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squoosh/karma.conf.js
2018-05-29 23:11:43 +01:00

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const fs = require("fs");
function readJsonFile(path) {
// TypeScript puts lots of comments in the default `tsconfig.json`, so you
// cant use `require()` to read it. Hence this hack.
return eval("(" + fs.readFileSync(path).toString("utf-8") + ")");
}
const typeScriptConfig = readJsonFile("./tsconfig.json");
const babel = readJsonFile("./.babelrc");
module.exports = function(config) {
const options = {
// base path that will be used to resolve all patterns (eg. files, exclude)
basePath: "",
// frameworks to use
// available frameworks: https://npmjs.org/browse/keyword/karma-adapter
frameworks: ["mocha", "chai", "karma-typescript"],
// list of files / patterns to load in the browser
files: [
{
pattern: "test/**/*.ts",
type: "module"
},
{
pattern: "src/**/*.ts",
included: false
}
],
// list of files / patterns to exclude
exclude: [],
// preprocess matching files before serving them to the browser // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
preprocessors: {
"src/**/*.ts": ["karma-typescript", "babel"],
"test/**/*.ts": ["karma-typescript", "babel"]
},
babelPreprocessor: {
options: babel
},
karmaTypescriptConfig: {
// Inline `tsconfig.json` so that the right TS libs are loaded
...typeScriptConfig,
// Coverage is a thing that karma-typescript forces on you and only
// creates problems. This is the simplest way of disabling it that I
// could find.
coverageOptions: {
exclude: /.*/
}
},
mime: {
// Default mimetype for .ts files is video/mp2t but we need
// text/javascript for modules to work.
"text/javascript": ["ts"]
},
plugins: [
// Load all modules whose name starts with "karma" (usually the default).
"karma-*",
// We dont have file extensions on our imports as they are primarily
// consumed by webpack. With Karma, however, this turns into a real HTTP
// request for a non-existent file. This inline plugin is a middleware
// that appends `.ts` to the request URL.
{
"middleware:redirect_to_ts": [
"value",
(req, res, next) => {
if (req.url.startsWith("/base/src")) {
req.url += '.ts';
}
next();
}
]
}
],
// Run our middleware before all other middlewares.
beforeMiddleware: ["redirect_to_ts"],
// test results reporter to use
// possible values: 'dots', 'progress'
// available reporters: https://npmjs.org/browse/keyword/karma-reporter
reporters: ["progress"],
// web server port
port: 9876,
// enable / disable colors in the output (reporters and logs)
colors: true,
// level of logging
// possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
logLevel: config.LOG_INFO,
// enable / disable watching file and executing tests whenever any file changes
autoWatch: false,
// start these browsers
// available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
browsers: ["ChromeHeadless"],
// Continuous Integration mode
// if true, Karma captures browsers, runs the tests and exits
singleRun: true,
// These custom files allow us to use ES6 modules in our tests.
// Remove these 2 lines (and files) once https://github.com/karma-runner/karma/pull/2834 lands.
customContextFile: "test/context.html",
customDebugFile: "test/debug.html"
};
config.set(options);
};