Add Cypress.io for e2e tests and first ui tests. See #298.

cypress.json

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+{}

cypress/fixtures/example.json

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+{
+  "name": "Using fixtures to represent data",
+  "email": "[email protected]",
+  "body": "Fixtures are a great way to mock data for responses to routes"
+}

cypress/integration/examples/actions.spec.js

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+/// <reference types="cypress" />
+
+context('Actions', () => {
+  beforeEach(() => {
+    cy.visit('https://example.cypress.io/commands/actions')
+  })
+
+  // https://on.cypress.io/interacting-with-elements
+
+  it('.type() - type into a DOM element', () => {
+    // https://on.cypress.io/type
+    cy.get('.action-email')
+      .type('[email protected]').should('have.value', '[email protected]')
+
+      // .type() with special character sequences
+      .type('{leftarrow}{rightarrow}{uparrow}{downarrow}')
+      .type('{del}{selectall}{backspace}')
+
+      // .type() with key modifiers
+      .type('{alt}{option}') //these are equivalent
+      .type('{ctrl}{control}') //these are equivalent
+      .type('{meta}{command}{cmd}') //these are equivalent
+      .type('{shift}')
+
+      // Delay each keypress by 0.1 sec
+      .type('[email protected]', { delay: 100 })
+      .should('have.value', '[email protected]')
+
+    cy.get('.action-disabled')
+      // Ignore error checking prior to type
+      // like whether the input is visible or disabled
+      .type('disabled error checking', { force: true })
+      .should('have.value', 'disabled error checking')
+  })
+
+  it('.focus() - focus on a DOM element', () => {
+    // https://on.cypress.io/focus
+    cy.get('.action-focus').focus()
+      .should('have.class', 'focus')
+      .prev().should('have.attr', 'style', 'color: orange;')
+  })
+
+  it('.blur() - blur off a DOM element', () => {
+    // https://on.cypress.io/blur
+    cy.get('.action-blur').type('About to blur').blur()
+      .should('have.class', 'error')
+      .prev().should('have.attr', 'style', 'color: red;')
+  })
+
+  it('.clear() - clears an input or textarea element', () => {
+    // https://on.cypress.io/clear
+    cy.get('.action-clear').type('Clear this text')
+      .should('have.value', 'Clear this text')
+      .clear()
+      .should('have.value', '')
+  })
+
+  it('.submit() - submit a form', () => {
+    // https://on.cypress.io/submit
+    cy.get('.action-form')
+      .find('[type="text"]').type('HALFOFF')
+
+    cy.get('.action-form').submit()
+      .next().should('contain', 'Your form has been submitted!')
+  })
+
+  it('.click() - click on a DOM element', () => {
+    // https://on.cypress.io/click
+    cy.get('.action-btn').click()
+
+    // You can click on 9 specific positions of an element:
+    //  -----------------------------------
+    // | topLeft        top       topRight |
+    // |                                   |
+    // |                                   |
+    // |                                   |
+    // | left          center        right |
+    // |                                   |
+    // |                                   |
+    // |                                   |
+    // | bottomLeft   bottom   bottomRight |
+    //  -----------------------------------
+
+    // clicking in the center of the element is the default
+    cy.get('#action-canvas').click()
+
+    cy.get('#action-canvas').click('topLeft')
+    cy.get('#action-canvas').click('top')
+    cy.get('#action-canvas').click('topRight')
+    cy.get('#action-canvas').click('left')
+    cy.get('#action-canvas').click('right')
+    cy.get('#action-canvas').click('bottomLeft')
+    cy.get('#action-canvas').click('bottom')
+    cy.get('#action-canvas').click('bottomRight')
+
+    // .click() accepts an x and y coordinate
+    // that controls where the click occurs :)
+
+    cy.get('#action-canvas')
+      .click(80, 75) // click 80px on x coord and 75px on y coord
+      .click(170, 75)
+      .click(80, 165)
+      .click(100, 185)
+      .click(125, 190)
+      .click(150, 185)
