709a9afce95e3ae47c1b44bc2398c0a70ccbf8b3a8a97f29494");
+        mockProviderApiConnector(NO_ERROR);
+        mockPreferences.edit().putString(Provider.KEY + ".riseup.net", getInputAsString(getClass().getClassLoader().getResourceAsStream("riseup.net.json"))).apply();
+        mockPreferences.edit().putString(Provider.CA_CERT + ".riseup.net", getInputAsString(getClass().getClassLoader().getResourceAsStream("riseup.net.pem"))).apply();
+        providerApiManager = new ProviderApiManager(mockPreferences, mockResources, mockClientGenerator(), new TestProviderApiServiceCallback());
+        Bundle expectedResult = mockBundle();
+        expectedResult.putBoolean(RESULT_KEY, true);
+
+        Intent provider_API_command = mockIntent();
+        Bundle parameters = mockBundle();
+        parameters.putString(Provider.MAIN_URL, "https://riseup.net");
+
+        provider_API_command.setAction(ProviderAPI.SET_UP_PROVIDER);
+        provider_API_command.putExtra(ProviderAPI.PARAMETERS, parameters);
+        provider_API_command.putExtra(ProviderAPI.RECEIVER_KEY, mockResultReceiver(PROVIDER_OK, expectedResult));
+
+        providerApiManager.handleIntent(provider_API_command);
+    }
+
+    @Test
+    public void test_handleIntentSetupProvider_preseededProviderAndCA_failedCAPinning() throws IOException, CertificateEncodingException, NoSuchAlgorithmException {
+        mockFingerprintForCertificate(" a5244308a1374709a9afce95e3ae47c1b44bc2398c0a70ccbf8b3a8a97f29495");
+        mockProviderApiConnector(NO_ERROR);
+        providerApiManager = new ProviderApiManager(mockPreferences, mockResources, mockClientGenerator(), new TestProviderApiServiceCallback());
+        Bundle expectedResult = mockBundle();
+        expectedResult.putBoolean(RESULT_KEY, false);
+        expectedResult.putString(ERRORS, "{\"errorId\":\"ERROR_CERTIFICATE_PINNING\",\"errors\":\"Stored provider certificate is corrupted. You can either update Bitmask (recommended) or update the provider certificate using a commercial CA certificate.\"}");
+
+        Intent provider_API_command = mockIntent();
+        Bundle parameters = mockBundle();
+        parameters.putString(Provider.MAIN_URL, "https://riseup.net");
+        parameters.putString(Provider.CA_CERT, getInputAsString(getClass().getClassLoader().getResourceAsStream("riseup.net.pem")));
+        parameters.putString(Provider.KEY, getInputAsString(getClass().getClassLoader().getResourceAsStream("riseup.net.json")));
+
+        provider_API_command.setAction(ProviderAPI.SET_UP_PROVIDER);
+        provider_API_command.putExtra(ProviderAPI.PARAMETERS, parameters);
+        provider_API_command.putExtra(ProviderAPI.RECEIVER_KEY, mockResultReceiver(PROVIDER_NOK, expectedResult));
+
+        providerApiManager.handleIntent(provider_API_command);
+    }
+
+    @Test
+    public void test_handleIntentSetupProvider_no_preseededProviderAndCA_failedPinning() throws IOException, CertificateEncodingException, NoSuchAlgorithmException {
+        mockFingerprintForCertificate("a5244308a1374709a9afce95e3ae47c1b44bc2398c0a70ccbf8b3a8a97f29495");
+        mockProviderApiConnector(NO_ERROR);
+        providerApiManager = new ProviderApiManager(mockPreferences, mockResources, mockClientGenerator(), new TestProviderApiServiceCallback());
+        Bundle expectedResult = mockBundle();
+        expectedResult.putBoolean(RESULT_KEY, false);
+        expectedResult.putString(ERRORS, "{\"errorId\":\"ERROR_CERTIFICATE_PINNING\",\"errors\":\"Stored provider certificate is corrupted. You can either update Bitmask (recommended) or update the provider certificate using a commercial CA certificate.\"}");
+
+        Intent provider_API_command = mockIntent();
+        Bundle parameters = mockBundle();
+        parameters.putString(Provider.MAIN_URL, "https://riseup.net");
+
+        provider_API_command.setAction(ProviderAPI.SET_UP_PROVIDER);
+        provider_API_command.putExtra(ProviderAPI.PARAMETERS, parameters);
+        provider_API_command.putExtra(ProviderAPI.RECEIVER_KEY, mockResultReceiver(PROVIDER_NOK, expectedResult));
+
+        providerApiManager.handleIntent(provider_API_command);
+    }
+
+    @Test
+    public void test_handleIntentSetupProvider_storedProviderAndCAFromPreviousSetup_failedPinning() throws IOException, CertificateEncodingException, NoSuchAlgorithmException {
+        mockFingerprintForCertificate("a5244308a1374709a9afce95e3ae47c1b44bc2398c0a70ccbf8b3a8a97f29495");
