Make the fuchsia mojo/public repo the source of truth.

mojo/public/c/tests/system/buffer_unittest.cc

-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// This file tests the C buffer API (the functions declared in
-// mojo/public/c/include/mojo/system/buffer.h).
-
-#include <mojo/system/buffer.h>
-
-#include <mojo/result.h>
-#include <mojo/system/handle.h>
-
-#include "gtest/gtest.h"
-
-namespace {
-
-const MojoHandleRights kDefaultSharedBufferHandleRights =
-    MOJO_HANDLE_RIGHT_DUPLICATE | MOJO_HANDLE_RIGHT_TRANSFER |
-    MOJO_HANDLE_RIGHT_GET_OPTIONS | MOJO_HANDLE_RIGHT_SET_OPTIONS |
-    MOJO_HANDLE_RIGHT_MAP_READABLE | MOJO_HANDLE_RIGHT_MAP_WRITABLE |
-    MOJO_HANDLE_RIGHT_MAP_EXECUTABLE;
-
-// The only handle that's guaranteed to be invalid is |MOJO_HANDLE_INVALID|.
-// Tests that everything that takes a handle properly recognizes it.
-TEST(BufferTest, InvalidHandle) {
-  MojoHandle out_handle = MOJO_HANDLE_INVALID;
-  EXPECT_EQ(
-      MOJO_RESULT_INVALID_ARGUMENT,
-      MojoDuplicateBufferHandle(MOJO_HANDLE_INVALID, nullptr, &out_handle));
-  MojoBufferInformation buffer_info = {};
-  EXPECT_EQ(
-      MOJO_RESULT_INVALID_ARGUMENT,
-      MojoGetBufferInformation(MOJO_HANDLE_INVALID, &buffer_info,
-                               static_cast<uint32_t>(sizeof(buffer_info))));
-  void* write_pointer = nullptr;
-  EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT,
-            MojoMapBuffer(MOJO_HANDLE_INVALID, 0u, 1u, &write_pointer,
-                          MOJO_MAP_BUFFER_FLAG_NONE));
-  // This isn't an "invalid handle" test, but we'll throw it in here anyway
-  // (since it involves a look-up).
-  EXPECT_EQ(MOJO_RESULT_INVALID_ARGUMENT, MojoUnmapBuffer(nullptr));
-}
-
-TEST(BufferTest, Basic) {
-  // Create a shared buffer (|h0|).
-  MojoHandle h0 = MOJO_HANDLE_INVALID;
-  EXPECT_EQ(MOJO_RESULT_OK, MojoCreateSharedBuffer(nullptr, 100, &h0));
-  EXPECT_NE(h0, MOJO_HANDLE_INVALID);
-
-  // The handle should have the correct rights.
-  MojoHandleRights rights = MOJO_HANDLE_RIGHT_NONE;
-  EXPECT_EQ(MOJO_RESULT_OK, MojoGetRights(h0, &rights));
-  EXPECT_EQ(kDefaultSharedBufferHandleRights, rights);
-
-  // Check information about the buffer from |h0|.
-  MojoBufferInformation info = {};
-  static const uint32_t kInfoSize = static_cast<uint32_t>(sizeof(info));
-  EXPECT_EQ(MOJO_RESULT_OK, MojoGetBufferInformation(h0, &info, kInfoSize));
-  EXPECT_EQ(kInfoSize, info.struct_size);
-  EXPECT_EQ(MOJO_BUFFER_INFORMATION_FLAG_NONE, info.flags);
-  EXPECT_EQ(100u, info.num_bytes);
-
-  // Map everything.
-  void* pointer = nullptr;
-  EXPECT_EQ(MOJO_RESULT_OK,
-            MojoMapBuffer(h0, 0, 100, &pointer, MOJO_MAP_BUFFER_FLAG_NONE));
-  ASSERT_TRUE(pointer);
-  static_cast<char*>(pointer)[50] = 'x';
-
-  // Duplicate |h0| to |h1|.
-  MojoHandle h1 = MOJO_HANDLE_INVALID;
-  EXPECT_EQ(MOJO_RESULT_OK, MojoDuplicateHandle(h0, &h1));
-  EXPECT_NE(h1, MOJO_HANDLE_INVALID);
-  EXPECT_NE(h1, h0);
-
-  // The new handle should have the correct rights.
-  rights = MOJO_HANDLE_RIGHT_NONE;
-  EXPECT_EQ(MOJO_RESULT_OK, MojoGetRights(h1, &rights));
-  EXPECT_EQ(kDefaultSharedBufferHandleRights, rights);
-
-  // Check information about the buffer from |h1|.
-  info = MojoBufferInformation();
-  EXPECT_EQ(MOJO_RESULT_OK, MojoGetBufferInformation(h1, &info, kInfoSize));
-  EXPECT_EQ(kInfoSize, info.struct_size);
-  EXPECT_EQ(MOJO_BUFFER_INFORMATION_FLAG_NONE, info.flags);
-  EXPECT_EQ(100u, info.num_bytes);
-
-  // Close |h0|.
-  EXPECT_EQ(MOJO_RESULT_OK, MojoClose(h0));
-
-  // The mapping should still be good.
-  static_cast<char*>(pointer)[51] = 'y';
-
-  // Unmap it.
-  EXPECT_EQ(MOJO_RESULT_OK, MojoUnmapBuffer(pointer));
-
-  // Map half of |h1|.
-  pointer = nullptr;
-  EXPECT_EQ(MOJO_RESULT_OK,
-            MojoMapBuffer(h1, 50, 50, &pointer, MOJO_MAP_BUFFER_FLAG_NONE));
-  ASSERT_TRUE(pointer);
-
-  // It should have what we wrote.
-  EXPECT_EQ('x', static_cast<char*>(pointer)[0]);
-  EXPECT_EQ('y', static_cast<char*>(pointer)[1]);
-
-  // Unmap it.
-  EXPECT_EQ(MOJO_RESULT_OK, MojoUnmapBuffer(pointer));
-
-  // Test duplication with reduced rights.
-  MojoHandle h2 = MOJO_HANDLE_INVALID;
-  EXPECT_EQ(MOJO_RESULT_OK, MojoDuplicateHandleWithReducedRights(
-                                h1, MOJO_HANDLE_RIGHT_DUPLICATE, &h2));
-  EXPECT_NE(h2, MOJO_HANDLE_INVALID);
-  EXPECT_NE(h2, h1);
-  // |h2| should have the correct rights.
-  rights = MOJO_HANDLE_RIGHT_NONE;
-  EXPECT_EQ(MOJO_RESULT_OK, MojoGetRights(h2, &rights));
-  EXPECT_EQ(kDefaultSharedBufferHandleRights & ~MOJO_HANDLE_RIGHT_DUPLICATE,
-            rights);
-  // Trying to duplicate |h2| should fail.
-  MojoHandle h3 = MOJO_HANDLE_INVALID;
-  EXPECT_EQ(MOJO_RESULT_PERMISSION_DENIED, MojoDuplicateHandle(h2, &h3));
-  EXPECT_EQ(MOJO_HANDLE_INVALID, h3);
-
-  EXPECT_EQ(MOJO_RESULT_OK, MojoClose(h1));
-  EXPECT_EQ(MOJO_RESULT_OK, MojoClose(h2));
-}
-
-// TODO(vtl): Add multi-threaded tests.
-
-}  // namespace