Run pub tests against older versions of barback.

third_party/pkg/barback-0.13.0/test/utils.dart

Index: third_party/pkg/barback-0.13.0/test/utils.dart
diff --git a/pkg/barback/test/utils.dart b/third_party/pkg/barback-0.13.0/test/utils.dart
similarity index 91%
copy from pkg/barback/test/utils.dart
copy to third_party/pkg/barback-0.13.0/test/utils.dart
index 4fa3d3f2357919f5c03a8dfd67825049be6ee4dc..7a77f1bddd27dcbf89415413a13f7e5e5c2c8c8e 100644
--- a/pkg/barback/test/utils.dart
+++ b/third_party/pkg/barback-0.13.0/test/utils.dart
@@ -5,11 +5,12 @@
 library barback.test.utils;
 
 import 'dart:async';
+import 'dart:collection';
 import 'dart:convert' show Encoding;
 
 import 'package:barback/barback.dart';
+import 'package:barback/src/cancelable_future.dart';
 import 'package:barback/src/utils.dart';
-import 'package:barback/src/utils/cancelable_future.dart';
 import 'package:path/path.dart' as pathos;
 import 'package:scheduled_test/scheduled_test.dart';
 import 'package:stack_trace/stack_trace.dart';
@@ -22,22 +23,15 @@ export 'transformer/check_content.dart';
 export 'transformer/check_content_and_rename.dart';
 export 'transformer/conditionally_consume_primary.dart';
 export 'transformer/create_asset.dart';
-export 'transformer/declare_assets.dart';
-export 'transformer/declaring_bad.dart';
-export 'transformer/declaring_check_content_and_rename.dart';
-export 'transformer/declaring_rewrite.dart';
 export 'transformer/emit_nothing.dart';
 export 'transformer/has_input.dart';
-export 'transformer/lazy_assets.dart';
 export 'transformer/lazy_bad.dart';
-export 'transformer/lazy_check_content_and_rename.dart';
 export 'transformer/lazy_many_to_one.dart';
 export 'transformer/lazy_rewrite.dart';
 export 'transformer/many_to_one.dart';
 export 'transformer/mock.dart';
 export 'transformer/one_to_many.dart';
 export 'transformer/rewrite.dart';
-export 'transformer/sync_rewrite.dart';
 
 var _configured = false;
 
@@ -81,7 +75,30 @@ void initGraph([assets,
   if (assets == null) assets = [];
   if (transformers == null) transformers = {};
 
-  _provider = new MockProvider(assets, additionalPackages: transformers.keys);
+  var assetList;
+  if (assets is Map) {
+    assetList = assets.keys.map((asset) {
+      var id = new AssetId.parse(asset);
+      return new _MockAsset(id, assets[asset]);
+    });
+  } else if (assets is Iterable) {
+    assetList = assets.map((asset) {
+      var id = new AssetId.parse(asset);
+      var contents = pathos.basenameWithoutExtension(id.path);
+      return new _MockAsset(id, contents);
+    });
+  }
+
+  var assetMap = mapMapValues(groupBy(assetList, (asset) => asset.id.package),
+      (package, assets) => new AssetSet.from(assets));
+
+  // Make sure that packages that have transformers but no assets are considered
+  // by MockProvider to exist.
+  for (var package in transformers.keys) {
+    assetMap.putIfAbsent(package, () => new AssetSet());
+  }
+
+  _provider = new MockProvider(assetMap);
   _barback = new Barback(_provider);
   // Add a dummy listener to the log so it doesn't print to stdout.
   _barback.log.listen((_) {});
@@ -464,7 +481,7 @@ Future _futureShouldNotCompleteUntil(Future future, Future delay,
 class MockProvider implements PackageProvider {
   Iterable<String> get packages => _assets.keys;
 
-  final Map<String, AssetSet> _assets;
+  Map<String, AssetSet> _assets;
 
   /// The set of assets for which [MockLoadException]s should be emitted if
   /// they're loaded.
@@ -488,40 +505,13 @@ class MockProvider implements PackageProvider {
     _pauseCompleter = null;
   }
 
-  MockProvider(assets, {Iterable<String> additionalPackages})
-      : _assets = _normalizeAssets(assets, additionalPackages);
-
-  static Map<String, AssetSet> _normalizeAssets(assets,
-      Iterable<String> additionalPackages) {
-    var assetList;
-    if (assets is Map) {
-      assetList = assets.keys.map((asset) {
-        var id = new AssetId.parse(asset);
-        return new _MockAsset(id, assets[asset]);
-      });
-    } else if (assets is Iterable) {
-      assetList = assets.map((asset) {
-        var id = new AssetId.parse(asset);
-        var contents = pathos.basenameWithoutExtension(id.path);
-        return new _MockAsset(id, contents);
-      });
-    }
-
-    var assetMap = mapMapValues(groupBy(assetList, (asset) => asset.id.package),
-        (package, assets) => new AssetSet.from(assets));
-
-    // Make sure that packages that have transformers but no assets are
-    // considered by MockProvider to exist.
-    if (additionalPackages != null) {
-      for (var package in additionalPackages) {
-        assetMap.putIfAbsent(package, () => new AssetSet());
-      }
-    }
-
+  MockProvider(this._assets) {
     // If there are no assets or transformers, add a dummy package. This better
     // simulates the real world, where there'll always be at least the
     // entrypoint package.
-    return assetMap.isEmpty ? {"app": new AssetSet()} : assetMap;
+    if (_assets.isEmpty) {
+      _assets = {"app": new AssetSet()};
+    }
   }
 
   void _modifyAsset(String name, String contents) {