Mojo: re-organize public tests

mojo/public/tests/buffer_unittest.cc

-// Copyright 2013 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.
-
-#include "mojo/public/bindings/lib/bindings_serialization.h"
-#include "mojo/public/bindings/lib/buffer.h"
-#include "mojo/public/tests/simple_bindings_support.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace mojo {
-namespace test {
-
-bool IsZero(void* p_buf, size_t size) {
-  char* buf = reinterpret_cast<char*>(p_buf);
-  for (size_t i = 0; i < size; ++i) {
-    if (buf[i] != 0)
-      return false;
-  }
-  return true;
-}
-
-// Tests small and large allocations in ScratchBuffer.
-TEST(ScratchBufferTest, Basic) {
-  SimpleBindingsSupport bindings_support;
-
-  // Test that a small allocation is placed on the stack.
-  internal::ScratchBuffer buf;
-  void* small = buf.Allocate(10);
-  EXPECT_TRUE(small >= &buf && small < (&buf + sizeof(buf)));
-  EXPECT_TRUE(IsZero(small, 10));
-
-  // Large allocations won't be on the stack.
-  void* large = buf.Allocate(100*1024);
-  EXPECT_TRUE(IsZero(large, 100*1024));
-  EXPECT_FALSE(large >= &buf && large < (&buf + sizeof(buf)));
-
-  // But another small allocation should be back on the stack.
-  small = buf.Allocate(10);
-  EXPECT_TRUE(IsZero(small, 10));
-  EXPECT_TRUE(small >= &buf && small < (&buf + sizeof(buf)));
-}
-
-// Tests that Buffer::current() returns the correct value.
-TEST(ScratchBufferTest, Stacked) {
-  SimpleBindingsSupport bindings_support;
-
-  EXPECT_FALSE(Buffer::current());
-
-  {
-    internal::ScratchBuffer a;
-    EXPECT_EQ(&a, Buffer::current());
-
-    {
-      internal::ScratchBuffer b;
-      EXPECT_EQ(&b, Buffer::current());
-    }
-  }
-
-  EXPECT_FALSE(Buffer::current());
-}
-
-// Tests that FixedBuffer allocates memory aligned to 8 byte boundaries.
-TEST(FixedBufferTest, Alignment) {
-  SimpleBindingsSupport bindings_support;
-
-  internal::FixedBuffer buf(internal::Align(10) * 2);
-  ASSERT_EQ(buf.size(), 16u * 2);
-
-  void* a = buf.Allocate(10);
-  ASSERT_TRUE(a);
-  EXPECT_TRUE(IsZero(a, 10));
-  EXPECT_EQ(0, reinterpret_cast<ptrdiff_t>(a) % 8);
-
-  void* b = buf.Allocate(10);
-  ASSERT_TRUE(b);
-  EXPECT_TRUE(IsZero(b, 10));
-  EXPECT_EQ(0, reinterpret_cast<ptrdiff_t>(b) % 8);
-
-  // Any more allocations would result in an assert, but we can't test that.
-}
-
-// Tests that FixedBuffer::Leak passes ownership to the caller.
-TEST(FixedBufferTest, Leak) {
-  SimpleBindingsSupport bindings_support;
-
-  void* ptr = NULL;
-  void* buf_ptr = NULL;
-  {
-    internal::FixedBuffer buf(8);
-    ASSERT_EQ(8u, buf.size());
-
-    ptr = buf.Allocate(8);
-    ASSERT_TRUE(ptr);
-    void* buf_ptr = buf.Leak();
-
-    // The buffer should point to the first element allocated.
-    // TODO(mpcomplete): Is this a reasonable expectation?
-    EXPECT_EQ(ptr, buf_ptr);
-
-    // The FixedBuffer should be empty now.
-    EXPECT_EQ(0u, buf.size());
-    EXPECT_FALSE(buf.Leak());
-  }
-
-  // Since we called Leak, ptr is still writable after FixedBuffer went out of
-  // scope.
-  memset(ptr, 1, 8);
-  free(buf_ptr);
-}
-
-}  // namespace test
-}  // namespace mojo