feat: support references-empty rule.(fix #17)

lib/src/ensure.dart

@@ -74,7 +74,7 @@ bool ensureEmpty(dynamic raw) {
  if (raw is String) {
  return raw.isEmpty;
  }
- if (raw is Iterable<String>) {
+ if (raw is Iterable) {
  return raw.isEmpty;
  }
  return false;

lib/src/rules.dart

@@ -36,6 +36,7 @@ Map<String, RuleFunction> get supportedRules => {
  'footer-max-length': maxLengthRule(CommitComponent.footer),
  'footer-max-line-length': maxLineLengthRule(CommitComponent.footer),
  'footer-min-length': minLengthRule(CommitComponent.footer),
+ 'references-empty': emptyRule(CommitComponent.references),
  };
 
 /// Build full stop rule for commit component.

lib/src/types/commit.dart

@@ -53,6 +53,8 @@ class Commit {
  return body as T?;
  case CommitComponent.footer:
  return footer as T?;
+ case CommitComponent.references:
+ return references as T?;
  }
  }
 }
@@ -64,6 +66,7 @@ enum CommitComponent {
  header,
  body,
  footer,
+ references,
 }
 
 /// Commit Note

test/lint_test.dart

@@ -92,6 +92,26 @@ void main() {
  throwsRangeError);
  });
 
+ test('succeds for issue', () async {
+ final result = await lint('somehting #1', {
+ 'references-empty': Rule(
+ severity: RuleSeverity.error,
+ condition: RuleCondition.never,
+ ),
+ });
+ expect(result.valid, true);
+ });
+
+ test('fails for issue', () async {
+ final result = await lint('somehting #1', {
+ 'references-empty': Rule(
+ severity: RuleSeverity.error,
+ condition: RuleCondition.always,
+ ),
+ });
+ expect(result.valid, false);
+ });
+
  test('positive on multi-line body message', () async {
  final message = '''chore(deps): bump commitlint_cli from 0.5.0 to 0.6.0
 Bumps [commitlint_cli](https://github.com/hyiso/commitlint) from 0.5.0 to 0.6.0.