+      .click(170, 165)
+
+    // click multiple elements by passing multiple: true
+    cy.get('.action-labels>.label').click({ multiple: true })
+
+    // Ignore error checking prior to clicking
+    cy.get('.action-opacity>.btn').click({ force: true })
+  })
+
+  it('.dblclick() - double click on a DOM element', () => {
+    // https://on.cypress.io/dblclick
+
+    // Our app has a listener on 'dblclick' event in our 'scripts.js'
+    // that hides the div and shows an input on double click
+    cy.get('.action-div').dblclick().should('not.be.visible')
+    cy.get('.action-input-hidden').should('be.visible')
+  })
+
+  it('.rightclick() - right click on a DOM element', () => {
+    // https://on.cypress.io/rightclick
+
+    // Our app has a listener on 'contextmenu' event in our 'scripts.js'
+    // that hides the div and shows an input on right click
+    cy.get('.rightclick-action-div').rightclick().should('not.be.visible')
+    cy.get('.rightclick-action-input-hidden').should('be.visible')
+  })
+
+  it('.check() - check a checkbox or radio element', () => {
+    // https://on.cypress.io/check
+
+    // By default, .check() will check all
+    // matching checkbox or radio elements in succession, one after another
+    cy.get('.action-checkboxes [type="checkbox"]').not('[disabled]')
+      .check().should('be.checked')
+
+    cy.get('.action-radios [type="radio"]').not('[disabled]')
+      .check().should('be.checked')
+
+    // .check() accepts a value argument
+    cy.get('.action-radios [type="radio"]')
+      .check('radio1').should('be.checked')
+
+    // .check() accepts an array of values
+    cy.get('.action-multiple-checkboxes [type="checkbox"]')
+      .check(['checkbox1', 'checkbox2']).should('be.checked')
+
+    // Ignore error checking prior to checking
+    cy.get('.action-checkboxes [disabled]')
+      .check({ force: true }).should('be.checked')
+
+    cy.get('.action-radios [type="radio"]')
+      .check('radio3', { force: true }).should('be.checked')
+  })
+
+  it('.uncheck() - uncheck a checkbox element', () => {
+    // https://on.cypress.io/uncheck
+
+    // By default, .uncheck() will uncheck all matching
+    // checkbox elements in succession, one after another
+    cy.get('.action-check [type="checkbox"]')
+      .not('[disabled]')
+      .uncheck().should('not.be.checked')
+
+    // .uncheck() accepts a value argument
+    cy.get('.action-check [type="checkbox"]')
+      .check('checkbox1')
+      .uncheck('checkbox1').should('not.be.checked')
+
+    // .uncheck() accepts an array of values
+    cy.get('.action-check [type="checkbox"]')
+      .check(['checkbox1', 'checkbox3'])
+      .uncheck(['checkbox1', 'checkbox3']).should('not.be.checked')
+
+    // Ignore error checking prior to unchecking
+    cy.get('.action-check [disabled]')
+      .uncheck({ force: true }).should('not.be.checked')
+  })
+
+  it('.select() - select an option in a <select> element', () => {
+    // https://on.cypress.io/select
+
+    // at first, no option should be selected
+    cy.get('.action-select')
+      .should('have.value', '--Select a fruit--')
+
+    // Select option(s) with matching text content
+    cy.get('.action-select').select('apples')
+    // confirm the apples were selected
+    // note that each value starts with "fr-" in our HTML
+    cy.get('.action-select').should('have.value', 'fr-apples')
+
+    cy.get('.action-select-multiple')
+      .select(['apples', 'oranges', 'bananas'])
+      // when getting multiple values, invoke "val" method first
+      .invoke('val')
+      .should('deep.equal', ['fr-apples', 'fr-oranges', 'fr-bananas'])
+
+    // Select option(s) with matching value
+    cy.get('.action-select').select('fr-bananas')
+      // can attach an assertion right away to the element
+      .should('have.value', 'fr-bananas')
+
+    cy.get('.action-select-multiple')
+      .select(['fr-apples', 'fr-oranges', 'fr-bananas'])
+      .invoke('val')
+      .should('deep.equal', ['fr-apples', 'fr-oranges', 'fr-bananas'])
+
+    // assert the selected values include oranges
+    cy.get('.action-select-multiple')
+      .invoke('val').should('include', 'fr-oranges')
