Don't use the full filename for hash value when sharding tests, this will make the result depend on…

tools/testing/dart/test_suite.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.
 
 /**
  * Classes and methods for enumerating and preparing tests.
  *
  * This library includes:
  *
  * - Creating tests by listing all the Dart files in certain directories,
@@ skipping 309 matching lines @@
       } else {
         testName = filename;
       }
 
       if (configuration['compiler'] != 'dartc') {
         if (testName.endsWith('.dart')) {
           testName = testName.substring(0, testName.length - 5);
         }
       }
     }
+    int shards = configuration['shards'];
+    if (shards > 1) {
+      int shard = configuration['shard'];
+      if (testName.hashCode() % shards != shard -1) {
+        return;
+      }
+    }
+    
     Set<String> expectations = testExpectations.expectations(testName);
     if (configuration['report']) {
       // Tests with multiple VMOptions are counted more than once.
       for (var dummy in optionsFromFile["vmOptions"]) {
         SummaryReport.add(expectations);
       }
     }
     if (expectations.contains(SKIP)) return;
 
     if (TestUtils.isBrowserRuntime(configuration['runtime'])) {
@@ skipping 33 matching lines @@
     }
   }
 
   Function makeTestCaseCreator(Map optionsFromFile) {
     return (String filename,
             bool isNegative,
             [bool isNegativeIfChecked = false,
              bool hasFatalTypeErrors = false,
              bool hasRuntimeErrors = false,
              Set<String> multitestOutcome = null]) {
-      int shards = configuration['shards'];
-      if (shards > 1) {
-        int shard = configuration['shard'];
-        if (filename.hashCode() % shards != shard -1) {
-          return;
-        }
-      }
-
       // Cache the test information for each test case.
       var info = new TestInformation(filename,
                                      optionsFromFile,
                                      isNegative,
                                      isNegativeIfChecked,
                                      hasFatalTypeErrors,
                                      hasRuntimeErrors,
                                      multitestOutcome);
       cachedTests.add(info);
       enqueueTestCaseFromTestInformation(info);
@@ skipping 838 matching lines @@
  * $noCrash tests are expected to be flaky but not crash
  * $pass tests are expected to pass
  * $failOk tests are expected to fail that we won't fix
  * $fail tests are expected to fail that we should fix
  * $crash tests are expected to crash that we should fix
  * $timeout tests are allowed to timeout
 """;
     print(report);
    }
 }