feat: Add keystrokeDelay (cypress-io#15683)

* Add keystrokeDelay

* Config tests

* Add proper comments

* Add some tests for configuring timeout

* Add tests for false values

* Few additional tests

* Rename test

* feat: add Cypress.Keyboard.defaults() for specifying default keystrokeDelay

* use test-configuration on link

* remove obsolete error message

* fix types and add type tests

* fix types tests

* fix type test

Co-authored-by: Chris Breiding <chrisbreiding@gmail.com>

cli/types/cypress.d.ts

@@ -490,6 +490,13 @@ declare namespace Cypress {
       getElementCoordinatesByPositionRelativeToXY(element: JQuery | HTMLElement, x: number, y: number): ElementPositioning
     }
 
+    /**
+     * @see https://on.cypress.io/keyboard-api
+     */
+     Keyboard: {
+      defaults(options: Partial<KeyboardDefaultsOptions>): void
+    }
+
     /**
      * @see https://on.cypress.io/api/api-server
      */
@@ -2786,6 +2793,7 @@ declare namespace Cypress {
 
   interface TestConfigOverrides extends Partial<Pick<ConfigOptions, 'animationDistanceThreshold' | 'baseUrl' | 'defaultCommandTimeout' | 'env' | 'execTimeout' | 'includeShadowDom' | 'requestTimeout' | 'responseTimeout' | 'retries' | 'scrollBehavior' | 'taskTimeout' | 'viewportHeight' | 'viewportWidth' | 'waitForAnimations'>> {
     browser?: IsBrowserMatcher | IsBrowserMatcher[]
+    keystrokeDelay?: number
   }
 
   /**
@@ -2836,6 +2844,18 @@ declare namespace Cypress {
     env: object
   }
 
+  /**
+   * Options for Cypress.Keyboard.defaults()
+   */
+  interface KeyboardDefaultsOptions {
+    /**
+    * Time, in milliseconds, between each keystroke when typing. (Pass 0 to disable)
+    *
+    * @default 10
+    */
+    keystrokeDelay: number
+  }
+
   /**
    * Full set of possible options for cy.request call
    */

cli/types/tests/cypress-tests.ts

@@ -592,17 +592,19 @@ namespace CypressTestConfigOverridesTests {
     browser: [{name: 'firefox'}, {name: 'chrome'}]
   }, () => {})
   it('test', {
-    browser: 'firefox'
+    browser: 'firefox',
+    keystrokeDelay: 0
   }, () => {})
   it('test', {
-    browser: {foo: 'bar'} // $ExpectError
+    browser: {foo: 'bar'}, // $ExpectError
   }, () => {})
-
   it('test', {
-    retries: null
+    retries: null,
+    keystrokeDelay: 0
   }, () => { })
   it('test', {
-    retries: 3
+    retries: 3,
+    keystrokeDelay: false, // $ExpectError
   }, () => { })
   it('test', {
     retries: {
@@ -631,14 +633,16 @@ namespace CypressTestConfigOverridesTests {
   // set config on a per-suite basis
   describe('suite', {
     browser: {family: 'firefox'},
-    baseUrl: 'www.example.com'
+    baseUrl: 'www.example.com',
+    keystrokeDelay: 0
   }, () => {})
 
   context('suite', {}, () => {})
 
   describe('suite', {
     browser: {family: 'firefox'},
-    baseUrl: 'www.example.com'
+    baseUrl: 'www.example.com',
+    keystrokeDelay: false // $ExpectError
     foo: 'foo' // $ExpectError
   }, () => {})
 
@@ -672,3 +676,18 @@ namespace CypressTaskTests {
     val // $ExpectType unknown
   })
 }
+
+namespace CypressKeyboardTests {
+  Cypress.Keyboard.defaults({
+    keystrokeDelay: 0
+  })
+  Cypress.Keyboard.defaults({
+    keystrokeDelay: 500
+  })
+  Cypress.Keyboard.defaults({
+    keystrokeDelay: false // $ExpectError
+  })
+  Cypress.Keyboard.defaults({
+    delay: 500 // $ExpectError
+  })
+}

packages/driver/cypress/integration/commands/actions/type_spec.js

@@ -639,6 +639,16 @@ describe('src/cy/commands/actions/type - #type', () => {
   })
 
   describe('delay', () => {
+    it('adds default delay to delta for each key sequence', () => {
+      cy.spy(cy, 'timeout')
+
+      cy.get(':text:first')
+      .type('foo{enter}bar{leftarrow}')
+      .then(() => {
+        expect(cy.timeout).to.be.calledWith(10 * 8, true, 'type')
+      })
+    })
+
     it('adds delay to delta for each key sequence', () => {
       cy.spy(cy, 'timeout')
 
