https://github.com/angular/angular
Tip revision: 074266b896496ec0ddf078a065e7dd16ba4ab7a4 authored by atscott on 15 April 2020, 23:09:35 UTC
release: cut the v10.0.0-next.2 release
release: cut the v10.0.0-next.2 release
Tip revision: 074266b
metadata_overrider_spec.ts
/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {MetadataOverrider} from '@angular/platform-browser-dynamic/testing/src/metadata_overrider';
import {expect} from '@angular/platform-browser/testing/src/matchers';
interface SomeMetadataType {
plainProp?: string;
getterProp?: string;
arrayProp?: any[];
}
interface OtherMetadataType extends SomeMetadataType {
otherPlainProp?: string;
}
class SomeMetadata implements SomeMetadataType {
plainProp: string;
private _getterProp: string;
arrayProp: any[];
constructor(options: SomeMetadataType) {
this.plainProp = options.plainProp!;
this._getterProp = options.getterProp!;
this.arrayProp = options.arrayProp!;
Object.defineProperty(this, 'getterProp', {
enumerable: true, // getters are non-enumerable by default in es2015
get: () => this._getterProp,
});
}
}
class OtherMetadata extends SomeMetadata implements OtherMetadataType {
otherPlainProp: string;
constructor(options: OtherMetadataType) {
super({
plainProp: options.plainProp,
getterProp: options.getterProp,
arrayProp: options.arrayProp
});
this.otherPlainProp = options.otherPlainProp!;
}
}
{
describe('metadata overrider', () => {
let overrider: MetadataOverrider;
beforeEach(() => {
overrider = new MetadataOverrider();
});
it('should return a new instance with the same values', () => {
const oldInstance = new SomeMetadata({plainProp: 'somePlainProp', getterProp: 'someInput'});
const newInstance = overrider.overrideMetadata(SomeMetadata, oldInstance, {});
expect(newInstance).not.toBe(oldInstance);
expect(newInstance).toBeAnInstanceOf(SomeMetadata);
expect(newInstance).toEqual(oldInstance);
});
it('should set individual properties and keep others', () => {
const oldInstance =
new SomeMetadata({plainProp: 'somePlainProp', getterProp: 'someGetterProp'});
const newInstance =
overrider.overrideMetadata(SomeMetadata, oldInstance, {set: {plainProp: 'newPlainProp'}});
expect(newInstance)
.toEqual(new SomeMetadata({plainProp: 'newPlainProp', getterProp: 'someGetterProp'}));
});
describe('add properties', () => {
it('should replace non array values', () => {
const oldInstance =
new SomeMetadata({plainProp: 'somePlainProp', getterProp: 'someGetterProp'});
const newInstance = overrider.overrideMetadata(
SomeMetadata, oldInstance, {add: {plainProp: 'newPlainProp'}});
expect(newInstance)
.toEqual(new SomeMetadata({plainProp: 'newPlainProp', getterProp: 'someGetterProp'}));
});
it('should add to array values', () => {
const oldInstance = new SomeMetadata({arrayProp: ['a']});
const newInstance =
overrider.overrideMetadata(SomeMetadata, oldInstance, {add: {arrayProp: ['b']}});
expect(newInstance).toEqual(new SomeMetadata({arrayProp: ['a', 'b']}));
});
});
describe('remove', () => {
it('should set values to undefined if their value matches', () => {
const oldInstance =
new SomeMetadata({plainProp: 'somePlainProp', getterProp: 'someGetterProp'});
const newInstance = overrider.overrideMetadata(
SomeMetadata, oldInstance, {remove: {plainProp: 'somePlainProp'}});
expect(newInstance)
.toEqual(new SomeMetadata({plainProp: undefined, getterProp: 'someGetterProp'}));
});
it('should leave values if their value does not match', () => {
const oldInstance =
new SomeMetadata({plainProp: 'somePlainProp', getterProp: 'someGetterProp'});
const newInstance = overrider.overrideMetadata(
SomeMetadata, oldInstance, {remove: {plainProp: 'newPlainProp'}});
expect(newInstance)
.toEqual(new SomeMetadata({plainProp: 'somePlainProp', getterProp: 'someGetterProp'}));
});
it('should remove a value from an array', () => {
const oldInstance =
new SomeMetadata({arrayProp: ['a', 'b', 'c'], getterProp: 'someGetterProp'});
const newInstance = overrider.overrideMetadata(
SomeMetadata, oldInstance, {remove: {arrayProp: ['a', 'c']}});
expect(newInstance)
.toEqual(new SomeMetadata({arrayProp: ['b'], getterProp: 'someGetterProp'}));
});
it('should support types as values', () => {
class Class1 {}
class Class2 {}
class Class3 {}
const instance1 = new SomeMetadata({arrayProp: [Class1, Class2, Class3]});
const instance2 =
overrider.overrideMetadata(SomeMetadata, instance1, {remove: {arrayProp: [Class1]}});
expect(instance2).toEqual(new SomeMetadata({arrayProp: [Class2, Class3]}));
const instance3 =
overrider.overrideMetadata(SomeMetadata, instance2, {remove: {arrayProp: [Class3]}});
expect(instance3).toEqual(new SomeMetadata({arrayProp: [Class2]}));
});
});
describe('subclasses', () => {
it('should set individual properties and keep others', () => {
const oldInstance = new OtherMetadata({
plainProp: 'somePlainProp',
getterProp: 'someGetterProp',
otherPlainProp: 'newOtherProp'
});
const newInstance = overrider.overrideMetadata(
OtherMetadata, oldInstance, {set: {plainProp: 'newPlainProp'}});
expect(newInstance).toEqual(new OtherMetadata({
plainProp: 'newPlainProp',
getterProp: 'someGetterProp',
otherPlainProp: 'newOtherProp'
}));
});
});
});
}