Error during loading "stryker-jest-runner" plugin

[Fenntasy]

Hi, I don't know how to make it work with a simple test (a greet function) with jest.

I created a repo with my error mutant-testing if you want to test it. Jest works, I tried to apply the tip given by the error to reinstall the jest-runner to no avail. I also tried with node 6.10.0 and npm 3.10.10 to be sure that it was not an effect of a too recent version.

Here is the error I get

❯ npm run stryker

> mutant-testing@1.0.0 stryker /Users/fenn/Workspace/fewlines/tests-sparta/mutant-testing
> stryker run stryker.conf.js

[2017-08-10 18:02:18.873] [WARN] PluginLoader - Error during loading "stryker-jest-runner" plugin:
  Cannot find module 'jest-cli/build/runTest'
[2017-08-10 18:02:18.889] [INFO] InputFileResolver - Found 1 of 2 file(s) to be mutated.
[2017-08-10 18:02:18.890] [INFO] SandboxCoordinator - Starting initial test run. This may take a while.
[2017-08-10 18:02:19.173] [ERROR] IsolatedTestRunnerAdapter - /Users/fenn/Workspace/fewlines/tests-sparta/mutant-testing/node_modules/stryker-api/src/core/Factory.js:43
            throw new Error("Could not find a " + this.factoryName + " with name " + name + ", did you install it correctly (for example: npm install --save-dev " + this.importSuggestion(name) + ")?");
            ^

Error: Could not find a testrunner with name jest, did you install it correctly (for example: npm install --save-dev stryker-jest-runner)?
    at TestRunnerFactory.Factory.create (/Users/fenn/Workspace/fewlines/tests-sparta/mutant-testing/node_modules/stryker-api/src/core/Factory.js:43:19)
    at IsolatedTestRunnerAdapterWorker.start (/Users/fenn/Workspace/fewlines/tests-sparta/mutant-testing/node_modules/stryker/src/isolated-runner/IsolatedTestRunnerAdapterWorker.js:42:80)
    at process.<anonymous> (/Users/fenn/Workspace/fewlines/tests-sparta/mutant-testing/node_modules/stryker/src/isolated-runner/IsolatedTestRunnerAdapterWorker.js:19:27)
    at emitTwo (events.js:106:13)
    at process.emit (events.js:191:7)
    at process.nextTick (internal/child_process.js:744:12)
    at _combinedTickCallback (internal/process/next_tick.js:67:7)
    at process._tickCallback (internal/process/next_tick.js:98:9)

[2017-08-10 18:02:19.178] [ERROR] IsolatedTestRunnerAdapter - Child process exited with non-zero exit code 1. Last 10 message from the child process were:
	[2017-08-10 18:02:19.068] [DEBUG] PluginLoader - Loading stryker-* from /Users/fenn/Workspace/fewlines/tests-sparta/mutant-testing/node_modules

	[2017-08-10 18:02:19.073] [DEBUG] PluginLoader - Loading plugins stryker-jasmine (matched with expression stryker-*)

	[2017-08-10 18:02:19.074] [DEBUG] PluginLoader - Loading plugins stryker-jest-runner (matched with expression stryker-*)

	[2017-08-10 18:02:19.074] [DEBUG] PluginLoader - Loading plugins stryker-jasmine

	[2017-08-10 18:02:19.075] [DEBUG] PluginLoader - Loading plugins stryker-jest-runner

	[2017-08-10 18:02:19.171] [WARN] PluginLoader - Error during loading "stryker-jest-runner" plugin:
  Cannot find module 'jest-cli/build/runTest'

	[2017-08-10 18:02:19.171] [DEBUG] IsolatedTestRunnerAdapterWorker - Changing current working directory for this process to /Users/fenn/Workspace/fewlines/tests-sparta/mutant-testing/.stryker-tmp/3908955/sandbox8813052

[2017-08-10 18:02:19.179] [ERROR] stryker-cli - an error occurred Test runner child process exited with non-zero exit code 1

Could you point me to the right direction?

[nicojs]

Hi Fenntasy, thanks for trying out Stryker.

It seems that the stryker-jest-runner has troubles loading:

[2017-08-10 18:22:49.581] [WARN] PluginLoader - Error during loading "stryker-jest-runner" plugin:
  Cannot find module 'jest-cli/build/runTest'

After installing jest-cli npm i jest-cli i got this error:

[2017-08-10 18:49:26.685] [ERROR] IsolatedTestRunnerAdapter - (node:17004) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): TypeError: Runtime.createHasteContext is not a function

Apparently, stryker-jest-runner does not support the current version of jest. I've created issue#15 for this. @mthmulders could you take a look at this?

Downgrading to jest@18 works:

npm i jest@18 jest-cli@18
npm run stryker

[2017-08-10 18:46:57.769] [INFO] ConfigReader - Using stryker.conf.js in the current working directory.
[2017-08-10 18:46:57.893] [INFO] InputFileResolver - Found 1 of 2 file(s) to be mutated.
[2017-08-10 18:46:57.894] [INFO] SandboxCoordinator - Starting initial test run. This may take a while.
[2017-08-10 18:46:59.271] [INFO] Stryker - Initial test run succeeded. Ran 1 tests in 1 second.
[2017-08-10 18:46:59.280] [INFO] Stryker - 1 Mutant(s) generated
[2017-08-10 18:46:59.281] [WARN] MutantTestMatcher - No coverage result found, even though coverageAnalysis is "perTest". Assuming that all tests cover each mutant. This might have a big impact on the performance.
[2017-08-10 18:46:59.286] [INFO] SandboxCoordinator - Creating 8 test runners (based on CPU count)
Mutation testing  [] 100% (ETC 0.0s)[1 killed] [0 survived] [0 no coverage] [0 timeout] [0 error]

Ran 1.00 tests per mutant on average.
----------|---------|----------|-----------|------------|----------|---------|
File      | % score | # killed | # timeout | # survived | # no cov | # error |
----------|---------|----------|-----------|------------|----------|---------|
All files |  100.00 |        1 |         0 |          0 |        0 |       0 |
----------|---------|----------|-----------|------------|----------|---------|
[2017-08-10 18:47:01.662] [INFO] Stryker - Done in 3 seconds.

[Fenntasy]

Thank you for the input, apparently downgrading to Jest 19 also works.

As the problem lies with the runner, I'm closing the issue :)