@@ -667,6 +677,72 @@ describe('src/cy/commands/actions/type - #type', () => {
 
       cy.get(':text:first').type('foo{enter}bar{leftarrow}')
     })
+
+    it('test config keystrokeDelay overrides global value', { keystrokeDelay: 5 }, () => {
+      cy.spy(cy, 'timeout')
+
+      cy.get(':text:first')
+      .type('foo{enter}bar{leftarrow}')
+      .then(() => {
+        expect(cy.timeout).to.be.calledWith(5 * 8, true, 'type')
+      })
+    })
+
+    it('delay will override default keystrokeDelay', () => {
+      Cypress.Keyboard.defaults({
+        keystrokeDelay: 20,
+      })
+
+      cy.spy(cy, 'timeout')
+
+      cy.get(':text:first')
+      .type('foo{enter}bar{leftarrow}', { delay: 5 })
+      .then(() => {
+        expect(cy.timeout).to.be.calledWith(5 * 8, true, 'type')
+
+        Cypress.Keyboard.reset()
+      })
+    })
+
+    it('delay will override test config keystrokeDelay', { keystrokeDelay: 1000 }, () => {
+      cy.spy(cy, 'timeout')
+
+      cy.get(':text:first')
+      .type('foo{enter}bar{leftarrow}', { delay: 5 })
+      .then(() => {
+        expect(cy.timeout).to.be.calledWith(5 * 8, true, 'type')
+      })
+    })
+
+    it('does not increase the timeout delta when delay is 0', () => {
+      cy.spy(cy, 'timeout')
+
+      cy.get(':text:first').type('foo{enter}', { delay: 0 }).then(() => {
+        expect(cy.timeout).not.to.be.calledWith(0, true, 'type')
+      })
+    })
+
+    describe('errors', () => {
+      it('throws when delay is invalid', (done) => {
+        cy.on('fail', (err) => {
+          expect(err.message).to.eq('`cy.type()` `delay` option must be 0 (zero) or a positive number. You passed: `false`')
+          expect(err.docsUrl).to.equal('https://on.cypress.io/type')
+          done()
+        })
+
+        cy.get(':text:first').type('foo', { delay: false })
+      })
+
+      it('throws when test config keystrokeDelay is invalid', { keystrokeDelay: false }, (done) => {
+        cy.on('fail', (err) => {
+          expect(err.message).to.eq('The test configuration `keystrokeDelay` option must be 0 (zero) or a positive number. You passed: `false`')
+          expect(err.docsUrl).to.equal('https://on.cypress.io/test-configuration')
+          done()
+        })
+
+        cy.get(':text:first').type('foo')
+      })
+    })
   })
 
