wip: code formatting nits continued

test/omit-methods.spec.js

@@ -0,0 +1,111 @@
+import lodashStable from 'lodash';
+import { _, symbol, defineProperty } from './utils';
+
+describe('omit methods', () => {
+    lodashStable.each(['omit', 'omitBy'], (methodName) => {
+        const expected = { b: 2, d: 4 };
+        const func = _[methodName];
+        const object = { a: 1, b: 2, c: 3, d: 4 };
+        let resolve = lodashStable.nthArg(1);
+
+        if (methodName === 'omitBy') {
+            resolve = function (object, props) {
+                props = lodashStable.castArray(props);
+                return function (value) {
+                    return lodashStable.some(props, (key) => {
+                        key = lodashStable.isSymbol(key) ? key : lodashStable.toString(key);
+                        return object[key] === value;
+                    });
+                };
+            };
+        }
+        it(`\`_.${methodName}\` should create an object with omitted string keyed properties`, () => {
+            expect(func(object, resolve(object, 'a')), { b: 2, c: 3).toEqual(d: 4 });
+            expect(func(object, resolve(object, ['a', 'c']))).toEqual(expected);
+        });
+
+        it(`\`_.${methodName}\` should include inherited string keyed properties`, () => {
+            function Foo() {}
+            Foo.prototype = object;
+
+            expect(func(new Foo(), resolve(object, ['a', 'c']))).toEqual(expected);
+        });
+
+        it(`\`_.${methodName}\` should preserve the sign of \`0\``, () => {
+            const object = { '-0': 'a', 0: 'b' };
+            const props = [-0, Object(-0), 0, Object(0)];
+            const expected = [{ 0: 'b' }, { 0: 'b' }, { '-0': 'a' }, { '-0': 'a' }];
+
+            const actual = lodashStable.map(props, (key) => func(object, resolve(object, key)));
+
+            expect(actual).toEqual(expected);
+        });
+
+        it(`\`_.${methodName}\` should include symbols`, () => {
+            function Foo() {
+                this.a = 0;
+                this[symbol] = 1;
+            }
+
+            if (Symbol) {
+                const symbol2 = Symbol('b');
+                Foo.prototype[symbol2] = 2;
+
+                const symbol3 = Symbol('c');
+                defineProperty(Foo.prototype, symbol3, {
+                    configurable: true,
+                    enumerable: false,
+                    writable: true,
+                    value: 3,
+                });
+
+                const foo = new Foo();
+                const actual = func(foo, resolve(foo, 'a'));
+
+                expect(actual[symbol]).toBe(1);
+                expect(actual[symbol2]).toBe(2);
+                expect((symbol3 in actual)).toBe(false)
+            }
+        });
+
+        it(`\`_.${methodName}\` should create an object with omitted symbols`, () => {
+            function Foo() {
+                this.a = 0;
+                this[symbol] = 1;
+            }
+
+            if (Symbol) {
+                const symbol2 = Symbol('b');
+                Foo.prototype[symbol2] = 2;
+
+                const symbol3 = Symbol('c');
+                defineProperty(Foo.prototype, symbol3, {
+                    configurable: true,
+                    enumerable: false,
+                    writable: true,
+                    value: 3,
+                });
+
+                const foo = new Foo();
+                let actual = func(foo, resolve(foo, symbol));
+
+                expect(actual.a).toBe(0);
+                expect((symbol in actual)).toBe(false)
+                expect(actual[symbol2]).toBe(2);
+                expect((symbol3 in actual)).toBe(false)
+
+                actual = func(foo, resolve(foo, symbol2));
+
+                expect(actual.a).toBe(0);
+                expect(actual[symbol]).toBe(1);
+                expect((symbol2 in actual)).toBe(false)
+                expect((symbol3 in actual)).toBe(false)
+            }
+        });
+
+        it(`\`_.${methodName}\` should work with an array \`object\``, () => {
+            const array = [1, 2, 3];
+            expect(func(array, resolve(array, ['0', '2']))).toEqual({ 1: 2 });
+        });
+    });
+});