Allow Suites to be added to an Engine over time.

test/runner/pub_serve_test.dart

Index: test/runner/pub_serve_test.dart
diff --git a/test/runner/pub_serve_test.dart b/test/runner/pub_serve_test.dart
index 973fcda570c570838b30357918ba5064d6e2a4ef..5f38b3a9eca8644179b4856467187357ac9339fa 100644
--- a/test/runner/pub_serve_test.dart
+++ b/test/runner/pub_serve_test.dart
@@ -135,7 +135,7 @@ void main() {
         var result = runTest(['--pub-serve=${pair.last}'],
             workingDirectory: _sandbox);
         expect(result.stdout, allOf([
-          contains('-1: load error'),
+          contains('-1: ${p.join("test", "my_test.dart")}: load error'),
           contains('Failed to load "${p.join("test", "my_test.dart")}":'),
           contains('404 Not Found'),
           contains('Make sure "pub serve" is serving the test/ directory.')
@@ -155,7 +155,7 @@ void main() {
         var result = runTest(['--pub-serve=${pair.last}', '-p', 'chrome'],
             workingDirectory: _sandbox);
         expect(result.stdout, allOf([
-          contains('-1: load error'),
+          contains('-1: ${p.join("test", "my_test.dart")}: load error'),
           contains('Failed to load "${p.join("test", "my_test.dart")}":'),
           contains('404 Not Found'),
           contains('Make sure "pub serve" is serving the test/ directory.')
@@ -300,7 +300,7 @@ void main() {
     var result = runTest(['--pub-serve=54321'],
         workingDirectory: _sandbox);
     expect(result.stdout, allOf([
-      contains('-1: load error'),
+      contains('-1: ${p.join("test", "my_test.dart")}: load error'),
       contains('''
   Failed to load "${p.join("test", "my_test.dart")}":
   Error getting http://localhost:54321/my_test.dart.vm_test.dart: Connection refused
@@ -317,7 +317,7 @@ void main() {
         : 'Connection refused (errno ';
 
     expect(result.stdout, allOf([
-      contains('-1: load error'),
+      contains('-1: ${p.join("test", "my_test.dart")}: load error'),
       contains('Failed to load "${p.join("test", "my_test.dart")}":'),
       contains('Error getting http://localhost:54321/my_test.dart.browser_test'
           '.dart.js.map: $message'),