Add a flag controlling how verbose stack traces are.

test/runner/expanded_reporter_test.dart

 // Copyright (c) 2015, 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.
 
 @TestOn("vm")
 
 import 'dart:io';
 
 import 'package:path/path.dart' as p;
 import 'package:test/src/util/io.dart';
@@ skipping 40 matching lines @@
           test.dart 7:33  main.<fn>
 
         +0 -2: failure 3
         +0 -3: failure 3
           oh no
           test.dart 8:33  main.<fn>
 
         +0 -3: Some tests failed.""");
   });
 
+  test("includes the full stack trace with --verbose-trace", () {
+    return withTempDir((path) {
+      new File(p.join(path, "test.dart")).writeAsStringSync("""
+import 'dart:async';
+
+import 'package:test/test.dart';
+
+void main() {
+  test("failure", () => throw "oh no");
+}
+""");
+      var result = runTest(["-r", "compact", "--verbose-trace", "test.dart"],
+          workingDirectory: path);
+      expect(result.stdout, contains("dart:isolate-patch"));
+    });
+  });
+
   test("runs failing tests along with successful tests", () {
     _expectReport("""
         test('failure 1', () => throw new TestFailure('oh no'));
         test('success 1', () {});
         test('failure 2', () => throw new TestFailure('oh no'));
         test('success 2', () {});""",
         """
         +0: failure 1
         +0 -1: failure 1
           oh no
@@ skipping 242 matching lines @@
     // Un-indent the expected string.
     var indentation = expected.indexOf(new RegExp("[^ ]"));
     expected = expected.split("\n").map((line) {
       if (line.isEmpty) return line;
       return line.substring(indentation);
     }).join("\n");
 
     expect(actual, equals(expected));
   }), completes);
 }