+        mockProviderApiConnector(NO_ERROR);
+        mockPreferences.edit().putString(Provider.KEY + ".riseup.net", getInputAsString(getClass().getClassLoader().getResourceAsStream("riseup.net.json"))).apply();
+        mockPreferences.edit().putString(Provider.CA_CERT + ".riseup.net", getInputAsString(getClass().getClassLoader().getResourceAsStream("riseup.net.pem"))).apply();
+        providerApiManager = new ProviderApiManager(mockPreferences, mockResources, mockClientGenerator(), new TestProviderApiServiceCallback());
+        Bundle expectedResult = mockBundle();
+        expectedResult.putBoolean(RESULT_KEY, false);
+        expectedResult.putString(ERRORS, "{\"errorId\":\"ERROR_CERTIFICATE_PINNING\",\"errors\":\"Stored provider certificate is corrupted. You can either update Bitmask (recommended) or update the provider certificate using a commercial CA certificate.\"}");
+
+        Intent provider_API_command = mockIntent();
+        Bundle parameters = mockBundle();
+        parameters.putString(Provider.MAIN_URL, "https://riseup.net");
+
+        provider_API_command.setAction(ProviderAPI.SET_UP_PROVIDER);
+        provider_API_command.putExtra(ProviderAPI.PARAMETERS, parameters);
+        provider_API_command.putExtra(ProviderAPI.RECEIVER_KEY, mockResultReceiver(PROVIDER_NOK, expectedResult));
+
+        providerApiManager.handleIntent(provider_API_command);
+    }
+
+
+}
diff --git a/app/src/test/java/se/leap/bitmaskclient/eip/VpnConfigGeneratorTest.java b/app/src/test/java/se/leap/bitmaskclient/eip/VpnConfigGeneratorTest.java
index 7e60edb9..8c8cdb61 100644
--- a/app/src/test/java/se/leap/bitmaskclient/eip/VpnConfigGeneratorTest.java
+++ b/app/src/test/java/se/leap/bitmaskclient/eip/VpnConfigGeneratorTest.java
@@ -4,7 +4,7 @@ import org.json.JSONObject;
 import org.junit.Before;
 import org.junit.Test;
 
-import se.leap.bitmaskclient.TestUtils;
+import se.leap.bitmaskclient.testutils.TestSetupHelper;
 
 import static junit.framework.Assert.assertTrue;
 
@@ -217,13 +217,13 @@ public class VpnConfigGeneratorTest {
 
     @Before
     public void setUp() throws  Exception {
-        generalConfig = new JSONObject(TestUtils.getInputAsString(getClass().getClassLoader().getResourceAsStream("general_configuration.json")));
-        secrets = new JSONObject(TestUtils.getInputAsString(getClass().getClassLoader().getResourceAsStream("secrets.json")));
+        generalConfig = new JSONObject(TestSetupHelper.getInputAsString(getClass().getClassLoader().getResourceAsStream("general_configuration.json")));
+        secrets = new JSONObject(TestSetupHelper.getInputAsString(getClass().getClassLoader().getResourceAsStream("secrets.json")));
 
     }
     @Test
     public void testGenerate_tcp_udp() throws Exception {
-        gateway = new JSONObject(TestUtils.getInputAsString(getClass().getClassLoader().getResourceAsStream("gateway_tcp_udp.json")));
+        gateway = new JSONObject(TestSetupHelper.getInputAsString(getClass().getClassLoader().getResourceAsStream("gateway_tcp_udp.json")));
         vpnConfigGenerator = new VpnConfigGenerator(generalConfig, secrets, gateway);
 
         String vpnConfig = vpnConfigGenerator.generate();
@@ -232,7 +232,7 @@ public class VpnConfigGeneratorTest {
 
     @Test
     public void testGenerate_udp_tcp() throws Exception {
-        gateway = new JSONObject(TestUtils.getInputAsString(getClass().getClassLoader().getResourceAsStream("gateway_udp_tcp.json")));
+        gateway = new JSONObject(TestSetupHelper.getInputAsString(getClass().getClassLoader().getResourceAsStream("gateway_udp_tcp.json")));
         vpnConfigGenerator = new VpnConfigGenerator(generalConfig, secrets, gateway);
 
         String vpnConfig = vpnConfigGenerator.generate();
diff --git a/app/src/test/java/se/leap/bitmaskclient/testutils/MockSharedPreferences.java b/app/src/test/java/se/leap/bitmaskclient/testutils/MockSharedPreferences.java
new file mode 100644
index 00000000..af35af31
--- /dev/null
+++ b/app/src/test/java/se/leap/bitmaskclient/testutils/MockSharedPreferences.java
@@ -0,0 +1,165 @@
+/**
+ * Copyright (c) 2018 LEAP Encryption Access Project and contributers
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package se.leap.bitmaskclient.testutils;
+
+import android.content.SharedPreferences;
+import android.support.annotation.Nullable;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * Created by cyberta on 09.01.18.
