8773 more test cases and clean-up

11 files changed, 452 insertions, 84 deletions

diff --git a/app/src/test/java/se/leap/bitmaskclient/eip/ProviderApiManagerTest.java b/app/src/test/java/se/leap/bitmaskclient/eip/ProviderApiManagerTest.java
index c39681c4..9ca90b17 100644
--- a/app/src/test/java/se/leap/bitmaskclient/eip/ProviderApiManagerTest.java
+++ b/app/src/test/java/se/leap/bitmaskclient/eip/ProviderApiManagerTest.java
@@ -49,6 +49,8 @@ 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.BackendMockResponses.BackendMockProvider.TestBackendErrorCase.ERROR_CASE_UPDATED_CERTIFICATE;
+import static se.leap.bitmaskclient.testutils.BackendMockResponses.BackendMockProvider.TestBackendErrorCase.NO_ERROR;
 import static se.leap.bitmaskclient.testutils.TestSetupHelper.getInputAsString;
 import static se.leap.bitmaskclient.testutils.TestSetupHelper.mockBundle;
 import static se.leap.bitmaskclient.testutils.TestSetupHelper.mockClientGenerator;
@@ -58,7 +60,7 @@ import static se.leap.bitmaskclient.testutils.TestSetupHelper.mockProviderApiCon
 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.
@@ -188,7 +190,7 @@ public class ProviderApiManagerTest {
         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.\"}");
+        expectedResult.putString(ERRORS, "{\"errorId\":\"ERROR_CERTIFICATE_PINNING\",\"errors\":\"Stored provider certificate is invalid. You can either update Bitmask (recommended) or update the provider certificate using a commercial CA certificate.\"}");
 
         Intent provider_API_command = mockIntent();
         Bundle parameters = mockBundle();
@@ -210,7 +212,7 @@ public class ProviderApiManagerTest {
         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.\"}");
+        expectedResult.putString(ERRORS, "{\"errorId\":\"ERROR_CERTIFICATE_PINNING\",\"errors\":\"Stored provider certificate is invalid. You can either update Bitmask (recommended) or update the provider certificate using a commercial CA certificate.\"}");
 
         Intent provider_API_command = mockIntent();
         Bundle parameters = mockBundle();
@@ -232,11 +234,33 @@ public class ProviderApiManagerTest {
         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.\"}");
+        expectedResult.putString(ERRORS, "{\"errorId\":\"ERROR_CERTIFICATE_PINNING\",\"errors\":\"Stored provider certificate is invalid. 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_preseededProviderAndCA_outdatedCertificate() throws IOException, CertificateEncodingException, NoSuchAlgorithmException {
+        mockProviderApiConnector(NO_ERROR);
+        providerApiManager = new ProviderApiManager(mockPreferences, mockResources, mockClientGenerator(), new TestProviderApiServiceCallback());
+        Bundle expectedResult = mockBundle();
+        expectedResult.putBoolean(RESULT_KEY, false);
+        expectedResult.putString(ERRORS, "{\"errorId\":\"ERROR_INVALID_CERTIFICATE\",\"errors\":\"Stored provider certificate is expired. 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("outdated_cert.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);
@@ -245,5 +269,69 @@ public class ProviderApiManagerTest {
         providerApiManager.handleIntent(provider_API_command);
     }
 
