JSCover not capturing the coverage data.

[abhibang]

Using JSCover to capture Java Script coverage of my application. Some brief about my application: Our application is not a pure JS application. It has java components on back end.

Currently JS cover is not collecting the reports with below approaches The application war is hosted on web server (Glassfish).

Approach1: To obtain the JS code coverage I've started JS Cover as specified in manual: java -jar target/dist/JSCover-all.jar -ws --document-root= --report-dir=target

Accessed my application url in http://localhost:8080/jscoverage.html

1. Via opening it in frame, here the first screen of my application does not show up
2. Via opening it in window, here my application opens up but on further navigation, after clicking on store Report, the coverage data is not collected.

Where in the reports have coverage collected for the demo app.

Approach2: Used and modified WebDriverGeneralProxyTest (added my application url and navigation in @Test shouldRunExampleAndStoreResultProgrammatically) present in https://github.com/tntim96/JSCover-samples to collect the coverage data making selenium to do the navigations.

• Modified @Test shouldRunExampleAndStoreResultProgrammatically @Test public void shouldRunExampleAndStoreResultProgrammatically() { deleteJSON("/no-frames"); driver.get("myApplicationUrl"); userLogsInApplication(); doNaviagtion(); ((JavascriptExecutor) driver).executeScript("window.jscoverFinished = false;"); ((JavascriptExecutor) driver).executeScript("jscoverage_report('no-frames', function(){window.jscoverFinished=true;});"); (new WebDriverWait(driver, 10)) .until((ExpectedCondition<Boolean>) d -> (Boolean) ((JavascriptExecutor) driver).executeScript("return window.jscoverFinished;")); verifyCoverage("/no-frames"); }
• selenium script fails to execute the js snippet ((JavascriptExecutor) driver).executeScript("jscoverage_report('no-frames', function(){window.jscoverFinished=true;});");
• And when we comment out the all the js snippet, on teardown report dir does not have reports files.

Please guide me if I'm doing something wrong.

[tntim96]

If you want to gather code coverage while testing your application on Glassfish (or any server) you can't use the server-mode (i.e. -ws switch). That is for serving static test files like Jasmine and QUnit.

You can use proxy-mode, but it doesn't work over SSL, and I generally recommend using file-system mode.

To do this you need to (from the top of my head):

1. Instrument the JS files you want (normally using the HTML5 local storage switch )
2. Start your application with the instrumented JS files replacing the original ones
3. Run your tests
4. Save your coverage data

There's a working example using this technique in https://github.com/tntim96/JSCover/tree/master/examples/localStorage-file-system