Javascript 如何在jasmine中模拟单元测试按键
我需要对按键时触发的功能进行单元测试Javascript 如何在jasmine中模拟单元测试按键,javascript,jasmine,karma-jasmine,Javascript,Jasmine,Karma Jasmine,我需要对按键时触发的功能进行单元测试 public onKeyDown(event: KeyboardEvent): void { if (event.ctrlKey && event.keyCode === 38) { console.log('increase'); } if (event.ctrlKey && event.keyCode === 40) { console.log('decrease');
public onKeyDown(event: KeyboardEvent): void {
if (event.ctrlKey && event.keyCode === 38) {
console.log('increase');
}
if (event.ctrlKey && event.keyCode === 40) {
console.log('decrease');
}
/* Prevent entering characters */
if (event.keyCode >= 65 && event.keyCode <= 90) {
return;
}
}
public onKeyDown(事件:KeyboardEvent):无效{
if(event.ctrlKey&&event.keyCode==38){
控制台日志(“增加”);
}
if(event.ctrlKey&&event.keyCode==40){
控制台日志(“减少”);
}
/*防止输入字符*/
如果(event.keyCode>=65&&event.keyCode,下面的示例代码显示如何创建、触发和拦截事件
var keyPressed = null;
function keyPress(key) {
var event = document.createEvent('Event');
event.keyCode = key;
event.initEvent('keydown');
document.dispatchEvent(event);
}
document.addEventListener('keydown', function(e){
keyPressed = e.keyCode;
});
keyPress(37)
alert(keyPressed);
下面的示例代码显示了如何创建、触发和拦截事件
var keyPressed = null;
function keyPress(key) {
var event = document.createEvent('Event');
event.keyCode = key;
event.initEvent('keydown');
document.dispatchEvent(event);
}
document.addEventListener('keydown', function(e){
keyPressed = e.keyCode;
});
keyPress(37)
alert(keyPressed);