test(changelog): cover more smart tag range test cases

Author: bearomorphism

tests/test_changelog.py

@@ -1537,6 +1537,25 @@ def test_get_smart_tag_range_returns_an_extra_for_a_single_tag(tags):
     assert 2 == len(res)
 
 
+def test_get_smart_tag_range_returns_an_empty_list_for_nonexistent_end_tag(tags):
+    start = tags[0]
+    res = changelog.get_smart_tag_range(tags, start.name, "nonexistent")
+    assert len(tags) == len(res)
+
+
+def test_get_smart_tag_range_returns_an_empty_list_for_nonexistent_start_tag(tags):
+    end = tags[0]
+    res = changelog.get_smart_tag_range(tags, "nonexistent", end.name)
+    assert 1 == len(res)
+
+
+def test_get_smart_tag_range_returns_an_empty_list_for_nonexistent_start_and_end_tags(
+    tags,
+):
+    res = changelog.get_smart_tag_range(tags, "nonexistent", "nonexistent")
+    assert 0 == len(res)
+
+
 @dataclass
 class TagDef:
     name: str