+    @Test
+    public void test_handleIntentSetupProvider_storedProviderAndCAFromPreviousSetup_outdatedCertificate() throws IOException, CertificateEncodingException, NoSuchAlgorithmException {
+        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("outdated_cert.pem"))).apply();
+        providerApiManager = new ProviderApiManager(mockPreferences, mockResources, mockClientGenerator(), new TestProviderApiServiceCallback());
+        Bundle expectedResult = mockBundle();
+        expectedResult.putBoolean(RESULT_KEY, false);
+        expectedResult.putString(ERRORS, "{\"errorId\":\"ERROR_INVALID_CERTIFICATE\",\"errors\":\"Stored provider certificate is expired. 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_preseededProviderAndCA_ValidCertificateButUpdatedCertificateOnServerSide() throws IOException, CertificateEncodingException, NoSuchAlgorithmException {
+        mockFingerprintForCertificate(" a5244308a1374709a9afce95e3ae47c1b44bc2398c0a70ccbf8b3a8a97f29494");
+        mockProviderApiConnector(ERROR_CASE_UPDATED_CERTIFICATE);
+
+        providerApiManager = new ProviderApiManager(mockPreferences, mockResources, mockClientGenerator(), new TestProviderApiServiceCallback());
+        Bundle expectedResult = mockBundle();
+        expectedResult.putBoolean(RESULT_KEY, false);
+        expectedResult.putString(ERRORS, "{\"errorId\":\"ERROR_INVALID_CERTIFICATE\",\"errors\":\"Stored provider certificate is invalid. 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_storedProviderAndCAFromPreviousSetup_ValidCertificateButUpdatedCertificateOnServerSide() throws IOException, CertificateEncodingException, NoSuchAlgorithmException {
+        mockFingerprintForCertificate("a5244308a1374709a9afce95e3ae47c1b44bc2398c0a70ccbf8b3a8a97f29494");
+        mockProviderApiConnector(ERROR_CASE_UPDATED_CERTIFICATE);
+        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_INVALID_CERTIFICATE\",\"errors\":\"Stored provider certificate is invalid. 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/testutils/answers/BackendAnswerFabric.java b/app/src/test/java/se/leap/bitmaskclient/testutils/BackendMockResponses/BackendMockProvider.java
index 00e276f4..9069661f 100644
--- a/app/src/test/java/se/leap/bitmaskclient/testutils/answers/BackendAnswerFabric.java
+++ b/app/src/test/java/se/leap/bitmaskclient/testutils/BackendMockResponses/BackendMockProvider.java
@@ -14,22 +14,22 @@
  * 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.BackendMockResponses;
 
-package se.leap.bitmaskclient.testutils.answers;
-
-import org.mockito.stubbing.Answer;
+import java.io.IOException;
 
 /**
- * Created by cyberta on 09.01.18.
+ * Created by cyberta on 10.01.18.
  */
 
-public class BackendAnswerFabric {
+public class BackendMockProvider {
     /**
      * 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_CASE_UPDATED_CERTIFICATE,
         ERROR_NO_RESPONSE_BODY,         // => NullPointerException
         ERROR_DNS_RESOLUTION_ERROR,     // => UnkownHostException
         ERROR_SOCKET_TIMEOUT,           // => SocketTimeoutException
@@ -45,10 +45,16 @@ public class BackendAnswerFabric {
         ERROR_WRONG_SRP_CREDENTIALS
     }
 
