test_runner: support typescript files in default glob

Author: avivkeller

lib/internal/test_runner/utils.js

@@ -54,7 +54,8 @@ const kMultipleCallbackInvocations = 'multipleCallbackInvocations';
 const kRegExpPattern = /^\/(.*)\/([a-z]*)$/;
 
 const kPatterns = ['test', 'test/**/*', 'test-*', '*[._-]test'];
-const kDefaultPattern = `**/{${ArrayPrototypeJoin(kPatterns, ',')}}.?(c|m)js`;
+const kFileExtension = getOptionValue('--experimental-strip-types') ? '(c|m)(t|j)s' : '(c|m)js';
+const kDefaultPattern = `**/{${ArrayPrototypeJoin(kPatterns, ',')}}.?${kFileExtension}`;
 
 
 function createDeferredCallback() {