   describe('events', () => {

packages/driver/cypress/integration/cypress/keyboard_spec.js

@@ -0,0 +1,108 @@
+const { Keyboard } = Cypress
+
+const DEFAULTS = {
+  keystrokeDelay: 10,
+}
+
+describe('src/cypress/keyboard', () => {
+  beforeEach(() => {
+    Keyboard.reset()
+  })
+
+  it('has defaults', () => {
+    expect(Keyboard.getConfig()).to.deep.eq(DEFAULTS)
+  })
+
+  context('.getConfig', () => {
+    it('returns config', () => {
+      expect(Keyboard.getConfig()).to.deep.eq(DEFAULTS)
+    })
+
+    it('does not allow mutation of config', () => {
+      const config = Keyboard.getConfig()
+
+      config.keystrokeDelay = 0
+
+      expect(Keyboard.getConfig().keystrokeDelay).to.eq(DEFAULTS.keystrokeDelay)
+    })
+  })
+
+  context('.defaults', () => {
+    it('is noop if not called with any valid properties', () => {
+      Keyboard.defaults({})
+      expect(Keyboard.getConfig()).to.deep.eq(DEFAULTS)
+    })
+
+    it('sets keystrokeDelay if specified', () => {
+      Keyboard.defaults({
+        keystrokeDelay: 5,
+      })
+
+      expect(Keyboard.getConfig().keystrokeDelay).to.eql(5)
+    })
+
+    it('returns new config', () => {
+      const result = Keyboard.defaults({
+        keystrokeDelay: 5,
+      })
+
+      expect(result).to.deep.eql({
+        keystrokeDelay: 5,
+      })
+    })
+
+    it('does not allow mutation via returned config', () => {
+      const result = Keyboard.defaults({
+        keystrokeDelay: 5,
+      })
+
+      result.keystrokeDelay = 0
+
+      expect(Keyboard.getConfig().keystrokeDelay).to.eq(5)
+    })
+
+    describe('errors', () => {
+      it('throws if not passed an object', () => {
+        const fn = () => {
+          Keyboard.defaults()
+        }
+
+        expect(fn).to.throw()
+        .with.property('message')
+        .and.eq('`Cypress.Keyboard.defaults()` must be called with an object. You passed: ``')
+
+        expect(fn).to.throw()
+        .with.property('docsUrl')
+        .and.eq('https://on.cypress.io/keyboard-api')
+      })
+
+      it('throws if keystrokeDelay is not a number', () => {
+        const fn = () => {
+          Keyboard.defaults({ keystrokeDelay: false })
+        }
+
+        expect(fn).to.throw()
+        .with.property('message')
+        .and.eq('`Cypress.Keyboard.defaults()` `keystrokeDelay` option must be 0 (zero) or a positive number. You passed: `false`')
+
+        expect(fn).to.throw()
+        .with.property('docsUrl')
+        .and.eq('https://on.cypress.io/keyboard-api')
+      })
+
+      it('throws if keystrokeDelay is a negative number', () => {
+        const fn = () => {
+          Keyboard.defaults({ keystrokeDelay: -10 })
+        }
+
+        expect(fn).to.throw()
+        .with.property('message')
+        .and.eq('`Cypress.Keyboard.defaults()` `keystrokeDelay` option must be 0 (zero) or a positive number. You passed: `-10`')
+
+        expect(fn).to.throw()
+        .with.property('docsUrl')
+        .and.eq('https://on.cypress.io/keyboard-api')
+      })
+    })
+  })
+})

packages/driver/src/cy/commands/actions/type.js

@@ -24,7 +24,7 @@ module.exports = function (Commands, Cypress, cy, state, config) {
       log: true,
       verify: true,
       force: false,
-      delay: 10,
+      delay: config('keystrokeDelay') || $Keyboard.getConfig().keystrokeDelay,
       release: true,
       parseSpecialCharSequences: true,
       waitForAnimations: config('waitForAnimations'),
@@ -130,6 +130,30 @@ module.exports = function (Commands, Cypress, cy, state, config) {
       })
     }
 
+    const isInvalidDelay = (delay) => {
+      return delay !== undefined && (!_.isNumber(delay) || delay < 0)
+    }
+
+    if (isInvalidDelay(userOptions.delay)) {
+      $errUtils.throwErrByPath('keyboard.invalid_delay', {
+        onFail: options._log,
+        args: {
+          cmd: 'type',
+          docsPath: 'type',
+          option: 'delay',
+          delay: userOptions.delay,
+        },
+      })
+    }
+
+    // specific error if test config keystrokeDelay is invalid
+    if (isInvalidDelay(config('keystrokeDelay'))) {
+      $errUtils.throwErrByPath('keyboard.invalid_per_test_delay', {
+        onFail: options._log,
+        args: { delay: config('keystrokeDelay') },
+      })
+    }
+
     chars = `${chars}`
 
     const win = state('window')
@@ -282,7 +306,9 @@ module.exports = function (Commands, Cypress, cy, state, config) {
           // for the total number of keys we're about to
           // type, ensure we raise the timeout to account
           // for the delay being added to each keystroke
-          return cy.timeout(totalKeys * options.delay, true, 'type')
+          if (options.delay) {
+            return cy.timeout(totalKeys * options.delay, true, 'type')
+          }
         },
 
         onEvent: updateTable || _.noop,