EDK: Add Dispatcher::SupportsEntrypointClass().

mojo/edk/system/shared_buffer_dispatcher_unittest.cc

Index: mojo/edk/system/shared_buffer_dispatcher_unittest.cc
diff --git a/mojo/edk/system/shared_buffer_dispatcher_unittest.cc b/mojo/edk/system/shared_buffer_dispatcher_unittest.cc
index b0cc9a4654d93264bb79abe42306962b91a9a3b1..276a0b4abec1b1b12b3c0cda3e7cd84397f96b28 100644
--- a/mojo/edk/system/shared_buffer_dispatcher_unittest.cc
+++ b/mojo/edk/system/shared_buffer_dispatcher_unittest.cc
@@ -183,6 +183,28 @@ TEST_F(SharedBufferDispatcherTest, CreateAndMapBuffer) {
   EXPECT_EQ('y', static_cast<char*>(mapping1->GetBase())[kSize / 2 + 1]);
 }
 
+TEST_F(SharedBufferDispatcherTest, SupportsEntrypointClass) {
+  MojoResult result = MOJO_RESULT_INTERNAL;
+  auto d = SharedBufferDispatcher::Create(
+      platform_support(), SharedBufferDispatcher::kDefaultCreateOptions, 100u,
+      &result);
+  ASSERT_TRUE(d);
+  EXPECT_EQ(MOJO_RESULT_OK, result);
+
+  EXPECT_FALSE(
+      d->SupportsEntrypointClass(Dispatcher::EntrypointClass::MESSAGE_PIPE));
+  EXPECT_FALSE(d->SupportsEntrypointClass(
+      Dispatcher::EntrypointClass::DATA_PIPE_PRODUCER));
+  EXPECT_FALSE(d->SupportsEntrypointClass(
+      Dispatcher::EntrypointClass::DATA_PIPE_CONSUMER));
+  EXPECT_TRUE(d->SupportsEntrypointClass(Dispatcher::EntrypointClass::BUFFER));
+
+  // TODO(vtl): Check that it actually returns |MOJO_RESULT_INVALID_ARGUMENT|
+  // for methods in unsupported entrypoint classes.
+
+  EXPECT_EQ(MOJO_RESULT_OK, d->Close());
+}
+
 TEST_F(SharedBufferDispatcherTest, DuplicateBufferHandle) {
   const uint64_t kSize = 100u;