Test glob with parent directory (#6398)

* Add unit tests that have globs with a parent directory ('../style.css') and paren + wildcard directory ('../**/style.css')

* Add new unit test folder to .prettierignore to prevent those styles from causing a formatter error

.prettierignore

@@ -13,3 +13,5 @@
 scripts/**/*.css
 system-tests/**/*.css
 system-tests/**/*.scss
+# This unit test required a parent directory stucture and therefore is not inside /fixtures/globs
+**/standalone-glob-parent-test/**/*.css

lib/__tests__/standalone-glob-parent-test/folder/another-folder/standalone-glob-parent-wildcard.test.js

@@ -0,0 +1,20 @@
+'use strict';
+
+const standalone = require('../../../../standalone');
+
+it('glob contains a parent directory and ** wildcard', async () => {
+	const { results } = await standalone({
+		files: '../**/sibling-style.css',
+		config: { rules: { 'block-no-empty': true } },
+		cwd: __dirname,
+	});
+
+	expect(results).toHaveLength(1);
+	expect(results[0].errored).toBe(true);
+	expect(results[0].warnings[0]).toEqual(
+		expect.objectContaining({
+			rule: 'block-no-empty',
+			severity: 'error',
+		}),
+	);
+});

lib/__tests__/standalone-glob-parent-test/folder/sibling/sibling-style.css

@@ -0,0 +1 @@
+a {}

lib/__tests__/standalone-glob-parent-test/folder/standalone-glob-parent.test.js

@@ -0,0 +1,20 @@
+'use strict';
+
+const standalone = require('../../../standalone');
+
+it('glob has parent directory', async () => {
+	const { results } = await standalone({
+		files: '../parent-folder-style.css',
+		config: { rules: { 'block-no-empty': true } },
+		cwd: __dirname,
+	});
+
+	expect(results).toHaveLength(1);
+	expect(results[0].errored).toBe(true);
+	expect(results[0].warnings[0]).toEqual(
+		expect.objectContaining({
+			rule: 'block-no-empty',
+			severity: 'error',
+		}),
+	);
+});

lib/__tests__/standalone-glob-parent-test/parent-folder-style.css

@@ -0,0 +1 @@
+a {}