+  })
+
+  it('.scrollIntoView() - scroll an element into view', () => {
+    // https://on.cypress.io/scrollintoview
+
+    // normally all of these buttons are hidden,
+    // because they're not within
+    // the viewable area of their parent
+    // (we need to scroll to see them)
+    cy.get('#scroll-horizontal button')
+      .should('not.be.visible')
+
+    // scroll the button into view, as if the user had scrolled
+    cy.get('#scroll-horizontal button').scrollIntoView()
+      .should('be.visible')
+
+    cy.get('#scroll-vertical button')
+      .should('not.be.visible')
+
+    // Cypress handles the scroll direction needed
+    cy.get('#scroll-vertical button').scrollIntoView()
+      .should('be.visible')
+
+    cy.get('#scroll-both button')
+      .should('not.be.visible')
+
+    // Cypress knows to scroll to the right and down
+    cy.get('#scroll-both button').scrollIntoView()
+      .should('be.visible')
+  })
+
+  it('.trigger() - trigger an event on a DOM element', () => {
+    // https://on.cypress.io/trigger
+
+    // To interact with a range input (slider)
+    // we need to set its value & trigger the
+    // event to signal it changed
+
+    // Here, we invoke jQuery's val() method to set
+    // the value and trigger the 'change' event
+    cy.get('.trigger-input-range')
+      .invoke('val', 25)
+      .trigger('change')
+      .get('input[type=range]').siblings('p')
+      .should('have.text', '25')
+  })
+
+  it('cy.scrollTo() - scroll the window or element to a position', () => {
+    // https://on.cypress.io/scrollTo
+
+    // You can scroll to 9 specific positions of an element:
+    //  -----------------------------------
+    // | topLeft        top       topRight |
+    // |                                   |
+    // |                                   |
+    // |                                   |
+    // | left          center        right |
+    // |                                   |
+    // |                                   |
+    // |                                   |
+    // | bottomLeft   bottom   bottomRight |
+    //  -----------------------------------
+
+    // if you chain .scrollTo() off of cy, we will
+    // scroll the entire window
+    cy.scrollTo('bottom')
+
+    cy.get('#scrollable-horizontal').scrollTo('right')
+
+    // or you can scroll to a specific coordinate:
+    // (x axis, y axis) in pixels
+    cy.get('#scrollable-vertical').scrollTo(250, 250)
+
+    // or you can scroll to a specific percentage
+    // of the (width, height) of the element
+    cy.get('#scrollable-both').scrollTo('75%', '25%')
+
+    // control the easing of the scroll (default is 'swing')
+    cy.get('#scrollable-vertical').scrollTo('center', { easing: 'linear' })
+
+    // control the duration of the scroll (in ms)
+    cy.get('#scrollable-both').scrollTo('center', { duration: 2000 })
+  })
+})

cypress/integration/examples/aliasing.spec.js

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+/// <reference types="cypress" />
+
+context('Aliasing', () => {
+  beforeEach(() => {
+    cy.visit('https://example.cypress.io/commands/aliasing')
+  })
+
+  it('.as() - alias a DOM element for later use', () => {
+    // https://on.cypress.io/as
+
+    // Alias a DOM element for use later
+    // We don't have to traverse to the element
+    // later in our code, we reference it with @
+
+    cy.get('.as-table').find('tbody>tr')
+      .first().find('td').first()
+      .find('button').as('firstBtn')
+
+    // when we reference the alias, we place an
+    // @ in front of its name
+    cy.get('@firstBtn').click()
+
+    cy.get('@firstBtn')
+      .should('have.class', 'btn-success')
+      .and('contain', 'Changed')
+  })
+
+  it('.as() - alias a route for later use', () => {
+    // Alias the route to wait for its response
+    cy.server()
+    cy.route('GET', 'comments/*').as('getComment')
+
+    // we have code that gets a comment when
+    // the button is clicked in scripts.js
+    cy.get('.network-btn').click()
+
+    // https://on.cypress.io/wait
+    cy.wait('@getComment').its('status').should('eq', 200)
+  })
+})