test: 增加测试

tests/test_hasher.py

@@ -0,0 +1,25 @@
+"""Tests for heurams.services.hasher"""
+
+from heurams.services.hasher import get_md5, hash
+
+
+class TestGetMD5:
+    def test_known_value(self):
+        # MD5 of "hello" is known
+        assert get_md5("hello") == "5d41402abc4b2a76b9719d911017c592"
+
+    def test_empty_string(self):
+        assert get_md5("") == "d41d8cd98f00b204e9800998ecf8427e"
+
+    def test_unicode(self):
+        result = get_md5("中文测试")
+        assert isinstance(result, str)
+        assert len(result) == 32
+
+    def test_different_inputs_differ(self):
+        assert get_md5("abc") != get_md5("abcd")
+
+
+class TestHash:
+    def test_hash_delegates_to_md5(self):
+        assert hash("hello") == get_md5("hello")