Support publishing packages with many long filenames.

sdk/lib/_internal/pub/test/test_pub.dart

 // Copyright (c) 2013, 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 446 matching lines @@
 }
 
 /// Handles the beginning confirmation process for uploading a packages.
 ///
 /// Ensures that the right output is shown and then enters "y" to confirm the
 /// upload.
 void confirmPublish(ScheduledProcess pub) {
   // TODO(rnystrom): This is overly specific and inflexible regarding different
   // test packages. Should validate this a little more loosely.
   pub.stdout.expect(startsWith('Publishing test_pkg 1.0.0 to '));
-  pub.stdout.expect(emitsLines(
-      "|-- LICENSE\n"
-      "|-- lib\n"
-      "|   '-- test_pkg.dart\n"
-      "'-- pubspec.yaml\n"
-      "\n"
+  pub.stdout.expect(consumeThrough(
       "Looks great! Are you ready to upload your package (y/n)?"));
   pub.writeLine("y");
 }
 
 /// Gets the absolute path to [relPath], which is a relative path in the test
 /// sandbox.
 String _pathInSandbox(String relPath) {
   return p.join(p.absolute(sandboxDir), relPath);
 }
 
@@ skipping 489 matching lines @@
         _lastMatcher.matches(item.last, matchState);
   }
 
   Description describe(Description description) {
     return description.addAll("(", ", ", ")", [_firstMatcher, _lastMatcher]);
   }
 }
 
 /// A [StreamMatcher] that matches multiple lines of output.
 StreamMatcher emitsLines(String output) => inOrder(output.split("\n"));