Handle shared path dependencies.

utils/tests/pub/test_pub.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.
 
 /// Test infrastructure for testing pub. Unlike typical unit tests, most pub
 /// tests are integration tests that stage some stuff on the file system, run
 /// pub, and then validate the results. This library provides an API to build
 /// tests like that.
 library test_pub;
 
@@ skipping 541 matching lines @@
 }
 
 /// Schedules renaming (moving) the directory at [from] to [to], both of which
 /// are assumed to be relative to [sandboxDir].
 void scheduleRename(String from, String to) {
   _schedule((sandboxDir) {
     return renameDir(path.join(sandboxDir, from), path.join(sandboxDir, to));
   });
 }
 
+
+/// Schedules creating a symlink at path [symlink] that points to [target],
+/// both of which are assumed to be relative to [sandboxDir].
+void scheduleSymlink(String target, String symlink) {
+  _schedule((sandboxDir) {
+    return createSymlink(path.join(sandboxDir, target),
+        path.join(sandboxDir, symlink));
+  });
+}
+
 /// Schedules a call to the Pub command-line utility. Runs Pub with [args] and
 /// validates that its results match [output], [error], and [exitCode].
 void schedulePub({List args, Pattern output, Pattern error,
     Future<Uri> tokenEndpoint, int exitCode: 0}) {
   _schedule((sandboxDir) {
     return _doPub(runProcess, sandboxDir, args, tokenEndpoint).then((result) {
       var failures = [];
 
       _validateOutput(failures, 'stdout', output, result.stdout);
       _validateOutput(failures, 'stderr', error, result.stderr);
@@ skipping 1052 matching lines @@
 /// calling [completion] is unnecessary.
 void expectLater(Future actual, matcher, {String reason,
     FailureHandler failureHandler, bool verbose: false}) {
   _schedule((_) {
     return actual.then((value) {
       expect(value, matcher, reason: reason, failureHandler: failureHandler,
           verbose: false);
     });
   });
 }