Split mojo/public/cpp/system/tests/core_unittest.cc, part 1.

mojo/public/cpp/system/tests/handle_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++ wrappers in mojo/public/cpp/system/handle.h.
+
+#include "mojo/public/cpp/system/handle.h"
+
+#include <map>
+#include <utility>
+
+#include "mojo/public/cpp/system/buffer.h"
+#include "mojo/public/cpp/system/macros.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace mojo {
+namespace {
+
+// Basic |Handle| tests.
+TEST(HandleTest, Handle) {
+  EXPECT_EQ(MOJO_HANDLE_INVALID, kInvalidHandleValue);
+
+  Handle h0;
+  EXPECT_EQ(kInvalidHandleValue, h0.value());
+  EXPECT_EQ(kInvalidHandleValue, *h0.mutable_value());
+  EXPECT_FALSE(h0.is_valid());
+
+  Handle h1(static_cast<MojoHandle>(123));
+  EXPECT_EQ(static_cast<MojoHandle>(123), h1.value());
+  EXPECT_EQ(static_cast<MojoHandle>(123), *h1.mutable_value());
+  EXPECT_TRUE(h1.is_valid());
+  *h1.mutable_value() = static_cast<MojoHandle>(456);
+  EXPECT_EQ(static_cast<MojoHandle>(456), h1.value());
+  EXPECT_TRUE(h1.is_valid());
+
+  h1.swap(h0);
+  EXPECT_EQ(static_cast<MojoHandle>(456), h0.value());
+  EXPECT_TRUE(h0.is_valid());
+  EXPECT_FALSE(h1.is_valid());
+
+  h1.set_value(static_cast<MojoHandle>(789));
+  h0.swap(h1);
+  EXPECT_EQ(static_cast<MojoHandle>(789), h0.value());
+  EXPECT_TRUE(h0.is_valid());
+  EXPECT_EQ(static_cast<MojoHandle>(456), h1.value());
+  EXPECT_TRUE(h1.is_valid());
+
+  // Make sure copy constructor works.
+  Handle h2(h0);
+  EXPECT_EQ(static_cast<MojoHandle>(789), h2.value());
+  // And assignment.
+  h2 = h1;
+  EXPECT_EQ(static_cast<MojoHandle>(456), h2.value());
+
+  // Make sure that we can put |Handle|s into |std::map|s.
+  h0 = Handle(static_cast<MojoHandle>(987));
+  h1 = Handle(static_cast<MojoHandle>(654));
+  h2 = Handle(static_cast<MojoHandle>(321));
+  Handle h3;
+  std::map<Handle, int> handle_to_int;
+  handle_to_int[h0] = 0;
+  handle_to_int[h1] = 1;
+  handle_to_int[h2] = 2;
+  handle_to_int[h3] = 3;
+
+  EXPECT_EQ(4u, handle_to_int.size());
+  EXPECT_FALSE(handle_to_int.find(h0) == handle_to_int.end());
+  EXPECT_EQ(0, handle_to_int[h0]);
+  EXPECT_FALSE(handle_to_int.find(h1) == handle_to_int.end());
+  EXPECT_EQ(1, handle_to_int[h1]);
+  EXPECT_FALSE(handle_to_int.find(h2) == handle_to_int.end());
+  EXPECT_EQ(2, handle_to_int[h2]);
+  EXPECT_FALSE(handle_to_int.find(h3) == handle_to_int.end());
+  EXPECT_EQ(3, handle_to_int[h3]);
+  EXPECT_TRUE(handle_to_int.find(Handle(static_cast<MojoHandle>(13579))) ==
+              handle_to_int.end());
+
+  // TODO(vtl): With C++11, support |std::unordered_map|s, etc.
+}
+
+// Basic |ScopedHandle| tests.
+TEST(HandleTest, ScopedHandle) {
+  // Invalid |ScopedHandle|:
+  {
+    ScopedHandle sh0;
+
+    EXPECT_EQ(kInvalidHandleValue, sh0.get().value());
+    EXPECT_FALSE(sh0.is_valid());
+
+    // This should be a no-op.
+    Close(sh0.Pass());
+
+    // It should still be invalid.
+    EXPECT_FALSE(sh0.is_valid());
+
+    // Move constructible:
+    ScopedHandle sh1(std::move(sh0));
+    EXPECT_FALSE(sh0.is_valid());
+    EXPECT_FALSE(sh1.is_valid());
+
+    // Move assignable:
+    sh0 = std::move(sh1);
+    EXPECT_FALSE(sh0.is_valid());
+    EXPECT_FALSE(sh1.is_valid());
+  }
+
+  // "Valid" |ScopedHandle| (but note that we can't test that it closes the
+  // handle on leaving scope without having a valid handle!):
+  {
+    Handle h0(static_cast<MojoHandle>(123));
+    ScopedHandle sh0(h0);
+
+    EXPECT_EQ(h0.value(), sh0.get().value());
+    EXPECT_TRUE(sh0.is_valid());
+
+    // Move constructible:
+    ScopedHandle sh1(std::move(sh0));
+    EXPECT_FALSE(sh0.is_valid());
+    EXPECT_TRUE(sh1.is_valid());
+
+    // Move assignable:
+    sh0 = std::move(sh1);
+    EXPECT_TRUE(sh0.is_valid());
+    EXPECT_FALSE(sh1.is_valid());
+
+    // We have to release |sh0|, since it's not really valid.
+    Handle h1 = sh0.release();
+    EXPECT_EQ(h0.value(), h1.value());
+  }
+}
+
+TEST(HandleTest, MakeScopedHandle) {
+  EXPECT_FALSE(MakeScopedHandle(Handle()).is_valid());
+
+  Handle h(static_cast<MojoHandle>(123));
+  auto sh = MakeScopedHandle(h);
+  EXPECT_TRUE(sh.is_valid());
+  EXPECT_EQ(h.value(), sh.get().value());
+  // Have to release |sh0|, since it's not really valid.
+  ignore_result(sh.release());
+}
+
+TEST(HandleTest, ScopedHandleMoveCtor) {
+  // We'll use a shared buffer handle (since we need a valid handle) in a
+  // |ScopedSharedBufferHandle|.
+  ScopedSharedBufferHandle buffer1;
+  EXPECT_EQ(MOJO_RESULT_OK, CreateSharedBuffer(nullptr, 1024, &buffer1));
+  EXPECT_TRUE(buffer1.is_valid());
+
+  ScopedSharedBufferHandle buffer2;
+  EXPECT_EQ(MOJO_RESULT_OK, CreateSharedBuffer(nullptr, 1024, &buffer2));
+  EXPECT_TRUE(buffer2.is_valid());
+
+  // If this fails to close buffer1, ScopedHandleBase::CloseIfNecessary() will
+  // assert.
+  buffer1 = buffer2.Pass();
+
+  EXPECT_TRUE(buffer1.is_valid());
+  EXPECT_FALSE(buffer2.is_valid());
+}
+
+TEST(HandleTest, ScopedHandleMoveCtorSelf) {
+  // We'll use a shared buffer handle (since we need a valid handle) in a
+  // |ScopedSharedBufferHandle|.
+  ScopedSharedBufferHandle buffer1;
+  EXPECT_EQ(MOJO_RESULT_OK, CreateSharedBuffer(nullptr, 1024, &buffer1));
+  EXPECT_TRUE(buffer1.is_valid());
+
+  buffer1 = buffer1.Pass();
+
+  EXPECT_TRUE(buffer1.is_valid());
+}
+
+}  // namespace mojo
+}  // namespace