wip: code formatting nits continued

test/isString.spec.js

@@ -0,0 +1,37 @@
+import lodashStable from 'lodash';
+import { falsey, args, slice, symbol, realm } from './utils';
+import isString from '../src/isString';
+
+describe('isString', () => {
+    it('should return `true` for strings', () => {
+        expect(isString('a')).toBe(true);
+        expect(isString(Object('a'))).toBe(true);
+    });
+
+    it('should return `false` for non-strings', () => {
+        const expected = lodashStable.map(falsey, (value) => value === '');
+
+        const actual = lodashStable.map(falsey, (value, index) =>
+            index ? isString(value) : isString(),
+        );
+
+        expect(actual).toEqual(expected);
+
+        expect(isString(args)).toBe(false);
+        expect(isString([1, 2, 3])).toBe(false);
+        expect(isString(true)).toBe(false);
+        expect(isString(new Date())).toBe(false);
+        expect(isString(new Error())).toBe(false);
+        expect(isString(slice)).toBe(false);
+        expect(isString({ 0: 1, length: 1 })).toBe(false);
+        expect(isString(1)).toBe(false);
+        expect(isString(/x/)).toBe(false);
+        expect(isString(symbol)).toBe(false);
+    });
+
+    it('should work with strings from another realm', () => {
+        if (realm.string) {
+            expect(isString(realm.string)).toBe(true);
+        }
+    });
+});