在click_spec.coffee 上查看赛普拉斯测试。
it "throws when a non-descendent element is covering subject", (done) ->
$btn = $("<button>button covered</button>")
.attr("id", "button-covered-in-span")
.prependTo(cy.$$("body"))
span = $("<span>span on button</span>")
.css(position: "absolute",
left: $btn.offset().left,
top: $btn.offset().top,
padding: 5, display: "inline-block",
backgroundColor: "yellow")
.prependTo(cy.$$("body"))
cy.on "fail", (err) =>
...
expect(err.message).to.include "cy.click() failed because this element"
expect(err.message).to.include "is being covered by another element"
...
done()
cy.get("#button-covered-in-span").click()
最简单的方法是模仿这个测试,尽管文档建议只使用cy.on('fail') 进行调试。
这类似于使用expect().to.throw() 来检查异常是否按预期发生的单元测试,所以我觉得这里的模式是合理的。
为了彻底,我会打电话给click({force: true})。
it('should fail the click() because element is covered', (done) => {
// Check that click succeeds when forced
cy.get('button').click({ force: true })
// Use once() binding for just this fail
cy.once('fail', (err) => {
// Capturing the fail event swallows it and lets the test succeed
// Now look for the expected messages
expect(err.message).to.include('cy.click() failed because this element');
expect(err.message).to.include('is being covered by another element');
done();
});
cy.get("#button-covered-in-span").click().then(x => {
// Only here if click succeeds (so test fails)
done(new Error('Expected button NOT to be clickable, but click() succeeded'));
})
})
作为自定义命令
我不确定如何制作您要求的 chai 扩展,但逻辑可以包含在自定义命令中
/cypress/support/index.js
Cypress.Commands.add("isNotActionable", function(selector, done) {
cy.get(selector).click({ force: true })
cy.once('fail', (err) => {
expect(err.message).to.include('cy.click() failed because this element');
expect(err.message).to.include('is being covered by another element');
done();
});
cy.get(selector).click().then(x => {
done(new Error('Expected element NOT to be clickable, but click() succeeded'));
})
})
/cypress/integration/myTest.spec.js
it('should fail the click() because element is covered', (done) => {
cy.isNotActionable('button', done)
});
注意
我期待done() 在测试前提(即按钮被覆盖)为假时超时。
这不会发生(原因未知),但通过将.then() 链接到第二次点击允许调用done() 并显示错误消息。只有点击成功时才会调用then() 回调,否则cy.once('fail') 回调会处理点击失败(根据赛普拉斯自己的测试)。