观看控制台的错误

发布于 2025-02-10 16:53:58 字数 310 浏览 0 评论 0原文

我有一个使用帆布元素的应用程序，该应用程序很难用JavaScript测试，但确实将消息传递给控制台。

我如何观看写在控制台上的错误？

我尝试修补窗户控制台，但它不起作用。

const messages = []

window.console.error = (msg) => {
  messages.push(msg)
})

// actions causing error

expect(messages.length).to.eq(0)

原文

I have an app using canvas elements, which are difficult to test with javascript but it does throw messages to the console.

How can I watch for errors written to the console?

I tried monkey patching the window console, but it's not working.

const messages = []

window.console.error = (msg) => {
  messages.push(msg)
})

// actions causing error

expect(messages.length).to.eq(0)

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喜爱皱眉﹌ 2025-02-17 16:53:58

您可以使用柏树cy.spy（），ref docs

let spy;
Cypress.on('window:before:load', (win) => {
  spy = cy.spy(win.console, "error")  
})

// actions causing error

cy.then(() => {  
  expect(spy).not.to.be.called
})

You can watch console messages with Cypress cy.spy(), ref docs

let spy;
Cypress.on('window:before:load', (win) => {
  spy = cy.spy(win.console, "error")  
})

// actions causing error

cy.then(() => {  
  expect(spy).not.to.be.called
})

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