wip: code formatting nits continued

test/isType-checks.spec.js

@@ -0,0 +1,68 @@
+import lodashStable from 'lodash';
+import { objToString, objectTag, _, xml } from './utils';
+
+describe('isType checks', () => {
+    it('should return `false` for subclassed values', () => {
+        const funcs = [
+            'isArray',
+            'isBoolean',
+            'isDate',
+            'isFunction',
+            'isNumber',
+            'isRegExp',
+            'isString',
+        ];
+
+        lodashStable.each(funcs, (methodName) => {
+            function Foo() {}
+            Foo.prototype = root[methodName.slice(2)].prototype;
+
+            const object = new Foo();
+            if (objToString.call(object) === objectTag) {
+                assert.strictEqual(
+                    _[methodName](object),
+                    false,
+                    `\`_.${methodName}\` returns \`false\``,
+                );
+            }
+        });
+    });
+
+    it('should not error on host objects (test in IE)', () => {
+        const funcs = [
+            'isArguments',
+            'isArray',
+            'isArrayBuffer',
+            'isArrayLike',
+            'isBoolean',
+            'isBuffer',
+            'isDate',
+            'isElement',
+            'isError',
+            'isFinite',
+            'isFunction',
+            'isInteger',
+            'isMap',
+            'isNaN',
+            'isNil',
+            'isNull',
+            'isNumber',
+            'isObject',
+            'isObjectLike',
+            'isRegExp',
+            'isSet',
+            'isSafeInteger',
+            'isString',
+            'isUndefined',
+            'isWeakMap',
+            'isWeakSet',
+        ];
+
+        lodashStable.each(funcs, (methodName) => {
+            if (xml) {
+                _[methodName](xml);
+                expect(true, `\`_.${methodName}\` should not error`);
+            }
+        });
+    });
+});