+ */
+
+public class MockSharedPreferences implements SharedPreferences {
+    HashMap<String, String> mockedStringPrefs = new HashMap<>();
+    HashMap<String, Integer> mockedIntPrefs = new HashMap<>();
+    HashMap<String, Boolean> mockedBooleanPrefs = new HashMap<>();
+
+    @Override
+    public Map<String, ?> getAll() {
+        return null;
+    }
+
+    @Nullable
+    @Override
+    public String getString(String key, @Nullable String defValue) {
+        String value = mockedStringPrefs.get(key);
+        return value != null ? value : defValue;
+    }
+
+    @Nullable
+    @Override
+    public Set<String> getStringSet(String key, @Nullable Set<String> defValues) {
+        return null;
+    }
+
+    @Override
+    public int getInt(String key, int defValue) {
+        Integer value = mockedIntPrefs.get(key);
+        return value != null ? value : defValue;
+    }
+
+    @Override
+    public long getLong(String key, long defValue) {
+        return 0;
+    }
+
+    @Override
+    public float getFloat(String key, float defValue) {
+        return 0;
+    }
+
+    @Override
+    public boolean getBoolean(String key, boolean defValue) {
+        Boolean value = mockedBooleanPrefs.get(key);
+        return value != null ? value : defValue;
+    }
+
+    @Override
+    public boolean contains(String key) {
+        return mockedStringPrefs.containsKey(key) ||
+                mockedBooleanPrefs.containsKey(key) ||
+                mockedIntPrefs.containsKey(key);
+    }
+
+    @Override
+    public Editor edit() {
+        return new Editor() {
+            private HashMap<String, String> tempStrings = new HashMap<>(mockedStringPrefs);
+            private HashMap<String, Integer> tempIntegers = new HashMap<>(mockedIntPrefs);
+            private HashMap<String, Boolean> tempBoolean = new HashMap<>(mockedBooleanPrefs);
+
+            @Override
+            public Editor putString(String key, @Nullable String value) {
+                tempStrings.put(key, value);
+                return this;
+            }
+
+            @Override
+            public Editor putStringSet(String key, @Nullable Set<String> values) {
+                return null;
+            }
+
+            @Override
+            public Editor putInt(String key, int value) {
+                tempIntegers.put(key, value);
+                return this;
+            }
+
+            @Override
+            public Editor putLong(String key, long value) {
+                return null;
+            }
+
+            @Override
+            public Editor putFloat(String key, float value) {
+                return null;
+            }
+
+            @Override
+            public Editor putBoolean(String key, boolean value) {
+                tempBoolean.put(key, value);
+                return this;
+            }
+
+            @Override
+            public Editor remove(String key) {
+                tempBoolean.remove(key);
+                tempStrings.remove(key);
+                tempIntegers.remove(key);
+                return this;
+            }
+
+            @Override
+            public Editor clear() {
+                tempBoolean.clear();
+                tempStrings.clear();
+                tempIntegers.clear();
+                return this;
+            }
+
+            @Override
+            public boolean commit() {
+                mockedStringPrefs = new HashMap<>(tempStrings);
+                mockedBooleanPrefs = new HashMap<>(tempBoolean);
+                mockedIntPrefs = new HashMap<>(tempIntegers);
+                return true;
+            }
+
+            @Override
+            public void apply() {
+                mockedStringPrefs = new HashMap<>(tempStrings);
+                mockedBooleanPrefs = new HashMap<>(tempBoolean);
+                mockedIntPrefs = new HashMap<>(tempIntegers);
+            }
+        };
+    }
+
+    @Override
+    public void registerOnSharedPreferenceChangeListener(OnSharedPreferenceChangeListener listener) {
+
+    }
+
+    @Override
+    public void unregisterOnSharedPreferenceChangeListener(OnSharedPreferenceChangeListener listener) {
+
+    }
+}
diff --git a/app/src/test/java/se/leap/bitmaskclient/testutils/TestSetupHelper.java b/app/src/test/java/se/leap/bitmaskclient/testutils/TestSetupHelper.java
new file mode 100644
index 00000000..19d7e13f
--- /dev/null
+++ b/app/src/test/java/se/leap/bitmaskclient/testutils/TestSetupHelper.java
@@ -0,0 +1,443 @@
+/**
+ * Copyright (c) 2018 LEAP Encryption Access Project and contributers
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package se.leap.bitmaskclient.testutils;
+
+import android.content.Intent;
+import android.content.res.Resources;
+import android.os.Bundle;
+import android.os.Parcelable;
+import android.os.ResultReceiver;
+import android.support.annotation.NonNull;
+import android.text.TextUtils;
+import android.util.Pair;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+import org.mockito.ArgumentMatchers;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.security.NoSuchAlgorithmException;
+import java.security.cert.CertificateEncodingException;
+import java.security.cert.X509Certificate;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import okhttp3.OkHttpClient;
+import se.leap.bitmaskclient.ConfigHelper;
+import se.leap.bitmaskclient.OkHttpClientGenerator;
+import se.leap.bitmaskclient.ProviderApiConnector;
+import se.leap.bitmaskclient.R;
+import se.leap.bitmaskclient.testutils.answers.BackendAnswerFabric;
+import se.leap.bitmaskclient.testutils.matchers.BundleMatcher;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThat;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyBoolean;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.ArgumentMatchers.nullable;
+import static org.mockito.Mockito.RETURNS_DEEP_STUBS;
+import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+import static org.powermock.api.mockito.PowerMockito.mockStatic;
+import static se.leap.bitmaskclient.testutils.answers.BackendAnswerFabric.TestBackendErrorCase.ERROR_NO_CONNECTION;
+import static se.leap.bitmaskclient.testutils.answers.BackendAnswerFabric.getAnswerForErrorcase;
+
+/**
+ * Created by cyberta on 08.10.17.
