Adding upstream version 4.6.0+dfsg.

Signed-off-by: Daniel Baumann <daniel@debian.org>

tests/test_cmd.py

@@ -0,0 +1,53 @@
+import pytest
+
+from commitizen import cmd
+from commitizen.exceptions import CharacterSetDecodeError
+
+
+# https://docs.python.org/3/howto/unicode.html
+def test_valid_utf8_encoded_strings():
+    valid_strings = (
+        "",
+        "ascii",
+        "🤦🏻‍♂️",
+        "﷽",
+        "\u0000",
+    )
+    assert all(s == cmd._try_decode(s.encode("utf-8")) for s in valid_strings)
+
+
+# A word of caution: just because an encoding can be guessed for a given
+# sequence of bytes and because that guessed encoding may yield a decoded
+# string, does not mean that that string was the original! For more, see:
+# https://docs.python.org/3/library/codecs.html#standard-encodings
+
+
+# Pick a random, non-utf8 encoding to test.
+def test_valid_cp1250_encoded_strings():
+    valid_strings = (
+        "",
+        "ascii",
+        "äöüß",
+        "ça va",
+        "jak se máte",
+    )
+    for s in valid_strings:
+        assert cmd._try_decode(s.encode("cp1250")) or True
+
+
+def test_invalid_bytes():
+    invalid_bytes = (b"\x73\xe2\x9d\xff\x00",)
+    for s in invalid_bytes:
+        with pytest.raises(CharacterSetDecodeError):
+            cmd._try_decode(s)
+
+
+def test_always_fail_decode():
+    class _bytes(bytes):
+        def decode(self, encoding="utf-8", errors="strict"):
+            raise UnicodeDecodeError(
+                encoding, self, 0, 0, "Failing intentionally for testing"
+            )
+
+    with pytest.raises(CharacterSetDecodeError):
+        cmd._try_decode(_bytes())