Make WCT reuse browser instance across test runs

[nicojs]

We're using the public api of WCT for the stryker-wct-runner (a plugin to use wct in Stryker): stryker-mutator/stryker-js#1252. Namely the steps file.

We're using it to initialize the test runner and then make a lot of test runs in quick succession. Pseudocode:

await steps.setupOverrides(this.context);
await steps.loadPlugins(this.context);
await steps.configure(this.context);
await steps.prepare(this.context);

while(someCondition){
   // Write changes to the input files
   await steps.runTests(this.context);
   // Read test results
}

This works functionally. However, each time we call runTests a new browser instance is started, which executes the tests and closes the browser. If we enable persistent, the runTests promise never resolves and the "run-end" event is never triggered.

Is there some other way to make WCT reuse the same browser instance for across multiple test runs? Maybe refresh the browser (this is the way Karma works), instead of closing it and opening a new one? I feel comfortable that reusing the same browser instance between runs would at least double the speed of mutation testing web components.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically closed after being marked stale. If you're still facing this problem with the above solution, please comment and we'll reopen!