feat: include warning when running with invalid config (#9088)

Co-authored-by: Jennifer Shehane <jennifer@cypress.io>

packages/server/__snapshots__/cypress_spec.js

@@ -294,3 +294,10 @@ You passed: nonono
 
 The error was: Cannot read property 'split' of undefined
 `
+
+exports['INVALID_CONFIG_OPTION'] = `
+\`test\` is not a valid configuration option,\`foo\` is not a valid configuration option
+
+https://on.cypress.io/configuration
+
+`

packages/server/lib/cypress.js

@@ -14,8 +14,8 @@ const Promise = require('bluebird')
 const debug = require('debug')('cypress:server:cypress')
 const argsUtils = require('./util/args')
 
-const warning = (code) => {
-  return require('./errors').warning(code)
+const warning = (code, args) => {
+  return require('./errors').warning(code, args)
 }
 
 const exit = (code = 0) => {
@@ -27,6 +27,20 @@ const exit = (code = 0) => {
   return process.exit(code)
 }
 
+const showWarningForInvalidConfig = (options) => {
+  const invalidConfigOptions = require('lodash').keys(options.config).reduce((invalid, option) => {
+    if (!require('./config').getConfigKeys().find((configKey) => configKey === option)) {
+      invalid.push(option)
+    }
+
+    return invalid
+  }, [])
+
+  if (invalidConfigOptions.length && options.invokedFromCli) {
+    return warning('INVALID_CONFIG_OPTION', invalidConfigOptions)
+  }
+}
+
 const exit0 = () => {
   return exit(0)
 }
@@ -115,6 +129,8 @@ module.exports = {
 
     try {
       options = argsUtils.toObject(argv)
+
+      showWarningForInvalidConfig(options)
     } catch (argumentsError) {
       debug('could not parse CLI arguments: %o', argv)
 

packages/server/lib/errors.js

@@ -945,6 +945,12 @@ const getMsgByType = function (type, arg1 = {}, arg2, arg3) {
 
       https://on.cypress.io/test-retries
       `
+    case 'INVALID_CONFIG_OPTION':
+      return stripIndent`\
+        ${arg1.map((arg) => `\`${arg}\` is not a valid configuration option`)}
+        
+        https://on.cypress.io/configuration
+        `
     default:
   }
 }

packages/server/test/integration/cypress_spec.js

@@ -230,6 +230,48 @@ describe('lib/cypress', () => {
     })
   })
 
+  context('invalid config', function () {
+    beforeEach(function () {
+      this.win = {
+        on: sinon.stub(),
+        webContents: {
+          on: sinon.stub(),
+        },
+      }
+
+      sinon.stub(electron.app, 'on').withArgs('ready').yieldsAsync()
+      sinon.stub(Windows, 'open').resolves(this.win)
+    })
+
+    it('shows warning if config is not valid', function () {
+      return cypress.start(['--config=test=false', '--cwd=/foo/bar'])
+      .then(() => {
+        expect(errors.warning).to.be.calledWith('INVALID_CONFIG_OPTION')
+        expect(console.log).to.be.calledWithMatch('`test` is not a valid configuration option')
+        expect(console.log).to.be.calledWithMatch('https://on.cypress.io/configuration')
+      })
+    })
+
+    it('shows warning when multiple config are not valid', function () {
+      return cypress.start(['--config=test=false,foo=bar', '--cwd=/foo/bar'])
+      .then(() => {
+        expect(errors.warning).to.be.calledWith('INVALID_CONFIG_OPTION')
+        expect(console.log).to.be.calledWithMatch('`test` is not a valid configuration option')
+        expect(console.log).to.be.calledWithMatch('`foo` is not a valid configuration option')
+        expect(console.log).to.be.calledWithMatch('https://on.cypress.io/configuration')
+
+        snapshotConsoleLogs('INVALID_CONFIG_OPTION')
+      })
+    })
+
+    it('does not show warning if config is valid', function () {
+      return cypress.start(['--config=trashAssetsBeforeRuns=false'])
+      .then(() => {
+        expect(errors.warning).to.not.be.calledWith('INVALID_CONFIG_OPTION')
+      })
+    })
+  })
+
   context('--get-key', () => {
     it('writes out key and exits on success', function () {
       return Promise.all([