+ */
+
+public class TestSetupHelper {
+
+
+
+    public static String getInputAsString(InputStream fileAsInputStream) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(fileAsInputStream));
+        StringBuilder sb = new StringBuilder();
+        String line = br.readLine();
+        while (line != null) {
+            sb.append(line);
+            line = br.readLine();
+        }
+
+        return sb.toString();
+    }
+
+    @NonNull
+    public static Bundle mockBundle() {
+        final Map<String, Boolean> fakeBooleanBundle = new HashMap<>();
+        final Map<String, String> fakeStringBundle = new HashMap<>();
+        final Map<String, Integer> fakeIntBundle = new HashMap<>();
+        final Map<String, Parcelable> fakeParcelableBundle = new HashMap<>();
+
+        Bundle bundle = mock(Bundle.class);
+
+        //mock String values in Bundle
+        doAnswer(new Answer() {
+            @Override
+            public Object answer(InvocationOnMock invocation) throws Throwable {
+                Object[] arguments = invocation.getArguments();
+                String key = ((String) arguments[0]);
+                String value = ((String) arguments[1]);
+                fakeStringBundle.put(key, value);
+                return null;
+            }
+        }).when(bundle).putString(anyString(), anyString());
+        when(bundle.getString(anyString())).thenAnswer(new Answer<String>() {
+            @Override
+            public String answer(InvocationOnMock invocation) throws Throwable {
+                Object[] arguments = invocation.getArguments();
+                String key = ((String) arguments[0]);
+                return fakeStringBundle.get(key);
+            }
+        });
+
+        //mock Boolean values in Bundle
+        doAnswer(new Answer() {
+            @Override
+            public Object answer(InvocationOnMock invocation) throws Throwable {
+                Object[] arguments = invocation.getArguments();
+                String key = ((String) arguments[0]);
+                Boolean value = ((boolean) arguments[1]);
+                fakeBooleanBundle.put(key, value);
+                return null;
+            }
+        }).when(bundle).putBoolean(anyString(), anyBoolean());
+        when(bundle.getBoolean(anyString())).thenAnswer(new Answer<Boolean>() {
+            @Override
+            public Boolean answer(InvocationOnMock invocation) throws Throwable {
+                Object[] arguments = invocation.getArguments();
+                String key = ((String) arguments[0]);
+                return fakeBooleanBundle.get(key);
+            }
+        });
+
+        //mock Integer values in Bundle
+        doAnswer(new Answer() {
+            @Override
+            public Object answer(InvocationOnMock invocation) throws Throwable {
+                Object[] arguments = invocation.getArguments();
+                String key = ((String) arguments[0]);
+                Integer value = ((int) arguments[1]);
+                fakeIntBundle.put(key, value);
+                return null;
+            }
+        }).when(bundle).putInt(anyString(), anyInt());
+        when(bundle.getInt(anyString())).thenAnswer(new Answer<Integer>() {
+            @Override
+            public Integer answer(InvocationOnMock invocation) throws Throwable {
+                Object[] arguments = invocation.getArguments();
+                String key = ((String) arguments[0]);
+                return fakeIntBundle.get(key);
+            }
+        });
+
+        //mock Parcelable values in Bundle
+        doAnswer(new Answer() {
+            @Override
+            public Object answer(InvocationOnMock invocation) throws Throwable {
+                Object[] arguments = invocation.getArguments();
+                String key = ((String) arguments[0]);
+                Parcelable value = ((Parcelable) arguments[1]);
+                fakeParcelableBundle.put(key, value);
+                return null;
+            }
+        }).when(bundle).putParcelable(anyString(), any(Parcelable.class));
+        when(bundle.getParcelable(anyString())).thenAnswer(new Answer<Parcelable>() {
+            @Override
+            public Parcelable answer(InvocationOnMock invocation) throws Throwable {
+                Object[] arguments = invocation.getArguments();
+                String key = ((String) arguments[0]);
+                return fakeParcelableBundle.get(key);
+            }
+        });
+
+        //mock get
+        when(bundle.get(anyString())).thenAnswer(new Answer<Object>() {
+            @Override
+            public Object answer(InvocationOnMock invocation) throws Throwable {
+                Object[] arguments = invocation.getArguments();
+                String key = ((String) arguments[0]);
+                if (fakeBooleanBundle.containsKey(key)) {
+                    return fakeBooleanBundle.get(key);
+                } else if (fakeIntBundle.containsKey(key)) {
+                    return fakeIntBundle.get(key);
+                } else if (fakeStringBundle.containsKey(key)) {
+                    return fakeStringBundle.get(key);
+                } else {
+                    return fakeParcelableBundle.get(key);
+                }
+            }
+        });
+
+        //mock getKeySet
+       when(bundle.keySet()).thenAnswer(new Answer<Set<String>>() {
+           @Override
+           public Set<String> answer(InvocationOnMock invocation) throws Throwable {
+               //this whole approach as a drawback:
+               //you should not add the same keys for values of different types
+               HashSet<String> keys = new HashSet<String>();
+               keys.addAll(fakeBooleanBundle.keySet());
+               keys.addAll(fakeIntBundle.keySet());
+               keys.addAll(fakeStringBundle.keySet());
+               keys.addAll(fakeParcelableBundle.keySet());
+               return keys;
+           }
+        });
+
+        //mock containsKey
+        when(bundle.containsKey(anyString())).thenAnswer(new Answer<Boolean>() {
+            @Override
+            public Boolean answer(InvocationOnMock invocation) throws Throwable {
+                String key = (String) invocation.getArguments()[0];
+                return fakeBooleanBundle.containsKey(key) ||
+                        fakeStringBundle.containsKey(key) ||
+                        fakeIntBundle.containsKey(key) ||
+                        fakeParcelableBundle.containsKey(key);
+            }
+        });
+
+        return bundle;
+    }
+
+    public static Intent mockIntent() {
+        Intent intent = mock(Intent.class);
+        final String[] action = new String[1];
+        final Map<String, Object> fakeExtras = new HashMap<>();
+        final List<String> categories = new ArrayList<>();
+
+
+        //mock Action in intent
+        doAnswer(new Answer() {
+            @Override
+            public Object answer(InvocationOnMock invocation) throws Throwable {
+                Object[] arguments = invocation.getArguments();
+                action[0] = ((String) arguments[0]);
+                return null;
+            }
+        }).when(intent).setAction(anyString());
+        when(intent.getAction()).thenAnswer(new Answer<String>() {
+            @Override
+            public String answer(InvocationOnMock invocation) throws Throwable {
+                return action[0];
+            }
+        });
+
+        //mock Bundle in intent extras
+        doAnswer(new Answer() {
+            @Override
+            public Object answer(InvocationOnMock invocation) throws Throwable {
+                Object[] arguments = invocation.getArguments();
+                String key = ((String) arguments[0]);
+                Bundle value = ((Bundle) arguments[1]);
