Add comprehensive tests of lib/hash.py

lib/hash.py

@@ -34,13 +34,11 @@
 
 def sha256(x):
     '''Simple wrapper of hashlib sha256.'''
-    assert isinstance(x, (bytes, bytearray, memoryview))
     return hashlib.sha256(x).digest()
 
 
 def ripemd160(x):
     '''Simple wrapper of hashlib ripemd160.'''
-    assert isinstance(x, (bytes, bytearray, memoryview))
     h = hashlib.new('ripemd160')
     h.update(x)
     return h.digest()
@@ -63,13 +61,15 @@ def hash160(x):
     return ripemd160(sha256(x))
 
 
-def hash_to_str(x):
+def hash_to_hex_str(x):
     '''Convert a big-endian binary hash to displayed hex string.
 
     Display form of a binary hash is reversed and converted to hex.
     '''
     return bytes(reversed(x)).hex()
 
+# Temporary
+hash_to_str = hash_to_hex_str
 
 def hex_str_to_hash(x):
     '''Convert a displayed hex string to a binary hash.'''
@@ -98,7 +98,7 @@ def char_value(c):
     def decode(txt):
         """Decodes txt into a big-endian bytearray."""
         if not isinstance(txt, str):
-            raise Base58Error('a string is required')
+            raise TypeError('a string is required')
 
         if not txt:
             raise Base58Error('string cannot be empty')
@@ -151,7 +151,5 @@ def decode_check(txt):
     def encode_check(payload):
         """Encodes a payload bytearray (which includes the version byte(s))
         into a Base58Check string."""
-        assert isinstance(payload, (bytes, bytearray, memoryview))
-
         be_bytes = payload + double_sha256(payload)[:4]
         return Base58.encode(be_bytes)

tests/lib/test_hash.py

@@ -0,0 +1,68 @@
+#
+# Tests of lib/hash.py
+#
+
+import pytest
+
+import lib.hash as lib_hash
+
+
+def test_sha256():
+    assert lib_hash.sha256(b'sha256') == b'][\t\xf6\xdc\xb2\xd5:_\xff\xc6\x0cJ\xc0\xd5_\xab\xdfU`i\xd6c\x15E\xf4*\xa6\xe3P\x0f.'
+    with pytest.raises(TypeError):
+        lib_hash.sha256('sha256')
+
+def ripemd160(x):
+    assert lib_hash.ripemd160(b'ripemd160') == b'\x903\x91\xa1\xc0I\x9e\xc8\xdf\xb5\x1aSK\xa5VW\xf9|W\xd5'
+    with pytest.raises(TypeError):
+        lib_hash.ripemd160('ripemd160')
+
+def test_double_sha256():
+    assert lib_hash.double_sha256(b'double_sha256') == b'ksn\x8e\xb7\xb9\x0f\xf6\xd9\xad\x88\xd9#\xa1\xbcU(j1Bx\xce\xd5;s\xectL\xe7\xc5\xb4\x00'
+
+def test_hmac_sha512():
+    assert lib_hash.hmac_sha512(b'key', b'message') == b"\xe4w8M|\xa2)\xdd\x14&\xe6Kc\xeb\xf2\xd3n\xbdm~f\x9ag5BNr\xeal\x01\xd3\xf8\xb5n\xb3\x9c6\xd8#/T'\x99\x9b\x8d\x1a?\x9c\xd1\x12\x8f\xc6\x9fMu\xb44!h\x10\xfa6~\x98"
+
+def test_hash160():
+    assert lib_hash.hash160(b'hash_160') == b'\xb3\x96\x94\xfc\x978R\xa7)XqY\xbb\xdc\xeb\xac\xa7%\xb8$'
+
+def test_hash_to_hex_str():
+    assert lib_hash.hash_to_hex_str(b'hash_to_str') == '7274735f6f745f68736168'
+
+def test_hex_str_to_hash():
+    assert lib_hash.hex_str_to_hash('7274735f6f745f68736168') == b'hash_to_str'
+
+def test_Base58_char_value():
+    chars = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
+    for value, c in enumerate(chars):
+        assert lib_hash.Base58.char_value(c) == value
+    for c in (' ', 'I', '0', 'l', 'O'):
+        with pytest.raises(lib_hash.Base58Error):
+            lib_hash.Base58.char_value(c)
+
+def test_Base58_decode():
+    with pytest.raises(TypeError):
+        lib_hash.Base58.decode(b'foo')
+    with pytest.raises(lib_hash.Base58Error):
+        lib_hash.Base58.decode('')
+    assert lib_hash.Base58.decode('123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz') == b'\x00\x01\x11\xd3\x8e_\xc9\x07\x1f\xfc\xd2\x0bJv<\xc9\xaeO%+\xb4\xe4\x8f\xd6j\x83^%*\xda\x93\xffH\rm\xd4=\xc6*d\x11U\xa5'
+    assert lib_hash.Base58.decode('3i37NcgooY8f1S') == b'0123456789'
+
+def test_Base58_encode():
+    with pytest.raises(TypeError):
+        lib_hash.Base58.encode('foo')
+    assert lib_hash.Base58.encode(b'') == ''
+    assert lib_hash.Base58.encode(b'\0') == '1'
+    assert lib_hash.Base58.encode(b'0123456789') == '3i37NcgooY8f1S'
+
+def test_Base58_decode_check():
+    with pytest.raises(TypeError):
+        lib_hash.Base58.decode_check(b'foo')
+    assert lib_hash.Base58.decode_check('4t9WKfuAB8') == b'foo'
+    with pytest.raises(lib_hash.Base58Error):
+        lib_hash.Base58.decode_check('4t9WKfuAB9')
+
+def test_Base58_encode_check():
+    with pytest.raises(TypeError):
+        lib_hash.Base58.encode_check('foo')
+    assert lib_hash.Base58.encode_check(b'foo') == '4t9WKfuAB8'