fix completion in for statement

pkg/analysis_server/test/services/completion/completion_test_util.dart

Index: pkg/analysis_server/test/services/completion/completion_test_util.dart
diff --git a/pkg/analysis_server/test/services/completion/completion_test_util.dart b/pkg/analysis_server/test/services/completion/completion_test_util.dart
index 6a19a2ea9b1064b0b3495fb28327c5316d22f84e..2764b5877e8ce56240016cc530e584775acdba85 100644
--- a/pkg/analysis_server/test/services/completion/completion_test_util.dart
+++ b/pkg/analysis_server/test/services/completion/completion_test_util.dart
@@ -1853,6 +1853,7 @@ abstract class AbstractSelectorSuggestionTest extends AbstractCompletionTest {
     return computeFull((bool result) {
       expect(request.replacementOffset, completionOffset);
       expect(request.replacementLength, 0);
+      assertSuggestParameter('args', null);
       assertSuggestLocalVariable('foo', 'int');
       assertSuggestImportedClass('Object');
     });
@@ -1865,11 +1866,62 @@ abstract class AbstractSelectorSuggestionTest extends AbstractCompletionTest {
     return computeFull((bool result) {
       expect(request.replacementOffset, completionOffset);
       expect(request.replacementLength, 0);
+      assertSuggestParameter('args', null);
       assertSuggestLocalVariable('foo', null);
       assertSuggestImportedClass('Object');
     });
   }
 
+  test_ForEachStatement_iterable() {
+    // SimpleIdentifier  ForEachStatement  Block
+    addTestSource('main(args) {for (int foo in ^) {}}');
+    computeFast();
+    return computeFull((bool result) {
+      expect(request.replacementOffset, completionOffset);
+      expect(request.replacementLength, 0);
+      assertSuggestParameter('args', null);
+      assertSuggestImportedClass('Object');
+    });
+  }
+
+  test_ForEachStatement_loopVariable() {
+    // SimpleIdentifier  ForEachStatement  Block
+    addTestSource('main(args) {for (^ in args) {}}');
+    computeFast();
+    return computeFull((bool result) {
+      expect(request.replacementOffset, completionOffset);
+      expect(request.replacementLength, 0);
+      assertNotSuggested('args');
+      assertSuggestImportedClass('String');
+    });
+  }
+
+  test_ForEachStatement_loopVariable_type() {
+    // SimpleIdentifier  ForEachStatement  Block
+    addTestSource('main(args) {for (^ foo in args) {}}');
+    computeFast();
+    return computeFull((bool result) {
+      expect(request.replacementOffset, completionOffset);
+      expect(request.replacementLength, 0);
+      assertNotSuggested('args');
+      assertNotSuggested('foo');
+      assertSuggestImportedClass('String');
+    });
+  }
+
+  test_ForEachStatement_loopVariable_type2() {
+    // DeclaredIdentifier  ForEachStatement  Block
+    addTestSource('main(args) {for (S^ foo in args) {}}');
+    computeFast();
+    return computeFull((bool result) {
+      expect(request.replacementOffset, completionOffset - 1);
+      expect(request.replacementLength, 1);
+      assertNotSuggested('args');
+      assertNotSuggested('foo');
+      assertSuggestImportedClass('String');
+    });
+  }
+
   test_FormalParameterList() {
     // FormalParameterList MethodDeclaration
     addTestSource('''