fix: add tests for finding tags with partial versions

Author: YazdanRa

tests/test_tags.py

@@ -35,3 +35,67 @@ def test_find_tag_for_full_version_remains_exact():
 
     assert found is not None
     assert found.name == "1.2.1"
+
+
+def test_find_tag_for_partial_version_with_prereleases_prefers_latest_version():
+    tags = [
+        _git_tag("1.2.0b1"),
+        _git_tag("1.2.0"),
+        _git_tag("1.2.1b1"),
+    ]
+
+    rules = TagRules()
+
+    found = rules.find_tag_for(tags, "1.2")
+
+    assert found is not None
+    # 1.2.1b1 > 1.2.0 so it should be selected
+    assert found.name == "1.2.1b1"
+
+
+def test_find_tag_for_partial_version_respects_tag_format():
+    tags = [
+        _git_tag("v1.2.0"),
+        _git_tag("v1.2.1"),
+        _git_tag("v1.3.0"),
+    ]
+
+    rules = TagRules(tag_format="v$version")
+
+    found = rules.find_tag_for(tags, "1.2")
+
+    assert found is not None
+    assert found.name == "v1.2.1"
+
+    found = rules.find_tag_for(tags, "1")
+
+    assert found is not None
+    assert found.name == "v1.3.0"
+
+
+def test_find_tag_for_partial_version_returns_none_when_no_match():
+    tags = [
+        _git_tag("2.0.0"),
+        _git_tag("2.1.0"),
+    ]
+
+    rules = TagRules()
+
+    found = rules.find_tag_for(tags, "1.2")
+
+    assert found is None
+
+
+def test_find_tag_for_partial_version_ignores_invalid_tags():
+    tags = [
+        _git_tag("not-a-version"),
+        _git_tag("1.2.0"),
+        _git_tag("1.2.1"),
+    ]
+
+    rules = TagRules()
+
+    found = rules.find_tag_for(tags, "1.2")
+
+    assert found is not None
+    assert found.name == "1.2.1"