unit tests!

scripts/test/test-main.js

@@ -0,0 +1,52 @@
+// Use "register" extension from systemjs.
+// That's what Traceur outputs: `System.register()`.
+register(System);
+
+jasmine.DEFAULT_TIMEOUT_INTERVAL = 50;
+
+// Cancel Karma's synchronous start,
+// we will call `__karma__.start()` later, once all the specs are loaded.
+__karma__.loaded = function() {};
+
+System.baseURL = 'http://localhost:9876/base/dist/';
+
+// So that we can import packages like `core/foo`, instead of `core/src/foo`.
+// System.paths = {
+//   '*': './*.js',
+//   'transpiler/*': '../tools/transpiler/*.js'
+// }
+
+Promise.all(
+  Object.keys(window.__karma__.files) // All files served by Karma.
+  .filter(onlySpecFiles)
+  .map(window.file2moduleName)        // Normalize paths to module names.
+  .map(function(path) {
+    return System.import(path).then(function(module) {
+      if (module.hasOwnProperty('main')) {
+        module.main();
+      } else {
+        throw new Error('Module ' + path + ' does not implement main() method.');
+      }
+    });
+  }))
+.then(function() {
+  __karma__.start();
+}, function(error) {
+  console.error(error.stack || error);
+  __karma__.start();
+});
+
+function onlySpecFiles(path) {
+  return /_spec\.js$/.test(path);
+}
+function file2moduleName(filePath) {
+  return filePath.replace(/\\/g, '/')
+    .replace(/^.*?\/dist\//, '')
+    // module name should be relative to `modules` and `tools` folder
+    // .replace(/.*\/modules\//, '')
+    // .replace(/.*\/tools\//, '')
+    // module name should not include `lib`, `web` folders
+    // module name should not have a suffix
+    // .split('.').pop().join('');
+    .replace(/\.\w*$/, '');
+}