+                fakeExtras.put(key, value);
+                return null;
+            }
+        }).when(intent).putExtra(anyString(), any(Bundle.class));
+        when(intent.getBundleExtra(anyString())).thenAnswer(new Answer<Bundle>() {
+            @Override
+            public Bundle answer(InvocationOnMock invocation) throws Throwable {
+                Object[] arguments = invocation.getArguments();
+                String key = ((String) arguments[0]);
+                return (Bundle) fakeExtras.get(key);
+            }
+        });
+
+        //mock Parcelable in intent extras
+        doAnswer(new Answer() {
+            @Override
+            public Object answer(InvocationOnMock invocation) throws Throwable {
+                Object[] arguments = invocation.getArguments();
+                String key = ((String) arguments[0]);
+                Parcelable value = ((Parcelable) arguments[1]);
+                fakeExtras.put(key, value);
+                return null;
+            }
+        }).when(intent).putExtra(anyString(), any(Parcelable.class));
+        when(intent.getParcelableExtra(anyString())).thenAnswer(new Answer<Parcelable>() {
+            @Override
+            public Parcelable answer(InvocationOnMock invocation) throws Throwable {
+                Object[] arguments = invocation.getArguments();
+                String key = ((String) arguments[0]);
+                return (Parcelable) fakeExtras.get(key);
+            }
+        });
+        doAnswer(new Answer() {
+            @Override
+            public Object answer(InvocationOnMock invocation) throws Throwable {
+                Object[] arguments = invocation.getArguments();
+                categories.add(((String) arguments[0]));
+                return null;
+            }
+        }).when(intent).addCategory(anyString());
+
+        when(intent.getCategories()).thenAnswer(new Answer<Set<String>>() {
+            @Override
+            public Set<String> answer(InvocationOnMock invocation) throws Throwable {
+                return new HashSet<>(categories);
+            }
+        });
+
+        return intent;
+    }
+
+    public static void mockTextUtils() {
+        mockStatic(TextUtils.class);
+
+        when(TextUtils.equals(any(CharSequence.class), any(CharSequence.class))).thenAnswer(new Answer<Object>() {
+            @Override
+            public Object answer(InvocationOnMock invocation) throws Throwable {
+                CharSequence a = (CharSequence) invocation.getArguments()[0];
+                CharSequence b = (CharSequence) invocation.getArguments()[1];
+                if (a == b) return true;
+                int length;
+                if (a != null && b != null && (length = a.length()) == b.length()) {
+                    if (a instanceof String && b instanceof String) {
+                        return a.equals(b);
+                    } else {
+                        for (int i = 0; i < length; i++) {
+                            if (a.charAt(i) != b.charAt(i)) return false;
+                        }
+                        return true;
+                    }
+                }
+                return false;
+            }
+        });
+
+        when(TextUtils.isEmpty(any(CharSequence.class))).thenAnswer(new Answer<Boolean>() {
+            @Override
+            public Boolean answer(InvocationOnMock invocation) throws Throwable {
+                CharSequence param = (CharSequence) invocation.getArguments()[0];
+                return param == null || param.length() == 0;
+            }
+        });
+    }
+
+
+    public static ResultReceiver mockResultReceiver(final int expectedResultCode, final Bundle expectedBundle) {
+        ResultReceiver resultReceiver = mock(ResultReceiver.class);
+
+        doAnswer(new Answer() {
+            @Override
+            public Object answer(InvocationOnMock invocation) throws Throwable {
+                Object[] arguments = invocation.getArguments();
+                int resultCode = (int) arguments[0];
+                Bundle bundle = (Bundle) arguments[1];
+                Set<String> keys = expectedBundle.keySet();
+                Iterator<String> iterator = keys.iterator();
+                HashMap<String, Integer> expectedIntegers = new HashMap<>();
+                HashMap<String, String> expectedStrings = new HashMap<>();
+                HashMap<String, Boolean> expectedBooleans = new HashMap<>();
+                HashMap<String, Parcelable> expectedParcelables = new HashMap<>();
+                while (iterator.hasNext()) {
+                    String key = iterator.next();
+                    Object value = expectedBundle.get(key);
+
+                    if (value instanceof Boolean) {
+                        expectedBooleans.put(key, (Boolean) value);
+                    } else if (value instanceof Integer) {
+                        expectedIntegers.put(key, (Integer) value);
+                    } else if (value instanceof String) {
+                        expectedStrings.put(key, (String) value);
+                    } else if (value instanceof Parcelable) {
+                        expectedParcelables.put(key, (Parcelable) value);
+                    }
+                }
+                assertThat("expected bundle: ", bundle, new BundleMatcher(expectedIntegers, expectedStrings, expectedBooleans, expectedParcelables));
+                assertEquals("expected resultCode: ", expectedResultCode, resultCode);
+                return null;
+            }
+        }).when(resultReceiver).send(anyInt(), any(Bundle.class));
+        return resultReceiver;
+    }
+
+    public static void mockFingerprintForCertificate(String mockedFingerprint) throws CertificateEncodingException, NoSuchAlgorithmException {
+        mockStatic(ConfigHelper.class);
+        when(ConfigHelper.getFingerprintFromCertificate(any(X509Certificate.class), anyString())).thenReturn(mockedFingerprint);
+        when(ConfigHelper.checkErroneousDownload(anyString())).thenCallRealMethod();
+        when(ConfigHelper.base64toHex(anyString())).thenCallRealMethod();
+        when(ConfigHelper.parseX509CertificateFromString(anyString())).thenCallRealMethod();
+    }
+
+    public static void mockProviderApiConnector(final BackendAnswerFabric.TestBackendErrorCase errorCase) throws IOException {
+        mockStatic(ProviderApiConnector.class);
+        when(ProviderApiConnector.canConnect(any(OkHttpClient.class), anyString())).thenReturn(errorCase != ERROR_NO_CONNECTION);
+        when(ProviderApiConnector.requestStringFromServer(anyString(), anyString(), nullable(String.class), ArgumentMatchers.<Pair<String,String>>anyList(), any(OkHttpClient.class))).thenAnswer(getAnswerForErrorcase(errorCase));
+    }
+
+    public static OkHttpClientGenerator mockClientGenerator() {
+        OkHttpClientGenerator mockClientGenerator = mock(OkHttpClientGenerator.class);
+        OkHttpClient mockedOkHttpClient = mock(OkHttpClient.class);
+        when(mockClientGenerator.initCommercialCAHttpClient(any(JSONObject.class))).thenReturn(mockedOkHttpClient);
+        when(mockClientGenerator.initSelfSignedCAHttpClient(any(JSONObject.class))).thenReturn(mockedOkHttpClient);
+        when(mockClientGenerator.initSelfSignedCAHttpClient(any(JSONObject.class), anyString())).thenReturn(mockedOkHttpClient);
+        return mockClientGenerator;
+    }
+
+    public static Resources mockResources(InputStream inputStream) throws IOException, JSONException {
+        Resources mockedResources = mock(Resources.class, RETURNS_DEEP_STUBS);
+        JSONObject errorMessages = new JSONObject(getInputAsString(inputStream));
+
+
+        when(mockedResources.getString(R.string.warning_corrupted_provider_details)).