-    public static Answer<String> getAnswerForErrorcase(TestBackendErrorCase errorCase) {
+
+    public static void provideBackendResponsesFor(TestBackendErrorCase errorCase) throws IOException {
         switch (errorCase) {
+
             case NO_ERROR:
-                return new NoErrorAnswer();
+                new NoErrorBackendResponse();
+                break;
+            case ERROR_CASE_UPDATED_CERTIFICATE:
+                new UpdatedCertificateBackendResponse();
+                break;
             case ERROR_NO_RESPONSE_BODY:
                 break;
             case ERROR_DNS_RESOLUTION_ERROR:
@@ -76,7 +82,5 @@ public class BackendAnswerFabric {
             case ERROR_WRONG_SRP_CREDENTIALS:
                 break;
         }
-        return null;
     }
-
 }
diff --git a/app/src/test/java/se/leap/bitmaskclient/testutils/BackendMockResponses/BaseBackendResponse.java b/app/src/test/java/se/leap/bitmaskclient/testutils/BackendMockResponses/BaseBackendResponse.java
new file mode 100644
index 00000000..98224019
--- /dev/null
+++ b/app/src/test/java/se/leap/bitmaskclient/testutils/BackendMockResponses/BaseBackendResponse.java
@@ -0,0 +1,75 @@
+/**
+ * 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.BackendMockResponses;
+
+import android.util.Pair;
+
+import org.mockito.ArgumentMatchers;
+import org.mockito.Mockito;
+import org.mockito.stubbing.Answer;
+
+import java.io.IOException;
+
+import okhttp3.OkHttpClient;
+import se.leap.bitmaskclient.ProviderApiConnector;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.ArgumentMatchers.nullable;
+import static org.powermock.api.mockito.PowerMockito.mockStatic;
+
+/**
+ * Created by cyberta on 10.01.18.
+ */
+
+public abstract class BaseBackendResponse {
+
+    private Answer<String> answerRequestStringFromServer;
+    private Answer<Boolean> answerCanConnect;
+    private Answer<Boolean> answerDelete;
+
+    public BaseBackendResponse() throws IOException {
+        mockStatic(ProviderApiConnector.class);
+        this.answerRequestStringFromServer = getAnswerForRequestStringFromServer();
+        this.answerCanConnect = getAnswerForCanConnect();
+        this.answerDelete = getAnswerForDelete();
+
+        responseOnRequestStringFromServer();
+        responseOnCanConnect();
+        responseOnDelete();
+
+    }
+
+    public abstract Answer<String> getAnswerForRequestStringFromServer();
+    public abstract Answer<Boolean> getAnswerForCanConnect();
+    public abstract Answer<Boolean> getAnswerForDelete();
+
+
+    public void responseOnRequestStringFromServer() throws IOException, RuntimeException {
+        Mockito.when(ProviderApiConnector.requestStringFromServer(anyString(), anyString(), nullable(String.class), ArgumentMatchers.<Pair<String,String>>anyList(), any(OkHttpClient.class))).
+                thenAnswer(answerRequestStringFromServer);
+    }
+
+    public void responseOnCanConnect() throws IOException, RuntimeException {
+        Mockito.when(ProviderApiConnector.canConnect(any(OkHttpClient.class), anyString())).thenAnswer(answerCanConnect);
+    }
+
+    public void responseOnDelete() throws IOException, RuntimeException {
+        Mockito.when(ProviderApiConnector.delete(any(OkHttpClient.class), anyString())).thenAnswer(answerDelete);
+    }
+
+}
diff --git a/app/src/test/java/se/leap/bitmaskclient/testutils/BackendMockResponses/NoErrorBackendResponse.java b/app/src/test/java/se/leap/bitmaskclient/testutils/BackendMockResponses/NoErrorBackendResponse.java
new file mode 100644
index 00000000..fa318e42
--- /dev/null
+++ b/app/src/test/java/se/leap/bitmaskclient/testutils/BackendMockResponses/NoErrorBackendResponse.java
@@ -0,0 +1,89 @@
+/**
+ * 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.BackendMockResponses;
+
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
+
+import java.io.IOException;
+
+import static se.leap.bitmaskclient.testutils.TestSetupHelper.getInputAsString;
+
+/**
+ * Created by cyberta on 10.01.18.
+ */
+
+public class NoErrorBackendResponse extends BaseBackendResponse {
+    public NoErrorBackendResponse() throws IOException {
+        super();
+    }
+
+    @Override
+    public Answer<String> getAnswerForRequestStringFromServer() {
+        return new 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;
+            }
+        };
+    }
+
+    @Override
