refactor(changelog): fixes logic issue made evident by latest fix(git) commit

get_commits was calling git "git log None..None" in the event that a tag range is invalid. Raise exception sooner rather than later.

Author: bhelgs

commitizen/changelog.py

@@ -35,7 +35,7 @@
 
 from commitizen import defaults
 from commitizen.bump import normalize_tag
-from commitizen.exceptions import InvalidConfigurationError
+from commitizen.exceptions import InvalidConfigurationError, NoCommitsFoundError
 from commitizen.git import GitCommit, GitTag
 
 
@@ -309,7 +309,7 @@ def get_oldest_and_newest_rev(
 
     tags_range = get_smart_tag_range(tags, newest=newest_tag, oldest=oldest_tag)
     if not tags_range:
-        return None, None
+        raise NoCommitsFoundError("Could not find a valid revision range.")
 
     oldest_rev: Optional[str] = tags_range[-1].name
     newest_rev = newest_tag

tests/commands/test_changelog_command.py

@@ -633,6 +633,7 @@ def test_changelog_from_rev_latest_version_from_arg(
 def test_changelog_from_rev_single_version_not_found(
     mocker, config_path, changelog_path
 ):
+    """Provides an invalid revision ID to changelog command"""
     with open(config_path, "a") as f:
         f.write('tag_format = "$version"\n')
 
@@ -657,12 +658,13 @@ def test_changelog_from_rev_single_version_not_found(
     with pytest.raises(NoCommitsFoundError) as excinfo:
         cli.main()
 
-    assert "No commits found" in str(excinfo)
+    assert "Could not find a valid revision" in str(excinfo)
 
 
 @pytest.mark.usefixtures("tmp_commitizen_project")
 @pytest.mark.freeze_time("2022-02-13")
 def test_changelog_from_rev_range_version_not_found(mocker, config_path):
+    """Provides an invalid end revision ID to changelog command"""
     with open(config_path, "a") as f:
         f.write('tag_format = "$version"\n')
 
@@ -684,7 +686,7 @@ def test_changelog_from_rev_range_version_not_found(mocker, config_path):
     with pytest.raises(NoCommitsFoundError) as excinfo:
         cli.main()
 
-    assert "No commits found" in str(excinfo)
+    assert "Could not find a valid revision" in str(excinfo)
 
 
 @pytest.mark.usefixtures("tmp_commitizen_project")