+                thenReturn(errorMessages.getString("warning_corrupted_provider_details"));
+        when(mockedResources.getString(R.string.server_unreachable_message)).
+                thenReturn(errorMessages.getString("server_unreachable_message"));
+        when(mockedResources.getString(R.string.error_security_pinnedcertificate)).
+                thenReturn(errorMessages.getString("error.security.pinnedcertificate"));
+        when(mockedResources.getString(R.string.malformed_url)).
+                thenReturn(errorMessages.getString("malformed_url"));
+        when(mockedResources.getString(R.string.certificate_error)).
+                thenReturn(errorMessages.getString("certificate_error"));
+        when(mockedResources.getString(R.string.error_srp_math_error_user_message)).
+                thenReturn(errorMessages.getString("error_srp_math_error_user_message"));
+        when(mockedResources.getString(R.string.error_bad_user_password_user_message)).
+                thenReturn(errorMessages.getString("error_bad_user_password_user_message"));
+        when(mockedResources.getString(R.string.error_not_valid_password_user_message)).
+                thenReturn(errorMessages.getString("error_not_valid_password_user_message"));
+        when(mockedResources.getString(R.string.error_client_http_user_message)).
+                thenReturn(errorMessages.getString("error_client_http_user_message"));
+        when(mockedResources.getString(R.string.error_io_exception_user_message)).
+                thenReturn(errorMessages.getString("error_io_exception_user_message"));
+        when(mockedResources.getString(R.string.error_json_exception_user_message)).
+                thenReturn(errorMessages.getString("error_json_exception_user_message"));
+        when(mockedResources.getString(R.string.error_no_such_algorithm_exception_user_message)).
+                thenReturn(errorMessages.getString("error_no_such_algorithm_exception_user_message"));
+        when(mockedResources.getString(R.string.warning_corrupted_provider_details)).
+                thenReturn(errorMessages.getString("warning_corrupted_provider_details"));
+        when(mockedResources.getString(R.string.warning_corrupted_provider_cert)).
+                thenReturn(errorMessages.getString("warning_corrupted_provider_cert"));
+        when(mockedResources.getString(R.string.warning_expired_provider_cert)).
+                thenReturn(errorMessages.getString("warning_expired_provider_cert"));
+        return mockedResources;
+    }
+
+}
diff --git a/app/src/test/java/se/leap/bitmaskclient/testutils/answers/BackendAnswerFabric.java b/app/src/test/java/se/leap/bitmaskclient/testutils/answers/BackendAnswerFabric.java
new file mode 100644
index 00000000..00e276f4
--- /dev/null
+++ b/app/src/test/java/se/leap/bitmaskclient/testutils/answers/BackendAnswerFabric.java
@@ -0,0 +1,82 @@
+/**
+ * Copyright (c) 2018 LEAP Encryption Access Project and contributers
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package se.leap.bitmaskclient.testutils.answers;
+
+import org.mockito.stubbing.Answer;
+
+/**
+ * Created by cyberta on 09.01.18.
+ */
+
+public class BackendAnswerFabric {
+    /**
+     * This enum can be useful to provide different responses from a mocked ProviderApiConnector
+     * in order to test different error scenarios
+     */
+    public enum TestBackendErrorCase {
+        NO_ERROR,
+        ERROR_NO_RESPONSE_BODY,         // => NullPointerException
+        ERROR_DNS_RESOLUTION_ERROR,     // => UnkownHostException
+        ERROR_SOCKET_TIMEOUT,           // => SocketTimeoutException
+        ERROR_WRONG_PROTOCOL,           // => MalformedURLException
+        ERROR_CERTIFICATE_INVALID,      // => SSLHandshakeException
+        ERROR_WRONG_PORT,               // => ConnectException
+        ERROR_PAYLOAD_MISSING,          // => IllegalArgumentException
+        ERROR_TLS_1_2_NOT_SUPPORTED,    // => UnknownServiceException
+        ERROR_UNKNOWN_IO_EXCEPTION,     // => IOException
+        ERROR_NO_ACCESS,
+        ERROR_INVALID_SESSION_TOKEN,
+        ERROR_NO_CONNECTION,
+        ERROR_WRONG_SRP_CREDENTIALS
+    }
+
+    public static Answer<String> getAnswerForErrorcase(TestBackendErrorCase errorCase) {
+        switch (errorCase) {
+            case NO_ERROR:
+                return new NoErrorAnswer();
+            case ERROR_NO_RESPONSE_BODY:
+                break;
+            case ERROR_DNS_RESOLUTION_ERROR:
+                break;
+            case ERROR_SOCKET_TIMEOUT:
+                break;
+            case ERROR_WRONG_PROTOCOL:
+                break;
+            case ERROR_CERTIFICATE_INVALID:
+                break;
+            case ERROR_WRONG_PORT:
+                break;
+            case ERROR_PAYLOAD_MISSING:
+                break;
+            case ERROR_TLS_1_2_NOT_SUPPORTED:
+                break;
+            case ERROR_UNKNOWN_IO_EXCEPTION:
+                break;
+            case ERROR_NO_ACCESS:
+                break;
+            case ERROR_INVALID_SESSION_TOKEN:
+                break;
+            case ERROR_NO_CONNECTION:
+                break;
+            case ERROR_WRONG_SRP_CREDENTIALS:
+                break;
+        }
+        return null;
+    }
+
+}
diff --git a/app/src/test/java/se/leap/bitmaskclient/testutils/answers/NoErrorAnswer.java b/app/src/test/java/se/leap/bitmaskclient/testutils/answers/NoErrorAnswer.java
new file mode 100644
index 00000000..cbf9f6b8
--- /dev/null
+++ b/app/src/test/java/se/leap/bitmaskclient/testutils/answers/NoErrorAnswer.java
@@ -0,0 +1,58 @@
+/**
+ * Copyright (c) 2018 LEAP Encryption Access Project and contributers
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package se.leap.bitmaskclient.testutils.answers;
+
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
+
+import static se.leap.bitmaskclient.testutils.TestSetupHelper.getInputAsString;
+
+/**
+ * Created by cyberta on 09.01.18.
