Library syntax updates. Covers all remaining files in ~/tests aprt from ~/tests/language and ~/test…

tests/lib/crypto/hmac_sha256_test.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // Library tag to allow the test to run on Dartium.
-#library('hmac_sha256_test');
+library hmac_sha256_test;
 
-#import("dart:crypto");
+import 'dart:crypto';
 
-#source('hmac_sha256_test_vectors.dart');
+part 'hmac_sha256_test_vectors.dart';
 
 void testStandardVectors(inputs, keys, macs) {
   for (var i = 0; i < inputs.length; i++) {
     var d = new HMAC(new SHA256(), keys[i]).update(inputs[i]).digest();
     Expect.isTrue(CryptoUtils.bytesToHex(d).startsWith(macs[i]), '$i');
   }
 }
 
 void main() {
   testStandardVectors(hmac_sha256_inputs, hmac_sha256_keys, hmac_sha256_macs);
 }