wip: code formatting nits continued

test/isTypedArray.spec.js

@@ -0,0 +1,53 @@
+import lodashStable from 'lodash';
+import { typedArrays, falsey, stubFalse, args, slice, symbol, realm } from './utils';
+import isTypedArray from '../src/isTypedArray';
+
+describe('isTypedArray', () => {
+    it('should return `true` for typed arrays', () => {
+        const expected = lodashStable.map(typedArrays, (type) => type in root);
+
+        const actual = lodashStable.map(typedArrays, (type) => {
+            const Ctor = root[type];
+            return Ctor ? isTypedArray(new Ctor(new ArrayBuffer(8))) : false;
+        });
+
+        expect(actual).toEqual(expected);
+    });
+
+    it('should return `false` for non typed arrays', () => {
+        const expected = lodashStable.map(falsey, stubFalse);
+
+        const actual = lodashStable.map(falsey, (value, index) =>
+            index ? isTypedArray(value) : isTypedArray(),
+        );
+
+        expect(actual).toEqual(expected);
+
+        expect(isTypedArray(args)).toBe(false);
+        expect(isTypedArray([1, 2, 3])).toBe(false);
+        expect(isTypedArray(true)).toBe(false);
+        expect(isTypedArray(new Date())).toBe(false);
+        expect(isTypedArray(new Error())).toBe(false);
+        expect(isTypedArray(slice)).toBe(false);
+        expect(isTypedArray({ a: 1 })).toBe(false);
+        expect(isTypedArray(1)).toBe(false);
+        expect(isTypedArray(/x/)).toBe(false);
+        expect(isTypedArray('a')).toBe(false);
+        expect(isTypedArray(symbol)).toBe(false);
+    });
+
+    it('should work with typed arrays from another realm', () => {
+        if (realm.object) {
+            const props = lodashStable.invokeMap(typedArrays, 'toLowerCase');
+
+            const expected = lodashStable.map(props, (key) => realm[key] !== undefined);
+
+            const actual = lodashStable.map(props, (key) => {
+                const value = realm[key];
+                return value ? isTypedArray(value) : false;
+            });
+
+            expect(actual).toEqual(expected);
+        }
+    });
+});