Wildcard for files not working

[wwarme]

Expected behaviour

Karma recognizes and executes test-files in the directories matched by minimatch path (see config below).

Actual behaviour

After upgrading Karma from 1.5 to 3.0 neither wildcard /*.* nor extglob '/*.+(ts|tsx)' is working. Explicitely linking .ts files does work, doing so with .tsx files does not execute any tests provided in .tsx files. Linking single .tsx-files in the karma conf file array does work though!
Defining a Test.ts and a Test.tsx file in the project root and linking them via /*.(ts|tsx) also does work! More explicitely (paths are equal on files and preprocessors setting):
packages/*/test/**/*.* - not working
packages/*/test/**/*.+(ts|tsx) - not working
packages/*/test/**/*.tsx - not working
packages/*/test/**/*.ts - working, but only executes .ts test-files
packages/core/test/security/SecurityWrapper.tsx - working, but requires explicit definition of all single .tsx test files

Tests execute as expected (if executed).
Test files (.ts and .tsx) are recognized by watcher, thus karma even reruns when changing a .tsx file, but is not executing the tests.

Environment Details

• Karma version (output of karma --version): 3.0.0
• Webpack version: 4.20.1
• node.js version: 8.12.0
• OS: Windows 8.1 Pro
• Relevant part of your karma.config.js file

module.exports = function karmaConfig(config) {
config.set({
    frameworks: ['mocha', 'intl-shim'],
    reporters: ['spec','junit'],
    files: [
        //We need this, otherwise we will get an error, everytime we use "assign" with Redux
        './node_modules/phantomjs-polyfill-object-assign/object-assign-polyfill.js',
        './node_modules/babel-polyfill/browser.js',
        'packages/*/test/**/*.*'
    ],
    preprocessors: {
        'packages/*/test/**/*.*':['webpack','sourcemap']
    },
    browsers: [
        'PhantomJS'
    ],
    port:9888,
    webpack: require('./webpack.test.config.js'),
    junitReporter: {
        outputDir: 'reports/unittests'
    }
});
};

[johnjbarton]

Try investigating with --log-level=DEBUG. Try testing without webpack: does it work then?

[wwarme]

Yeah of course... Thanks for the tipp, investigating with loglevel debug made it. looks Like one of the test files is causing phantomjs to silently stop or crash:
17 10 2018 10:40:21.767:DEBUG [phantomjs.launcher]: TypeError: undefined is not an object (evaluating 'index_1.default.onReset')

Thank you so far, I think this can be closed since not karma related. Sorry for the false alert...