Add FileState.hasMixin/hasMixinLibrary properties.

pkg/front_end/test/src/incremental/file_state_test.dart

Index: pkg/front_end/test/src/incremental/file_state_test.dart
diff --git a/pkg/front_end/test/src/incremental/file_state_test.dart b/pkg/front_end/test/src/incremental/file_state_test.dart
index 9e9f391cdbb9f3246d7f021711017fc15b8ad3d5..7232e95bc0ebf78491ab51c13cb13bbe98c37485 100644
--- a/pkg/front_end/test/src/incremental/file_state_test.dart
+++ b/pkg/front_end/test/src/incremental/file_state_test.dart
@@ -284,6 +284,116 @@ export "c.dart" show A, B, C, D hide C show A, D;
     }
   }
 
+  test_hasMixinApplication_false() async {
+    writeFile(
+        '/a.dart',
+        r'''
+class A {}
+class B extends Object with A {}
+''');
+    var uri = writeFile(
+        '/test.dart',
+        r'''
+import 'a.dart';
+class T1 extends A {}
+class T2 extends B {}
+''');
+    FileState file = await fsState.getFile(uri);
+    expect(file.hasMixinApplication, isFalse);
+  }
+
+  test_hasMixinApplication_true_class() async {
+    var uri = writeFile(
+        '/test.dart',
+        r'''
+class A {}
+class B extends Object with A {}
+''');
+    FileState file = await fsState.getFile(uri);
+    expect(file.hasMixinApplication, isTrue);
+  }
+
+  test_hasMixinApplication_true_named() async {
+    var uri = writeFile(
+        '/test.dart',
+        r'''
+class A {}
+class B = Object with A;
+''');
+    FileState file = await fsState.getFile(uri);
+    expect(file.hasMixinApplication, isTrue);
+  }
+
+  test_hasMixinApplicationLibrary_false() async {
+    var partUri = writeFile(
+        '/part.dart',
+        r'''
+part of test;
+class A {}
+''');
+    var libUri = writeFile(
+        '/test.dart',
+        r'''
+library test;
+part 'part.dart';
+class B extends A {}
+''');
+
+    FileState part = await fsState.getFile(partUri);
+    FileState lib = await fsState.getFile(libUri);
+
+    expect(part.hasMixinApplication, isFalse);
+    expect(lib.hasMixinApplication, isFalse);
+    expect(lib.hasMixinApplicationLibrary, isFalse);
+  }
+
+  test_hasMixinApplicationLibrary_true_inDefiningUnit() async {
+    var partUri = writeFile(
+        '/part.dart',
+        r'''
+part of test;
+class A {}
+''');
+    var libUri = writeFile(
+        '/test.dart',
+        r'''
+library test;
+part 'part.dart';
+class B extends Object with A {}
+''');
+
+    FileState part = await fsState.getFile(partUri);
+    FileState lib = await fsState.getFile(libUri);
+
+    expect(part.hasMixinApplication, isFalse);
+    expect(lib.hasMixinApplication, isTrue);
+    expect(lib.hasMixinApplicationLibrary, isTrue);
+  }
+
+  test_hasMixinApplicationLibrary_true_inPart() async {
+    var partUri = writeFile(
+        '/part.dart',
+        r'''
+part of test;
+class A {}
+class B extends Object with A {}
+''');
+    var libUri = writeFile(
+        '/test.dart',
+        r'''
+library test;
+part 'part.dart';
+class C {}
+''');
+
+    FileState part = await fsState.getFile(partUri);
+    FileState lib = await fsState.getFile(libUri);
+
+    expect(part.hasMixinApplication, isTrue);
+    expect(lib.hasMixinApplication, isFalse);
+    expect(lib.hasMixinApplicationLibrary, isTrue);
+  }
+
   test_newFileListener() async {
     var a = writeFile('/a.dart', '');
     var b = writeFile('/b.dart', '');