wip: code formatting nits continued

test/escapeRegExp.spec.js

@@ -0,0 +1,27 @@
+import lodashStable from 'lodash';
+import { stubString } from './utils';
+import escapeRegExp from '../src/escapeRegExp';
+
+describe('escapeRegExp', () => {
+    const escaped = '\\^\\$\\.\\*\\+\\?\\(\\)\\[\\]\\{\\}\\|\\\\';
+    const unescaped = '^$.*+?()[]{}|\\';
+
+    it('should escape values', () => {
+        expect(escapeRegExp(unescaped + unescaped)).toBe(escaped + escaped);
+    });
+
+    it('should handle strings with nothing to escape', () => {
+        expect(escapeRegExp('abc')).toBe('abc');
+    });
+
+    it('should return an empty string for empty values', () => {
+        const values = [, null, undefined, ''];
+        const expected = lodashStable.map(values, stubString);
+
+        const actual = lodashStable.map(values, (value, index) =>
+            index ? escapeRegExp(value) : escapeRegExp(),
+        );
+
+        expect(actual).toEqual(expected);
+    });
+});