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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| /// <reference types="cypress" /> | ||
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| describe('cy.on', () => { | ||
| // these test handles every "window" object | ||
| // by attaching the stub whenever any window is created | ||
| // https://on.cypress.io/catalog-of-events | ||
| it('works', () => { | ||
| // there is no "window.track" yet, | ||
| // thus we cannot stub just yet | ||
| let track // the real track when set by the app | ||
| let trackStub // our stub around the real track | ||
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| // use "cy.on" to prepare for "window.track" assignment | ||
| // this code runs for every window creation, thus we | ||
| // can track events from the "cy.reload()" | ||
| cy.on('window:before:load', (win) => { | ||
| Object.defineProperty(win, 'track', { | ||
| get() { | ||
| return trackStub | ||
| }, | ||
| set(fn) { | ||
| // if the stub does not exist yet, create it | ||
| if (!track) { | ||
| track = fn | ||
| // give the created stub an alias so we can retrieve it later | ||
| trackStub = cy.stub().callsFake(track).as('track') | ||
| } | ||
| } | ||
| }) | ||
| }) | ||
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| cy.visit('/') | ||
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| // make sure the page called the "window.track" with expected arguments | ||
| cy.get('@track').should('have.been.calledOnceWith', 'window.load') | ||
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| cy.reload() | ||
| cy.reload() | ||
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| cy.get('@track') | ||
| .should('have.been.calledThrice') | ||
| // confirm every call was with "window.load" argument | ||
| .invoke('getCalls') | ||
| .should((calls) => { | ||
| calls.forEach((trackCall, k) => { | ||
| expect(trackCall.args, `call ${k + 1}`).to.deep.equal(['window.load']) | ||
| }) | ||
| }) | ||
| }) | ||
| }) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| /// <reference types="cypress" /> | ||
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| // variable that will hold cy.stub created in the test | ||
| let stub | ||
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| // use Cypress.on in its own spec to avoid every test running it | ||
| // https://on.cypress.io/catalog-of-events | ||
| Cypress.on('window:before:load', (win) => { | ||
| // if the test has prepared a stub | ||
| if (stub) { | ||
| // the stub function is ready | ||
| // always returns it when the application | ||
| // is trying to use "window.track" | ||
| Object.defineProperty(win, 'track', { | ||
| get() { | ||
| return stub | ||
| } | ||
| }) | ||
| } | ||
| }) | ||
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| describe('Cypress.on', () => { | ||
| beforeEach(() => { | ||
| // let the test create the stub if it needs it | ||
| stub = null | ||
| }) | ||
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| it('works', () => { | ||
| // note: cy.stub returns a function | ||
| stub = cy.stub().as('track') | ||
| cy.visit('/') | ||
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| // make sure the page called the "window.track" with expected arguments | ||
| cy.get('@track').should('have.been.calledOnceWith', 'window.load') | ||
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| cy.reload() | ||
| cy.reload() | ||
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| cy.get('@track') | ||
| .should('have.been.calledThrice') | ||
| // confirm every call was with "window.load" argument | ||
| .invoke('getCalls') | ||
| .should((calls) => { | ||
| calls.forEach((trackCall, k) => { | ||
| expect(trackCall.args, `call ${k + 1}`).to.deep.equal(['window.load']) | ||
| }) | ||
| }) | ||
| }) | ||
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| it('works with reset', () => { | ||
| stub = cy.stub().as('track') | ||
| cy.visit('/') | ||
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| // make sure the page called the "window.track" with expected arguments | ||
| cy.get('@track') | ||
| .should('have.been.calledOnceWith', 'window.load') | ||
| // cy.stub().reset() brings the counts back to 0 | ||
| .invoke('reset') | ||
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| cy.reload() | ||
| cy.reload() | ||
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| cy.get('@track').should('have.been.calledTwice') | ||
| }) | ||
| }) |
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