Add support for transformer clusters to barback.

pkg/barback/test/package_graph/add_remove_transform_test.dart

Index: pkg/barback/test/package_graph/add_remove_transform_test.dart
diff --git a/pkg/barback/test/package_graph/add_remove_transform_test.dart b/pkg/barback/test/package_graph/add_remove_transform_test.dart
index ac0076cd8f1f6df3d82c75db435a69a8fc121cf8..a58fa74293db604709b6cb8496d015af1d9fb7a9 100644
--- a/pkg/barback/test/package_graph/add_remove_transform_test.dart
+++ b/pkg/barback/test/package_graph/add_remove_transform_test.dart
@@ -18,7 +18,7 @@ main() {
     expectAsset("app|foo.blub", "foo");
     buildShouldSucceed();
 
-    updateTransformers("app", [[new RewriteTransformer("blub", "blab")]]);
+    updateOperators("app", [[new RewriteTransformer("blub", "blab")]]);
     expectAsset("app|foo.blab", "foo.blab");
     expectNoAsset("app|foo.blub");
     buildShouldSucceed();
@@ -31,13 +31,13 @@ main() {
     expectAsset("app|foo.blub", "foo");
     buildShouldSucceed();
 
-    updateTransformers("app", [[new RewriteTransformer("zip", "zap")]]);
+    updateOperators("app", [[new RewriteTransformer("zip", "zap")]]);
     expectAsset("app|foo.blub", "foo");
     expectNoAsset("app|foo.zap");
     buildShouldSucceed();
   });
 
-  test("updateTransformers doesn't re-run an old transformer", () {
+  test("updateOperators doesn't re-run an old transformer", () {
     var rewrite = new RewriteTransformer("blub", "blab");
     initGraph(["app|foo.blub"], {"app": [[rewrite]]});
 
@@ -46,7 +46,7 @@ main() {
     expectNoAsset("app|foo.blub");
     buildShouldSucceed();
 
-    updateTransformers("app", [[rewrite]]);
+    updateOperators("app", [[rewrite]]);
     expectAsset("app|foo.blab", "foo.blab");
     expectNoAsset("app|foo.blub");
     buildShouldSucceed();
@@ -54,7 +54,7 @@ main() {
     expect(rewrite.numRuns, completion(equals(1)));
   });
 
-  test("updateTransformers re-runs old transformers in a new phase", () {
+  test("updateOperators re-runs old transformers in a new phase", () {
     var rewrite1 = new RewriteTransformer("txt", "blub");
     var rewrite2 = new RewriteTransformer("blub", "blab");
     initGraph(["app|foo.txt"], {"app": [[rewrite1], [rewrite2]]});
@@ -64,13 +64,13 @@ main() {
     expectNoAsset("app|foo.blub");
     buildShouldSucceed();
 
-    updateTransformers("app", [[rewrite2], [rewrite1]]);
+    updateOperators("app", [[rewrite2], [rewrite1]]);
     expectAsset("app|foo.blub", "foo.blub");
     expectNoAsset("app|foo.blab");
     buildShouldSucceed();
   });
 
-  test("updateTransformers re-runs an old transformer when a previous phase "
+  test("updateOperators re-runs an old transformer when a previous phase "
       "changes", () {
     var rewrite = new RewriteTransformer("txt", "out");
     initGraph(["app|foo.txt"], {"app": [[], [rewrite]]});
@@ -79,7 +79,7 @@ main() {
     expectAsset("app|foo.out", "foo.out");
     buildShouldSucceed();
 
-    updateTransformers("app", [
+    updateOperators("app", [
       [new RewriteTransformer("txt", "txt")],
       [rewrite]
     ]);
@@ -97,7 +97,7 @@ main() {
     expectNoAsset("app|foo.blub");
     buildShouldSucceed();
 
-    updateTransformers("app", []);
+    updateOperators("app", []);
     expectAsset("app|foo.blub", "foo");
     expectNoAsset("app|foo.blab");
     buildShouldSucceed();
@@ -115,7 +115,7 @@ main() {
     expectNoAsset("app|foo.phase3");
     buildShouldSucceed();
 
-    updateTransformers("app", [
+    updateOperators("app", [
       [rewrite1],
       [new RewriteTransformer("phase1", "phase2")],
       [rewrite3]
@@ -137,7 +137,7 @@ main() {
     expectAsset("app|foo.phase3", "foo.phase1.phase2.phase3");
     buildShouldSucceed();
 
-    updateTransformers("app", [[rewrite1], [rewrite3]]);
+    updateOperators("app", [[rewrite1], [rewrite3]]);
     expectNoAsset("app|foo.phase3");
     buildShouldSucceed();
   });
@@ -151,7 +151,7 @@ main() {
     // Ensure we're waiting on [rewrite.isPrimary].
     schedule(pumpEventQueue);
 
-    updateTransformers("app", []);
+    updateOperators("app", []);
     rewrite.resumeIsPrimary("app|foo.blub");
     expectAsset("app|foo.blub", "foo");
     expectNoAsset("app|foo.blab");
@@ -167,7 +167,7 @@ main() {
     // Ensure we're waiting on [rewrite.apply].
     schedule(pumpEventQueue);
 
-    updateTransformers("app", []);
+    updateOperators("app", []);
     rewrite.resumeApply();
     expectAsset("app|foo.blub", "foo");
     expectNoAsset("app|foo.blab");
@@ -183,7 +183,7 @@ main() {
     // Ensure we're waiting on [rewrite.isPrimary].
     schedule(pumpEventQueue);
 
-    updateTransformers("app", [
+    updateOperators("app", [
       [rewrite, new RewriteTransformer("blib", "blob")]
     ]);
     rewrite.resumeIsPrimary("app|foo.blub");
@@ -199,7 +199,7 @@ main() {
     updateSources(["app|foo.blub"]);
     buildShouldSucceed();
 
-    updateTransformers("app", [
+    updateOperators("app", [
       [rewrite],
       [new RewriteTransformer("blub", "blab")]
     ]);
@@ -222,7 +222,7 @@ main() {
     expectAsset("pkg1|foo.out", "foo.inc");
     buildShouldSucceed();
 
-    updateTransformers("pkg2", [
+    updateOperators("pkg2", [
       [rewrite],
       [new RewriteTransformer("inc", "inc")]
     ]);
@@ -248,7 +248,7 @@ main() {
     expectAsset("pkg1|foo.out", "foo.inc.inc");
     buildShouldSucceed();
 
-    updateTransformers("pkg2", [[rewrite]]);
+    updateOperators("pkg2", [[rewrite]]);
     expectAsset("pkg1|foo.out", "foo.inc");
     buildShouldSucceed();
   });
@@ -264,7 +264,7 @@ main() {
     expectAsset("app|foo.mid", "foo.mid");
     buildShouldSucceed();
 
-    updateTransformers("app", [
+    updateOperators("app", [
       [rewrite],
       [new RewriteTransformer("mid", "out")]
     ]);