Move tests to tests folder

tests/test_pwhash.py

@@ -0,0 +1,36 @@
+from mail4one.pwhash import gen_pwhash, parse_hash, check_pass, SALT_LEN, KEY_LEN
+import unittest
+
+
+class TestPWHash(unittest.TestCase):
+
+    def test_expected_usage(self):
+        password = "Blah Blah ABCD"
+        pwhash = gen_pwhash(password)
+        pwinfo = parse_hash(pwhash)
+        self.assertEqual(len(pwinfo.salt), SALT_LEN)
+        self.assertEqual(len(pwinfo.scrypt_hash), KEY_LEN)
+        self.assertTrue(check_pass(password, pwinfo),
+                        "check pass with correct password")
+        self.assertFalse(check_pass("foobar", pwinfo),
+                         "check pass with wrong password")
+
+    def test_hardcoded_hash(self):
+        test_hash = "".join(c for c in """
+        AFTY5EVN7AX47ZL7UMH3BETYWFBTAV3XHR73CEFAJBPN2NIHPWD
+        ZHV2UQSMSPHSQQ2A2BFQBNC77VL7F2UKATQNJZGYLCSU6C43UQD
+        AQXWXSWNGAEPGIMG2F3QDKBXL3MRHY6K2BPID64ZR6LABLPVSF
+        """ if not c.isspace())
+        pwinfo = parse_hash(test_hash)
+        self.assertTrue(check_pass("helloworld", pwinfo),
+                        "check pass with correct password")
+        self.assertFalse(check_pass("foobar", pwinfo),
+                         "check pass with wrong password")
+
+    def test_invalid_hash(self):
+        with self.assertRaises(Exception):
+            parse_hash("sdlfkjdsklfjdsk")
+
+
+if __name__ == '__main__':
+    unittest.main()