Fix crypto tests

tests/lib/crypto/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 Dartium to run the tests.
 library sha256_test;
 
 import "package:expect/expect.dart";
 import "package:crypto/crypto.dart";
 
@@ skipping 271 matching lines @@
     var hash = new SHA256();
     hash.add(createTestArr(i));
     var d = hash.close();
     Expect.equals(expected_values[i], CryptoUtils.bytesToHex(d), '$i');
   }
 }
 
 void testInvalidUse() {
   var sha = new SHA256();
   sha.close();
-  Expect.throws(() => sha.add([0]), (e) => e is HashException);
+  Expect.throws(() => sha.add([0]), (e) => e is StateError);
 }
 
 void testRepeatedDigest() {
   var sha = new SHA256();
   var digest = sha.close();
   Expect.listEquals(digest, sha.close());
 }
 
 void testStandardVectors(inputs, mds) {
   for (var i = 0; i < inputs.length; i++) {
     var hash = new SHA256();
     hash.add(inputs[i]);
     var d = hash.close();
     Expect.equals(mds[i], CryptoUtils.bytesToHex(d), '$i');
   }
 }
 
 void main() {
   test();
   testInvalidUse();
   testRepeatedDigest();
   testStandardVectors(sha256_long_inputs, sha256_long_mds);
   testStandardVectors(sha256_short_inputs, sha256_short_mds);
 }