Fix test to not depend on analyzer error message.

pubspec.lock

Index: pubspec.lock
diff --git a/pubspec.lock b/pubspec.lock
index 4f48aa0697daf270748169b3ddf7877ed130d06b..2ff570c76285ff16ecb7bbddc7dc19c63ae09dcb 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -49,12 +49,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.0"
-  cli_util:
-    description:
-      name: cli_util
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.0.1+2"
   collection:
     description:
       name: collection
@@ -78,7 +72,7 @@ packages:
       name: csslib
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.13.2"
+    version: "0.13.2+1"
   glob:
     description:
       name: glob
@@ -90,7 +84,7 @@ packages:
       name: grinder
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.8.0+2"
+    version: "0.8.0+3"
   html:
     description:
       name: html
@@ -114,7 +108,7 @@ packages:
       name: http_parser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.2"
+    version: "3.0.3"
   isolate:
     description:
       name: isolate
@@ -180,7 +174,7 @@ packages:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.9"
+    version: "1.4.0"
   plugin:
     description:
       name: plugin
@@ -252,7 +246,7 @@ packages:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.7"
+    version: "1.6.8"
   stream_channel:
     description:
       name: stream_channel
@@ -276,7 +270,7 @@ packages:
       name: test
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.15+9"
+    version: "0.12.15+10"
   typed_data:
     description:
       name: typed_data
@@ -307,23 +301,11 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.4"
-  when:
-    description:
-      name: when
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.2.0"
-  which:
-    description:
-      name: which
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.1.3"
   yaml:
     description:
       name: yaml
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.11"
+    version: "2.1.12"
 sdks:
   dart: ">=1.19.0-dev.0.0 <2.0.0"