+ */
+
+public class NoErrorAnswer implements Answer<String> {
+    @Override
+    public String answer(InvocationOnMock invocation) throws Throwable {
+        String url = (String) invocation.getArguments()[0];
+        String requestMethod = (String) invocation.getArguments()[1];
+        String jsonPayload = (String) invocation.getArguments()[2];
+
+        if (url.contains("/provider.json")) {
+            //download provider json
+            return getInputAsString(getClass().getClassLoader().getResourceAsStream("riseup.net.json"));
+        } else if (url.contains("/ca.crt")) {
+            //download provider ca cert
+            return getInputAsString(getClass().getClassLoader().getResourceAsStream("riseup.net.pem"));
+        } else if (url.contains("config/eip-service.json")) {
+            // download provider service json containing gateways, locations and openvpn settings
+            return getInputAsString(getClass().getClassLoader().getResourceAsStream("riseup.service.json"));
+        } else if (url.contains("/users.json")) {
+            //create new user
+            //TODO: implement me
+        } else if (url.contains("/sessions.json")) {
+            //srp auth: sendAToSRPServer
+            //TODO: implement me
+        } else if (url.contains("/sessions/parmegvtest10.json")){
+            //srp auth: sendM1ToSRPServer
+            //TODO: implement me
+        }
+
+        return null;
+    }
+}
diff --git a/app/src/test/java/se/leap/bitmaskclient/testutils/matchers/BundleMatcher.java b/app/src/test/java/se/leap/bitmaskclient/testutils/matchers/BundleMatcher.java
new file mode 100644
index 00000000..a7867e08
--- /dev/null
+++ b/app/src/test/java/se/leap/bitmaskclient/testutils/matchers/BundleMatcher.java
@@ -0,0 +1,192 @@
+package se.leap.bitmaskclient.testutils.matchers;
+
+import android.os.Bundle;
+import android.os.Parcelable;
+
+import org.hamcrest.BaseMatcher;
+import org.hamcrest.Description;
+
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Set;
+
+/**
+ * Created by cyberta on 09.01.18.
+ */
+
+public class BundleMatcher extends BaseMatcher<Bundle> {
+
+    private final HashMap<String, Integer> expectedIntegers;
+    private final HashMap<String, String> expectedStrings;
+    private final HashMap<String, Boolean> expectedBooleans;
+    private final HashMap<String, Parcelable> expectedParcelables;
+    private HashMap<String, Integer> unfoundExpectedInteger  = new HashMap<>();
+    private HashMap<String, Boolean> unfoundExpectedBoolean = new HashMap<>();
+    private HashMap<String, String> unfoundExpectedString = new HashMap<>();
+    private HashMap<String, Parcelable> unfoundExpectedParcelable = new HashMap<>();
+    private HashMap<String, Object> unexpectedAdditionalObjects = new HashMap<>();
+
+    public BundleMatcher(HashMap<String, Integer> expectedIntegers, HashMap<String, String> expectedStrings, HashMap<String, Boolean> expectedBooleans, HashMap<String, Parcelable> expectedParcelables) {
+        this.expectedBooleans = expectedBooleans;
+        this.expectedIntegers = expectedIntegers;
+        this.expectedStrings = expectedStrings;
+        this.expectedParcelables = expectedParcelables;
+    }
+
+    @Override
+    public boolean matches(Object item) {
+        if (item instanceof Bundle) {
+            Bundle actualBundle = (Bundle) item;
+            return checkActualBundleHasAllExpectedBooleanValues(actualBundle) &&
+                    checkActualBundleHasAllExpectedStringValues(actualBundle) &&
+                    checkActualBundleHasAllExpectedIntValues(actualBundle) &&
+                    checkActualBundleHasAllExpectedParcelableValues(actualBundle) &&
+                    checkUnexpectedAdditionalValuesIn(actualBundle);
+        }
+        return false;
+    }
+
+    @Override
+    public void describeTo(Description description) {
+        description.appendText("Bundle didn't match expectation!");
+
+        if (!unfoundExpectedInteger.isEmpty()) {
+            Iterator<String> iterator = unfoundExpectedInteger.keySet().iterator();
+            while (iterator.hasNext()) {
+                String key = iterator.next();
+                if (unfoundExpectedInteger.get(key) == null) {
+                    description.appendText("\n unfound Integer in actual Bundle: ").appendValue(iterator.next());
+                } else {
+                    description.appendText("\n expected Integer for key " + key).appendValue(expectedIntegers.get(key)).