+    public Answer<Boolean> getAnswerForCanConnect() {
+        return new Answer<Boolean>() {
+            @Override
+            public Boolean answer(InvocationOnMock invocation) throws Throwable {
+                return true;
+            }
+        };
+    }
+
+    @Override
+    public Answer<Boolean> getAnswerForDelete() {
+        return new Answer<Boolean>() {
+            @Override
+            public Boolean answer(InvocationOnMock invocation) throws Throwable {
+                return true;
+            }
+        };
+    }
+
+}
diff --git a/app/src/test/java/se/leap/bitmaskclient/testutils/BackendMockResponses/UpdatedCertificateBackendResponse.java b/app/src/test/java/se/leap/bitmaskclient/testutils/BackendMockResponses/UpdatedCertificateBackendResponse.java
new file mode 100644
index 00000000..232649a1
--- /dev/null
+++ b/app/src/test/java/se/leap/bitmaskclient/testutils/BackendMockResponses/UpdatedCertificateBackendResponse.java
@@ -0,0 +1,97 @@
+/**
+ * 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.BackendMockResponses;
+
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
+
+import java.io.IOException;
+
+import javax.net.ssl.SSLHandshakeException;
+
+import static se.leap.bitmaskclient.testutils.TestSetupHelper.getInputAsString;
+
+/**
+ * Created by cyberta on 10.01.18.
+ */
+
+public class UpdatedCertificateBackendResponse extends BaseBackendResponse {
+    static volatile boolean wasCACertCalled = false;
+
+
+    public UpdatedCertificateBackendResponse() throws IOException {
+        super();
+    }
+
+    @Override
+    public Answer<String> getAnswerForRequestStringFromServer() {
+        return new Answer<String>() {
+
+            @Override
+            public String answer(InvocationOnMock invocation) throws Throwable {
+                String url = (String) invocation.getArguments()[0];
+
+                if (url.contains("/provider.json")) {
+                    if (!wasCACertCalled) {
+                        throw new SSLHandshakeException("Updated certificate on server side");
+                    }
+                    //download provider json
+                    return getInputAsString(getClass().getClassLoader().getResourceAsStream("riseup.net.json"));
+                } else if (url.contains("/ca.crt")) {
+                    //download provider ca cert
+                    wasCACertCalled = true;
+                    return getInputAsString(getClass().getClassLoader().getResourceAsStream("updated_cert.pem"));
+                } else if (url.contains("config/eip-service.json")) {
+                    // download provider service json containing gateways, locations and openvpn settings
+                    if (!wasCACertCalled) {
+                        throw new SSLHandshakeException("Updated certificate on server side");
+                    }
+                    return getInputAsString(getClass().getClassLoader().getResourceAsStream("riseup.service.json"));
+                }
+
+                return null;
+            }
+        };
+    }
+
+    @Override
+    public Answer<Boolean> getAnswerForCanConnect() {
+        return new Answer<Boolean>() {
+            @Override
+            public Boolean answer(InvocationOnMock invocation) throws Throwable {
+                if (!wasCACertCalled) {
+                    throw new SSLHandshakeException("Updated certificate on server side");
+                }
+                return true;
+            }
+        };
+    }
+
+    @Override
+    public Answer<Boolean> getAnswerForDelete() {
+        return new Answer<Boolean>() {
+            @Override
+            public Boolean answer(InvocationOnMock invocation) throws Throwable {
+                if (!wasCACertCalled) {
+                    throw new SSLHandshakeException("Updated certificate on server side");
+                }
+                return true;
+            }
+        };
+    }
+
+}
diff --git a/app/src/test/java/se/leap/bitmaskclient/testutils/TestSetupHelper.java b/app/src/test/java/se/leap/bitmaskclient/testutils/TestSetupHelper.java
index 19d7e13f..f8f70eaf 100644
--- a/app/src/test/java/se/leap/bitmaskclient/testutils/TestSetupHelper.java
+++ b/app/src/test/java/se/leap/bitmaskclient/testutils/TestSetupHelper.java
@@ -24,11 +24,9 @@ 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;
 
