TypeError: Cannot read property 'passes' of undefined

[carrieyummy]

I've installed the latest mocha, mochawesome, cypress etc,but when i run 'npm test',No test report was generated.
package.json:

{
  "name": "cypresstest",
  "version": "1.0.0",
  "main": "index.js",
  "dependencies": {
    "cypress": "^3.1.5"
  },
  "devDependencies": {
    "mocha": "^6.0.1",
    "mochawesome": "^3.1.1",
    "mochawesome-merge": "^1.0.5",
    "mochawesome-report-generator": "^3.1.5"
  },
  "scripts": {
    "cypress:open": "cypress open",
    "test": "cypress run --reporter mochawesome"
  },
  "author": "",
  "license": "ISC",
  "description": ""
}

exception:

TypeError: Cannot read property 'passes' of undefined
    at Spec.Base.epilogue (/Users/tianyawei/Applications/CypressTest/node_modules/mocha/lib/reporters/base.js:318:25)
    at Object.onceWrapper (events.js:316:30)
    at emitOne (events.js:120:20)
    at Runner.emit (events.js:210:7)
    at Reporter.emit (/Users/tianyawei/Library/Caches/Cypress/3.1.5/Cypress.app/Contents/Resources/app/packages/server/lib/reporter.js:239:55)
    at Object.server.startWebsockets.onMocha (/Users/tianyawei/Library/Caches/Cypress/3.1.5/Cypress.app/Contents/Resources/app/packages/server/lib/project.js:296:22)
    at Socket.<anonymous> (/Users/tianyawei/Library/Caches/Cypress/3.1.5/Cypress.app/Contents/Resources/app/packages/server/lib/socket.js:237:36)
    at emitTwo (events.js:125:13)
    at Socket.emit (events.js:213:7)
    at /Users/tianyawei/Library/Caches/Cypress/3.1.5/Cypress.app/Contents/Resources/app/packages/socket/node_modules/socket.io/lib/socket.js:503:12
    at _combinedTickCallback (internal/process/next_tick.js:131:7)
    at process._tickCallback (internal/process/next_tick.js:180:9)

TypeError: Cannot read property 'passes' of undefined
    at Spec.Base.epilogue (/Users/tianyawei/Applications/CypressTest/node_modules/mocha/lib/reporters/base.js:318:25)
    at Object.onceWrapper (events.js:316:30)
    at emitOne (events.js:120:20)
    at Runner.emit (events.js:210:7)
    at Reporter.emit (/Users/tianyawei/Library/Caches/Cypress/3.1.5/Cypress.app/Contents/Resources/app/packages/server/lib/reporter.js:239:55)
    at Object.server.startWebsockets.onMocha (/Users/tianyawei/Library/Caches/Cypress/3.1.5/Cypress.app/Contents/Resources/app/packages/server/lib/project.js:296:22)
    at Socket.<anonymous> (/Users/tianyawei/Library/Caches/Cypress/3.1.5/Cypress.app/Contents/Resources/app/packages/server/lib/socket.js:237:36)
    at emitTwo (events.js:125:13)
    at Socket.emit (events.js:213:7)
    at /Users/tianyawei/Library/Caches/Cypress/3.1.5/Cypress.app/Contents/Resources/app/packages/socket/node_modules/socket.io/lib/socket.js:503:12
    at _combinedTickCallback (internal/process/next_tick.js:131:7)
    at process._tickCallback (internal/process/next_tick.js:180:9)

npm ERR! Test failed.  See above for more details.
tianyaweideMacBook-Pro:CypressTest tianyawei$ 

[adamgruber]

At first glance this seems to be related to changes that were made in mocha 6.0.0. Specifically as part of mochajs/mocha#3458. The reporter continues to work as expected when used directly with mocha, however when used with Cypress it is throwing errors.

I wrote mochawesome to work with mocha and unfortunately Cypress has been known to have issues. I will try to look into this further but cannot guarantee when or if a fix will be released. A temporary workaround would be to install a version of mocha <6.

[carrieyummy]

@adamgruber Thank you~

[YOU54F]

Just fixed this and proposed the following 2 PR's

stanleyhlng/mocha-multi-reporters#58
michaelleeallen/mocha-junit-reporter#80

My branch tracking the changes, with failing builds with mocha 6 pre and post fix is here

https://github.com/YOU54F/cypressio-docker-typescript/pull/15/files

If you do want to move up to mocha 6, you can pull my forked branch in the interim, whilst we wait for the maintainers of the source repo to review/merge/release the PR

    "mocha": "^6.0.0",
    "mocha-junit-reporter": "YOU54F/mocha-junit-reporter#master",
    "mocha-multi-reporters": "YOU54F/mocha-multi-reporters#master",

[YOU54F]

Updated instructions

I've now updated, tested and released updated modules that fix this with mocha 6, but also retains backwards compatibility with mocha 5 and earlier versions.

https://www.npmjs.com/package/cypress-multi-reporters
https://www.npmjs.com/package/mocha-junit-reporters

Example against Mocha 5
Example against Mocha 6

the changes required are minimal

npm i mocha-junit-reporters
npm i cypress-multi-reporters

in reporterOpts.json

{
  "reporterEnabled": "mocha-junit-reporters, mochawesome",
  "mochaJunitReportersReporterOptions": {
    "mochaFile": "cypress/reports/junit/test_results[hash].xml",
    "toConsole": false
  },
  "mochawesomeReporterOptions": {
    "reportDir": "cypress/reports/mocha",
    "quiet": true,
    "overwrite": false,
    "html": false,
    "json": true
  }
} 

in cypress.json

{
  ...
  "reporter": "cypress-multi-reporters",
  "reporterOptions": {
    "configFile": "reporterOpts.json"
  }

See https://github.com/YOU54F/cypress-docker-typescript/pull/22/files

Hopefully the PR's will be merged in the source repo's soon but for now, enjoy

[amitguptagwl]

any update?

[emmonspired]

Any update?

[MrBokeh]

Mocha 5.2.0 won't have this issue, only the latest Mocha 6.x and 7.x are still having this same issue...

[stevenvanryckeghem]

Any news on this matter? Meanwhile Cypress 4.0 has been released and they now require Mocha 7.0.1 (https://docs.cypress.io/guides/references/migration-guide.html#Migrating-to-Cypress-4-0)

[adamgruber]

Just released v5.0.0 to address this. Specifies mocha 7+ as a peer dependency.