+                            appendText("\n found Integer was: ").appendValue(unfoundExpectedInteger.get(key));
+                }
+            }
+        }
+        if (!unfoundExpectedBoolean.isEmpty()) {
+            Iterator<String> iterator = unfoundExpectedBoolean.keySet().iterator();
+            while (iterator.hasNext()) {
+                String key = iterator.next();
+                if (unfoundExpectedBoolean.get(key) == null) {
+                    description.appendText("\n unfound Boolean in actual Bundle: ").appendValue(iterator.next());
+                } else {
+                    description.appendText("\n expected Boolean for key " + key).appendValue(expectedBooleans.get(key)).
+                            appendText("\n found Boolean was: ").appendValue(unfoundExpectedBoolean.get(key));
+                }
+            }
+        }
+        if (!unfoundExpectedString.isEmpty()) {
+            Iterator<String> iterator = unfoundExpectedString.keySet().iterator();
+            while (iterator.hasNext()) {
+                String key = iterator.next();
+                if (unfoundExpectedString.get(key) == null) {
+                    description.appendText("\n unfound String in actual Bundle: ").appendValue(iterator.next());
+                } else {
+                    description.appendText("\n expected String for key " + key).appendValue(expectedStrings.get(key)).
+                            appendText("\n found String was: ").appendValue(unfoundExpectedString.get(key));
+                }
+            }
+        }
+        if (!unfoundExpectedParcelable.isEmpty()) {
+            Iterator<String> iterator = unfoundExpectedInteger.keySet().iterator();
+            while (iterator.hasNext()) {
+                String key = iterator.next();
+                if (unfoundExpectedParcelable.get(key) == null) {
+                    description.appendText("\n unfound Parcelable in actual Bundle: ").appendValue(iterator.next());
+                } else {
+                    description.appendText("\n expected Parcelable or key " + key).appendValue(expectedParcelables.get(key)).
+                            appendText("\n found Parcelable was: ").appendValue(unfoundExpectedParcelable.get(key));
+                }
+            }
+        }
+
+        if (!unexpectedAdditionalObjects.isEmpty()) {
+            Iterator<String> iterator = unexpectedAdditionalObjects.keySet().iterator();
+            while (iterator.hasNext()) {
+                String key = iterator.next();
+                Object value = unexpectedAdditionalObjects.get(key);
+                if (value instanceof String) {
+                    description.appendText("\n unexpected String found in actual Bundle: ").appendValue(key).appendText(", ").appendValue(value);
+                } else if (value instanceof Boolean) {
+                    description.appendText("\n unexpected Boolean found in actual Bundle: ").appendValue(key).appendText(", ").appendValue(value);
+                } else if (value instanceof Integer) {
+                    description.appendText("\n unexpected Integer found in actual Bundle: ").appendValue(key).appendText(", ").appendValue(value);
+                } else if (value instanceof Parcelable) {
+                    description.appendText("\n unexpected Parcelable found in actual Bundle: ").appendValue(key).appendText(", ").appendValue(value);
+                } else {
+                    description.appendText("\n unexpected Object found in actual Bundle: ").appendValue(key).appendText(", ").appendValue(value);
+                }
+            }
+        }
+    }
+
+    private boolean checkActualBundleHasAllExpectedBooleanValues(Bundle actualBundle) {
+        Set<String> booleanKeys = expectedBooleans.keySet();
+        for (String key : booleanKeys) {
+            Object valueObject = actualBundle.get(key);
+            if (valueObject == null ||
+                    !(valueObject instanceof Boolean) ||
+                    valueObject != expectedBooleans.get(key)) {
+                unfoundExpectedBoolean.put(key, (Boolean) valueObject);
+                return false;
+            }
+        }
+        return true;
+    }
+
+    private boolean checkActualBundleHasAllExpectedStringValues(Bundle actualBundle) {
+        Set<String> stringKeys = expectedStrings.keySet();
+        for (String key : stringKeys) {
+            Object valueObject = actualBundle.get(key);
+            if (valueObject == null ||
+                    !(valueObject instanceof String) ||
+                    !valueObject.equals(expectedStrings.get(key))) {
+                unfoundExpectedString.put(key, (String) valueObject);
+                return false;
+            }
+        }
+        return true;
+    }
+
+    private boolean checkActualBundleHasAllExpectedIntValues(Bundle actualBundle) {
+        Set<String> stringKeys = expectedIntegers.keySet();
+        for (String key : stringKeys) {
+            Object valueObject = actualBundle.get(key);
+            if (valueObject == null ||
+                    !(valueObject instanceof Integer) ||
+                    ((Integer) valueObject).compareTo(expectedIntegers.get(key)) != 0) {
+                unfoundExpectedInteger.put(key, (Integer) valueObject);
+                return false;
+            }
+        }
+        return true;
+    }
+
+    private boolean checkActualBundleHasAllExpectedParcelableValues(Bundle actualBundle) {
+        Set<String> stringKeys = expectedParcelables.keySet();
+        for (String key : stringKeys) {
+            Object valueObject = actualBundle.get(key);
+            if (valueObject == null ||
+                    !(valueObject instanceof Parcelable) ||
+                    !valueObject.equals(expectedParcelables.get(key))) {
+                unfoundExpectedParcelable.put(key, (Parcelable) valueObject);
+                return false;
+            }
+        }
+        return true;
+    }
+
+    private boolean checkUnexpectedAdditionalValuesIn(Bundle actualBundle) {
+        Set<String> keys = actualBundle.keySet();
+
+        for (String key : keys) {
+            if (!expectedStrings.containsKey(key) &&
+                    !expectedIntegers.containsKey(key) &&
+                    !expectedBooleans.containsKey(key) &&
+                    !expectedParcelables.containsKey(key)
+                    ) {
+                unexpectedAdditionalObjects.put(key, actualBundle.getString(key));
+            }
+        }
+        return unexpectedAdditionalObjects.isEmpty();
+    }
+}