debugging on CI

Author: mmalerba

test/karma-test-shim.js

@@ -25,7 +25,8 @@ configureTestBed()
 /** Runs the Angular Material specs in Karma. */
 function runMaterialSpecs() {
   // By importing all spec files, Karma will run the tests directly.
-  return Promise.all(specFiles.map(function(fileName) {
+  const subset = specFiles.slice(0, specFiles.length / 2);
+  return Promise.all(subset.map(function(fileName) {
     return System.import(fileName);
   }));
 }