1 files changed, 33 insertions, 0 deletions
diff --git a/test/util_test.rb b/test/util_test.rb
new file mode 100644
index 0000000..9b1d09b
--- /dev/null
+++ b/test/util_test.rb
@@ -0,0 +1,33 @@
+require File.expand_path(File.dirname(__FILE__) + '/test_helper')
+
+class UtilTest < Test::Unit::TestCase
+
+  include SRP::Util
+
+  # comparing to the hash created with python srp lib to make sure
+  # we use the same constants and hash the same way.
+  def test_sha256_of_prime
+    n = BIG_PRIME_N
+    nhex = '%x' % [n]
+    assert_equal "494b6a801b379f37c9ee25d5db7cd70ffcfe53d01b7c9e4470eaca46bda24b39",
+      sha256_hex(nhex)
+  end
+
+  def test_hashing
+    x = sha256_str("testuser:password")
+    assert_equal 'a5376a27a385bcd791d76cbd6484e1bde130129210e4647a4583e49f45de107f',
+      x
+  end
+
+  def test_packing_hex_to_byte_string
+    shex = "7686acb8"
+    assert_equal [118, 134, 172, 184].pack('C*'), [shex].pack('H*')
+  end
+
+  def test_multiplier
+    # >>> "%x" % pysrp.H(sha, N, g)
+    assert_equal 'bf66c44a428916cad64aa7c679f3fd897ad4c375e9bbb4cbf2f5de241d618ef0',
+      "%x" % multiplier
+  end
+
+end