Suggest 'is' in 'if (x is^)'.

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

Index: pkg/analysis_server/test/services/completion/dart/keyword_contributor_test.dart
diff --git a/pkg/analysis_server/test/services/completion/dart/keyword_contributor_test.dart b/pkg/analysis_server/test/services/completion/dart/keyword_contributor_test.dart
index f06faec56017adf1a4b707b2214274f3f09cf2e2..10eb19116588d4f6ad90be5b48a8f3c15e1a6a54 100644
--- a/pkg/analysis_server/test/services/completion/dart/keyword_contributor_test.dart
+++ b/pkg/analysis_server/test/services/completion/dart/keyword_contributor_test.dart
@@ -865,6 +865,18 @@ class A {
         pseudoKeywords: ['await', 'yield', 'yield*']);
   }
 
+  test_if_condition_isKeyword() async {
+    addTestSource('main() { if (v i^) {} }');
+    await computeSuggestions();
+    assertSuggestKeywords([Keyword.IS], relevance: DART_RELEVANCE_HIGH);
+  }
+
+  test_if_condition_isKeyword2() async {
+    addTestSource('main() { if (v i^ && false) {} }');
+    await computeSuggestions();
+    assertSuggestKeywords([Keyword.IS], relevance: DART_RELEVANCE_HIGH);
+  }
+
   test_if_expression_in_class() async {
     addTestSource('class A {foo() {if (^) }}');
     await computeSuggestions();