respect show/hide combinators when generating suggestions

pkg/analysis_services/test/completion/imported_type_computer_test.dart

Index: pkg/analysis_services/test/completion/imported_type_computer_test.dart
diff --git a/pkg/analysis_services/test/completion/imported_type_computer_test.dart b/pkg/analysis_services/test/completion/imported_type_computer_test.dart
index 869dfc8c95a19bba8a33485315743edf58208b4e..a6361f6437402462aadfaeadda001088403e1a3e 100644
--- a/pkg/analysis_services/test/completion/imported_type_computer_test.dart
+++ b/pkg/analysis_services/test/completion/imported_type_computer_test.dart
@@ -38,6 +38,50 @@ class ImportedTypeComputerTest extends AbstractCompletionTest {
     });
   }
 
+  test_class_importHide() {
+    addSource('/testA.dart', 'class A { } class B { }');
+    addTestSource('import "/testA.dart" hide ^; class C {}');
+    return computeFull().then((_) {
+      assertSuggestClass('A');
+      assertSuggestClass('B');
+      assertNotSuggested('Object');
+    });
+  }
+
+  test_class_importShow() {
+    addSource('/testA.dart', 'class A { } class B { }');
+    addTestSource('import "/testA.dart" show ^; class C {}');
+    return computeFull().then((_) {
+      // only suggest elements listed in show combinator
+      assertSuggestClass('A');
+      assertSuggestClass('B');
+      assertNotSuggested('Object');
+    });
+  }
+
+  test_class_importShowWithPart() {
+    addSource('/testB.dart', 'part of libA;  class B { }');
+    addSource('/testA.dart', 'part "/testB.dart"; class A { }');
+    addTestSource('import "/testA.dart" show ^; class C {}');
+    return computeFull().then((_) {
+      // only suggest elements listed in show combinator
+      assertSuggestClass('A');
+      assertSuggestClass('B');
+      assertNotSuggested('Object');
+    });
+  }
+
+  test_class_importedWithHide() {
+    addSource('/testA.dart', 'class A { } class B { }');
+    addTestSource('import "/testA.dart" hide B; class C {foo(){^}}');
+    return computeFull().then((_) {
+      // exclude elements listed in hide combinator
+      assertSuggestClass('A');
+      assertNotSuggested('B');
+      assertSuggestClass('Object');
+    });
+  }
+
   test_class_importedWithPrefix() {
     addSource('/testA.dart', 'class A { }');
     addTestSource('import "/testA.dart" as foo; class C {foo(){^}}');
@@ -49,6 +93,17 @@ class ImportedTypeComputerTest extends AbstractCompletionTest {
     });
   }
 
+  test_class_importedWithShow() {
+    addSource('/testA.dart', 'class A { } class B { }');
+    addTestSource('import "/testA.dart" show A; class C {foo(){^}}');
+    return computeFull().then((_) {
+      // only suggest elements listed in show combinator
+      assertSuggestClass('A');
+      assertNotSuggested('B');
+      assertSuggestClass('Object');
+    });
+  }
+
   test_class_notImported() {
     addSource('/testA.dart', 'class A {int x;} class _B { }');
     addTestSource('class C {foo(){^}}');