@@ -50,9 +48,8 @@ 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.BackendMockResponses.BackendMockProvider;
 import se.leap.bitmaskclient.testutils.matchers.BundleMatcher;
 
 import static org.junit.Assert.assertEquals;
@@ -61,14 +58,11 @@ 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.
@@ -383,14 +377,11 @@ public class TestSetupHelper {
         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 void mockProviderApiConnector(final BackendMockProvider.TestBackendErrorCase errorCase) throws IOException {
+        BackendMockProvider.provideBackendResponsesFor(errorCase);
     }
 
     public static OkHttpClientGenerator mockClientGenerator() {
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
deleted file mode 100644
index cbf9f6b8..00000000
--- a/app/src/test/java/se/leap/bitmaskclient/testutils/answers/NoErrorAnswer.java
+++ /dev/null
@@ -1,58 +0,0 @@
-/**
- * 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
index a7867e08..d2d2a102 100644
--- a/app/src/test/java/se/leap/bitmaskclient/testutils/matchers/BundleMatcher.java
+++ b/app/src/test/java/se/leap/bitmaskclient/testutils/matchers/BundleMatcher.java
@@ -1,3 +1,19 @@
+/**
+ * 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.matchers;
 
 import android.os.Bundle;
diff --git a/app/src/test/resources/error_messages.json b/app/src/test/resources/error_messages.json
index 486a3dab..4d72b074 100644
--- a/app/src/test/resources/error_messages.json
+++ b/app/src/test/resources/error_messages.json
@@ -11,6 +11,6 @@
 "error_json_exception_user_message": "Try again: Bad response from the server",
 "error_no_such_algorithm_exception_user_message": "Encryption algorithm not found. Please update your OS!",
 "warning_corrupted_provider_details": "Stored provider details are corrupted. You can either update Bitmask (recommended) or update the provider details using a commercial CA certificate.",
-"warning_corrupted_provider_cert": "Stored provider certificate is corrupted. You can either update Bitmask (recommended) or update the provider certificate using a commercial CA certificate.",
+"warning_corrupted_provider_cert": "Stored provider certificate is invalid. You can either update Bitmask (recommended) or update the provider certificate using a commercial CA certificate.",
 "warning_expired_provider_cert": "Stored provider certificate is expired. You can either update Bitmask (recommended) or update the provider certificate using a commercial CA certificate."
 }
\ No newline at end of file
diff --git a/app/src/test/resources/outdated_cert.pem b/app/src/test/resources/outdated_cert.pem
new file mode 100644
index 00000000..269efe5f
--- /dev/null
+++ b/app/src/test/resources/outdated_cert.pem
@@ -0,0 +1,33 @@
+-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
diff --git a/app/src/test/resources/updated_cert.pem b/app/src/test/resources/updated_cert.pem
new file mode 100644
index 00000000..21f9a693
--- /dev/null
+++ b/app/src/test/resources/updated_cert.pem
@@ -0,0 +1,33 @@
+-----BEGIN CERTIFICATE-----
+MIIFyTCCA7GgAwIBAgIJALD2RMhYzVdWMA0GCSqGSIb3DQEBCwUAMHsxCzAJBgNV
+BAYTAlVTMQswCQYDVQQIDAJOWTEWMBQGA1UEBwwNTmV3IFlvcmsgQ2l0eTENMAsG
+A1UECgwETEVBUDEVMBMGA1UECwwMVGVzdGluZyBEZXAuMSEwHwYJKoZIhvcNAQkB
+FhJkb25vdHJlcGx5QGxlYXAuc2UwHhcNMTgwMTA5MjMyMTQzWhcNMzMwMTA1MjMy
+MTQzWjB7MQswCQYDVQQGEwJVUzELMAkGA1UECAwCTlkxFjAUBgNVBAcMDU5ldyBZ
+b3JrIENpdHkxDTALBgNVBAoMBExFQVAxFTATBgNVBAsMDFRlc3RpbmcgRGVwLjEh
+MB8GCSqGSIb3DQEJARYSZG9ub3RyZXBseUBsZWFwLnNlMIICIjANBgkqhkiG9w0B
+AQEFAAOCAg8AMIICCgKCAgEAvJqdroZQdvKOE9o/aga9GRfaY05Bs7EKdRp3pabu
+O5uEyx0tRpbif+rcb3DRDWfIH+wxrNcSp5rRbQollttnH5Sdd0aG7taZLPCMHVlk
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+5xtBX0Iu2OybRUzL9kyWsXFSQx617v7tuXuPWg158Dg3RyCIC2VdwouzGGsJXslc
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+wS2GPxb5IZkB7u0yZQOkQ3hDtI4Ve8rj8Z0mK1S0HETU9kvA6/+3KmA1xeMjvlzL
+HNmyIfXtfd5NIIrrRuWwGR2Y9KrezAdW+UuxHDE2SLDNCzJKjyQhzi8110Vtlm4A
+45UCAwEAAaNQME4wHQYDVR0OBBYEFNm1kQeEsxrCNeJA7q/67Pz43/mVMB8GA1Ud
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+6Titg8k9qXw6Vv+QK08CJUUFva6vMNOIbWkKN7GfdQZOig2EqLZ+jBdIai/NZ+uD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-----END CERTIFICATE-----