wip: code formatting nits continued

test/isIterateeCall.spec.js

@@ -0,0 +1,46 @@
+import { MAX_SAFE_INTEGER } from './utils';
+import _isIterateeCall from '../.internal/isIterateeCall';
+
+describe('isIterateeCall', () => {
+    const array = [1];
+    const func = _isIterateeCall;
+    const object = { a: 1 };
+
+    it('should return `true` for iteratee calls', () => {
+        function Foo() {}
+        Foo.prototype.a = 1;
+
+        if (func) {
+            expect(func(1, 0, array)).toBe(true);
+            expect(func(1, 'a', object)).toBe(true);
+            expect(func(1, 'a', new Foo())).toBe(true);
+        }
+    });
+
+    it('should return `false` for non-iteratee calls', () => {
+        if (func) {
+            expect(func(2, 0, array)).toBe(false);
+            expect(func(1, 1.1, array)).toBe(false);
+            expect(func(1, 0, { length: MAX_SAFE_INTEGER + 1 })).toBe(false);
+            expect(func(1, 'b', object)).toBe(false);
+        }
+    });
+
+    it('should work with `NaN` values', () => {
+        if (func) {
+            expect(func(NaN, 0, [NaN])).toBe(true);
+            expect(func(NaN, 'a', { a: NaN })).toBe(true);
+        }
+    });
+
+    it('should not error when `index` is an object without a `toString` method', () => {
+        if (func) {
+            try {
+                var actual = func(1, { toString: null }, [1]);
+            } catch (e) {
+                var message = e.message;
+            }
+            expect(actual, false).toBe(message || '');
+        }
+    });
+});