Added a test for issue 12474.

tests/isolate/isolate.status

 # 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.
 
 [ $runtime == vm ]
 browser/*: SkipByDesign  # Browser specific tests
 isolate_stress_test: Fail # Issue 12588: This should be able to pass when we have wrapper-less tests.
 
 [ $runtime == vm && $arch == mips && $mode == debug ]
 mandel_isolate_test: Skip # Uses 600 MB Ram on our 1 GB test device.
@@ skipping 35 matching lines @@
 cross_isolate_message_test: Skip # Issue 12627
 message_test: Skip # Issue 12627
 
 [ $compiler == dart2js ]
 spawn_uri_vm_test: SkipByDesign # Test uses a ".dart" URI.
 spawn_uri_nested_vm_test: SkipByDesign # Test uses a ".dart" URI.
 spawn_uri_exported_main_test: SkipByDesign # Test uses a ".dart" URI.
 issue_21398_parent_isolate_test: SkipByDesign # Test uses a ".dart" URI.
 issue_21398_parent_isolate1_test: SkipByDesign # Test uses a ".dart" URI.
 issue_21398_parent_isolate2_test: SkipByDesign # Test uses a ".dart" URI.
+issue_12474_test: SkipByDesign # Test uses a ".dart" URI.
 message3_test/constList: RuntimeError # Issue 21817
 message3_test/constList_identical: RuntimeError # Issue 21817
 message3_test/constMap: RuntimeError  # Issue 21817
 message3_test/constInstance: RuntimeError # Issue 21817
 
 [ $compiler == dart2js && $jscl ]
 spawn_uri_test: SkipByDesign # Loading another file is not supported in JS shell
 
 [ $compiler == dart2js && $runtime == chromeOnAndroid ]
 isolate_stress_test: Pass, Slow # TODO(kasperl): Please triage.
 
 mandel_isolate_test: Pass, Timeout # TODO(kasperl): Please triage.
 
 [ $compiler == dart2dart ]
 illegal_msg_mirror_test: RuntimeError    # Issue 16548
 spawn_uri_multi_test/none: RuntimeError  # Issue 16549
 spawn_uri_nested_vm_test: RuntimeError   # Issue 16549
 spawn_uri_test: RuntimeError             # Issue 16549
 spawn_uri_vm_test: RuntimeError          # Issue 16549
 spawn_uri_exported_main_test: RuntimeError # Issue 16549
 issue_21398_parent_isolate_test: RuntimeError  # Issue 16549
 issue_21398_parent_isolate1_test: RuntimeError # Issue 16549
 issue_21398_parent_isolate2_test: Skip # Not implemented yet
+issue_12474_test: Skip # Not implemented yet
 
 [ $compiler == dart2js && ( $runtime == ff || $runtime == safari || $runtime == drt || $runtime == chrome || $runtime == chromeOnAndroid) ]
 isolate_stress_test: Pass, Slow # Issue 10697
 
 [ $compiler == dart2js && $runtime == chromeOnAndroid ]
 unresolved_ports_test: Pass, Timeout # Issue 15610
 
 [ $compiler == none && $runtime == drt ]
 spawn_uri_nested_vm_test: Skip # Issue 14463
 
@@ skipping 22 matching lines @@
 spawn_uri_missing_from_isolate_test: RuntimeError # Issue 17649
 spawn_uri_missing_test: SkipSlow # Times out.
 isolate_current_test: Fail, OK # Issue 13921 Dom isolates don't support spawnFunction
 
 [ $compiler == dartanalyzer || $compiler == dart2analyzer ]
 browser/typed_data_message_test: StaticWarning
 mint_maker_test: StaticWarning
 
 [ $compiler != none || $runtime != vm ]
 package_root_test: SkipByDesign # Uses dart:io.