Javascript 测试typescript装饰程序
我有一个简单的修饰符,可以在满足某些条件时触发stopPropagation()或preventDefault()。我已经在我的应用程序中对此进行了测试,我确信装饰程序工作正常。但是,我无法测试decorator,是否触发了上述方法 在执行测试时,我得到以下错误:Javascript 测试typescript装饰程序,javascript,typescript,unit-testing,jasmine,decorator,Javascript,Typescript,Unit Testing,Jasmine,Decorator,我有一个简单的修饰符,可以在满足某些条件时触发stopPropagation()或preventDefault()。我已经在我的应用程序中对此进行了测试,我确信装饰程序工作正常。但是,我无法测试decorator,是否触发了上述方法 在执行测试时,我得到以下错误: Error: Expected spy stopPropagation to have been called. core.decorators.ts export function eventModifier( stopProp
Error: Expected spy stopPropagation to have been called.
core.decorators.ts
export function eventModifier( stopPropagation = false, preventDefault?: boolean ) {
return function (target: any, propertyKey: string, descriptor: PropertyDescriptor) {
const originalMethod = descriptor.value;
descriptor.value = function() {
const context = this;
const mouseEvent: MouseEvent = Array.from( arguments ).find( event => event instanceof MouseEvent );
if ( stopPropagation ) {
mouseEvent.stopPropagation();
}
if ( preventDefault ) {
mouseEvent.preventDefault();
}
originalMethod.apply( context, arguments );
};
return descriptor;
};
}
import { eventModifier } from './core.decorators';
describe('eventModifier decorator', () => {
class TestClass {
@eventModifier( true )
public click( event: MouseEvent ): void {
}
}
it('decorator is defined', function() {
expect( eventModifier ).toBeDefined();
});
it('stopPropagation() should be called', function() {
const testClass = new TestClass();
const ev = new MouseEvent('click')
spyOn( testClass, 'click' );
spyOn( ev, 'stopPropagation' );
testClass.click( <MouseEvent> ev );
expect( testClass.click ).toHaveBeenCalledWith( ev );
expect( ev.stopPropagation ).toHaveBeenCalled();
});
});
core.decorators.spec.ts
export function eventModifier( stopPropagation = false, preventDefault?: boolean ) {
return function (target: any, propertyKey: string, descriptor: PropertyDescriptor) {
const originalMethod = descriptor.value;
descriptor.value = function() {
const context = this;
const mouseEvent: MouseEvent = Array.from( arguments ).find( event => event instanceof MouseEvent );
if ( stopPropagation ) {
mouseEvent.stopPropagation();
}
if ( preventDefault ) {
mouseEvent.preventDefault();
}
originalMethod.apply( context, arguments );
};
return descriptor;
};
}
import { eventModifier } from './core.decorators';
describe('eventModifier decorator', () => {
class TestClass {
@eventModifier( true )
public click( event: MouseEvent ): void {
}
}
it('decorator is defined', function() {
expect( eventModifier ).toBeDefined();
});
it('stopPropagation() should be called', function() {
const testClass = new TestClass();
const ev = new MouseEvent('click')
spyOn( testClass, 'click' );
spyOn( ev, 'stopPropagation' );
testClass.click( <MouseEvent> ev );
expect( testClass.click ).toHaveBeenCalledWith( ev );
expect( ev.stopPropagation ).toHaveBeenCalled();
});
});
从“/core.decorators”导入{eventModifier};
描述('eventModifier decorator',()=>{
类TestClass{
@eventModifier(真)
公共单击(事件:MouseEvent):无效{
}
}
它('定义了decorator',函数(){
expect(eventModifier).tobededefined();
});
它('stopPropagation()应该被调用,'函数(){
const testClass=新的testClass();
const ev=新建鼠标事件('单击')
spyOn(testClass,'click');
间谍(ev,“停止传播”);
单击(ev);
期望(testClass.click).已与(ev)一起调用;
期望(ev.stopPropagation).tohavebeincalled();
});
});
经过几天的失败和考验,我终于明白了。在testClass.click方法上设置spy时,似乎忘记了什么
以下是工作单元测试:
import { eventModifier } from './core.decorators';
describe('eventModifier decorator', () => {
class TestClass {
@eventModifier( true )
public click( event: MouseEvent ): void {
}
}
it('decorator is defined', function() {
expect( eventModifier ).toBeDefined();
});
it('stopPropagation() should be called', function() {
const testClass = new TestClass();
const ev = new MouseEvent('click')
spyOn( testClass, 'click' ).and.callThrough();
spyOn( ev, 'stopPropagation' );
testClass.click( <MouseEvent> ev );
expect( testClass.click ).toHaveBeenCalledWith( ev );
expect( ev.stopPropagation ).toHaveBeenCalled();
});
});
从“/core.decorators”导入{eventModifier};
描述('eventModifier decorator',()=>{
类TestClass{
@eventModifier(真)
公共单击(事件:MouseEvent):无效{
}
}
它('定义了decorator',函数(){
expect(eventModifier).tobededefined();
});
它('stopPropagation()应该被调用,'函数(){
const testClass=新的testClass();
const ev=新建鼠标事件('单击')
spyOn(testClass,'click')。和.callThrough();
间谍(ev,“停止传播”);
单击(ev);
期望(testClass.click).已与(ev)一起调用;
期望(ev.stopPropagation).tohavebeincalled();
});
});
经过几天的失败和考验,我终于明白了。在testClass.click方法上设置spy时,似乎忘记了什么
以下是工作单元测试:
import { eventModifier } from './core.decorators';
describe('eventModifier decorator', () => {
class TestClass {
@eventModifier( true )
public click( event: MouseEvent ): void {
}
}
it('decorator is defined', function() {
expect( eventModifier ).toBeDefined();
});
it('stopPropagation() should be called', function() {
const testClass = new TestClass();
const ev = new MouseEvent('click')
spyOn( testClass, 'click' ).and.callThrough();
spyOn( ev, 'stopPropagation' );
testClass.click( <MouseEvent> ev );
expect( testClass.click ).toHaveBeenCalledWith( ev );
expect( ev.stopPropagation ).toHaveBeenCalled();
});
});
从“/core.decorators”导入{eventModifier};
描述('eventModifier decorator',()=>{
类TestClass{
@eventModifier(真)
公共单击(事件:MouseEvent):无效{
}
}
它('定义了decorator',函数(){
expect(eventModifier).tobededefined();
});
它('stopPropagation()应该被调用,'函数(){
const testClass=新的testClass();
const ev=新建鼠标事件('单击')
spyOn(testClass,'click')。和.callThrough();
间谍(ev,“停止传播”);
单击(ev);
期望(testClass.click).已与(ev)一起调用;
期望(ev.stopPropagation).tohavebeincalled();
});
});