tests

test/classes_test.dart

@@ -0,0 +1,71 @@
+// Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'package:test/test.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+
+import 'dartdoc_test_base.dart';
+import 'src/utils.dart';
+
+void main() {
+  defineReflectiveSuite(() {
+    defineReflectiveTests(ClassesTest);
+  });
+}
+
+@reflectiveTest
+class ClassesTest extends DartdocTestBase {
+  @override
+  String get libraryName => 'classes';
+
+  void test_publicInterfaces_direct() async {
+    var library = await bootPackageWithLibrary('''
+class A {}
+class B implements A {}
+''');
+
+    var b = library.classes.named('B');
+    expect(b.publicInterfaces, hasLength(1));
+    expect(b.publicInterfaces.first.modelElement, library.classes.named('A'));
+  }
+
+  void test_publicInterfaces_indirect() async {
+    var library = await bootPackageWithLibrary('''
+class A {}
+class B implements A {}
+class C implements B {}
+''');
+
+    var c = library.classes.named('C');
+    // Only `B` is shown, not indirect-through-public like `A`.
+    expect(c.publicInterfaces, hasLength(1));
+    expect(c.publicInterfaces.first.modelElement, library.classes.named('B'));
+  }
+
+  void test_publicInterfaces_indirectViaPrivate() async {
+    var library = await bootPackageWithLibrary('''
+class A {}
+class _B implements A {}
+class C implements _B {}
+''');
+
+    var c = library.classes.named('C');
+    expect(c.publicInterfaces, hasLength(1));
+    expect(c.publicInterfaces.first.modelElement, library.classes.named('A'));
+  }
+
+  void test_publicInterfaces_indirectViaPrivate_multiply() async {
+    var library = await bootPackageWithLibrary('''
+class A<T> {}
+class _B<U> implements A<U> {}
+class C<T> implements A<T>, _B<T> {}
+''');
+
+    var c = library.classes.named('C');
+    expect(c.publicInterfaces, hasLength(1));
+    expect(c.publicInterfaces.first.modelElement, library.classes.named('A'));
+  }
+
+  // TODO(srawlins): Test everything else about classes.
+}