first incomplete cut at invocation/accessor suggestions

pkg/analysis_services/test/completion/completion_test_util.dart

Index: pkg/analysis_services/test/completion/completion_test_util.dart
diff --git a/pkg/analysis_services/test/completion/completion_test_util.dart b/pkg/analysis_services/test/completion/completion_test_util.dart
index 91439e8f3a17a2ca54bf29ba62fe47f8860f8516..58b49f7b5f2b70fc92e366a9507a3eeb4a51a128 100644
--- a/pkg/analysis_services/test/completion/completion_test_util.dart
+++ b/pkg/analysis_services/test/completion/completion_test_util.dart
@@ -61,7 +61,9 @@ class AbstractCompletionTest extends AbstractContextTest {
         if (cs == null) {
           cs = s;
         } else {
-          fail('expected exactly one $completion but found > 1');
+          var match =
+              suggestions.where((s) => s.completion == completion).toList();
+          fail('expected exactly one $completion but found > 1\n $match');
         }
       }
     });
@@ -92,6 +94,11 @@ class AbstractCompletionTest extends AbstractContextTest {
     assertSuggest(CompletionSuggestionKind.FUNCTION, completion, relevance);
   }
 
+  void assertSuggestGetter(String className, [CompletionRelevance relevance =
+      CompletionRelevance.DEFAULT]) {
+    assertSuggest(CompletionSuggestionKind.GETTER, className, relevance);
+  }
+
   void assertSuggestLibraryPrefix(String completion,
       [CompletionRelevance relevance = CompletionRelevance.DEFAULT]) {
     assertSuggest(
@@ -100,6 +107,11 @@ class AbstractCompletionTest extends AbstractContextTest {
         relevance);
   }
 
+  void assertSuggestMethod(String className, [CompletionRelevance relevance =
+      CompletionRelevance.DEFAULT]) {
+    assertSuggest(CompletionSuggestionKind.METHOD, className, relevance);
+  }
+
   void assertSuggestMethodName(String completion, [CompletionRelevance relevance
       = CompletionRelevance.DEFAULT]) {
     assertSuggest(CompletionSuggestionKind.METHOD_NAME, completion, relevance);
@@ -110,6 +122,11 @@ class AbstractCompletionTest extends AbstractContextTest {
     assertSuggest(CompletionSuggestionKind.PARAMETER, completion, relevance);
   }
 
+  void assertSuggestSetter(String className, [CompletionRelevance relevance =
+      CompletionRelevance.DEFAULT]) {
+    assertSuggest(CompletionSuggestionKind.SETTER, className, relevance);
+  }
+
   void assertSuggestTopLevelVar(String completion,
       [CompletionRelevance relevance = CompletionRelevance.DEFAULT]) {
     assertSuggest(
@@ -120,7 +137,10 @@ class AbstractCompletionTest extends AbstractContextTest {
 
   void assertSuggestVariable(String completion, [CompletionRelevance relevance =
       CompletionRelevance.DEFAULT]) {
-    assertSuggest(CompletionSuggestionKind.LOCAL_VARIABLE, completion, relevance);
+    assertSuggest(
+        CompletionSuggestionKind.LOCAL_VARIABLE,
+        completion,
+        relevance);
   }
 
   bool computeFast() {