fix: failing sentence-case for subjects with slashes (#574)

* test(ensure): add failing subject-slash scenario for sentence-case

* refactor(ensure): remove special slash delimiter code

* feat(rules): add special scope segments to scope case rule

@commitlint/ensure/src/case.js

@@ -9,13 +9,7 @@ function ensureCase(raw = '', target = 'lowercase') {
 		.replace(/`.*?`|".*?"|'.*?'/g, '')
 		.trim();
 
-	const delimiters = /(\/|\\)/g;
-	const transformed = input
-		.split(delimiters)
-		.map(segment =>
-			delimiters.test(segment) ? segment : toCase(segment, target)
-		)
-		.join('');
+	const transformed = toCase(input, target);
 
 	if (transformed === '' || transformed.match(/^\d/)) {
 		return true;

@commitlint/ensure/src/case.test.js

@@ -110,11 +110,6 @@ test('true for * on pascal-case', t => {
 	t.is(actual, true);
 });
 
-test('true for Modules/Graph on pascal-case', t => {
-	const actual = ensure('Modules/Graph', 'pascal-case');
-	t.is(actual, true);
-});
-
 test('true for * on start-case', t => {
 	const actual = ensure('*', 'start-case');
 	t.is(actual, true);

@commitlint/rules/src/scope-case.js

@@ -20,8 +20,16 @@ export default (parsed, when, value) => {
 		return check;
 	});
 
+	// Scopes may contain slash-delimiters to separate them and mark them as individual segments.
+	// This means that each of these segments should be tested separately with `ensure`.
+	const delimiters = /(\/|\\)/g;
+	const scopeSegments = scope.split(delimiters);
+
 	const result = checks.some(check => {
-		const r = ensure.case(scope, check.case);
+		const r = scopeSegments.every(
+			segment => delimiters.test(segment) || ensure.case(segment, check.case)
+		);
+
 		return negated(check.when) ? !r : r;
 	});
 

@commitlint/rules/src/scope-case.test.js

@@ -308,3 +308,17 @@ test('with uppercase scope should fail for "never [uppercase, lowercase]"', asyn
 	const expected = false;
 	t.is(actual, expected);
 });
+
+test('with slash in scope should succeed for "always pascal-case"', async t => {
+	const commit = await parse('feat(Modules/Graph): add Pie Chart');
+	const [actual] = scopeCase(commit, 'always', 'pascal-case');
+	const expected = true;
+	t.is(actual, expected);
+});
+
+test('with slash in subject should succeed for "always sentence case"', async t => {
+	const commit = await parse('chore: Update @angular/core');
+	const [actual] = scopeCase(commit, 'always', 'sentencecase');
+	const expected = true;
+	t.is(actual, expected);
+});