Move //mojo/{public, edk} underneath //third_party

mojo/edk/embedder/simple_platform_shared_buffer_unittest.cc

-// Copyright 2014 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/edk/embedder/simple_platform_shared_buffer.h"
-
-#include <limits>
-
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace mojo {
-namespace embedder {
-namespace {
-
-TEST(SimplePlatformSharedBufferTest, Basic) {
-  const size_t kNumInts = 100;
-  const size_t kNumBytes = kNumInts * sizeof(int);
-  // A fudge so that we're not just writing zero bytes 75% of the time.
-  const int kFudge = 1234567890;
-
-  // Make some memory.
-  scoped_refptr<SimplePlatformSharedBuffer> buffer(
-      SimplePlatformSharedBuffer::Create(kNumBytes));
-  ASSERT_TRUE(buffer);
-
-  // Map it all, scribble some stuff, and then unmap it.
-  {
-    EXPECT_TRUE(buffer->IsValidMap(0, kNumBytes));
-    scoped_ptr<PlatformSharedBufferMapping> mapping(buffer->Map(0, kNumBytes));
-    ASSERT_TRUE(mapping);
-    ASSERT_TRUE(mapping->GetBase());
-    int* stuff = static_cast<int*>(mapping->GetBase());
-    for (size_t i = 0; i < kNumInts; i++)
-      stuff[i] = static_cast<int>(i) + kFudge;
-  }
-
-  // Map it all again, check that our scribbling is still there, then do a
-  // partial mapping and scribble on that, check that everything is coherent,
-  // unmap the first mapping, scribble on some of the second mapping, and then
-  // unmap it.
-  {
-    ASSERT_TRUE(buffer->IsValidMap(0, kNumBytes));
-    // Use |MapNoCheck()| this time.
-    scoped_ptr<PlatformSharedBufferMapping> mapping1(
-        buffer->MapNoCheck(0, kNumBytes));
-    ASSERT_TRUE(mapping1);
-    ASSERT_TRUE(mapping1->GetBase());
-    int* stuff1 = static_cast<int*>(mapping1->GetBase());
-    for (size_t i = 0; i < kNumInts; i++)
-      EXPECT_EQ(static_cast<int>(i) + kFudge, stuff1[i]) << i;
-
-    scoped_ptr<PlatformSharedBufferMapping> mapping2(
-        buffer->Map((kNumInts / 2) * sizeof(int), 2 * sizeof(int)));
-    ASSERT_TRUE(mapping2);
-    ASSERT_TRUE(mapping2->GetBase());
-    int* stuff2 = static_cast<int*>(mapping2->GetBase());
-    EXPECT_EQ(static_cast<int>(kNumInts / 2) + kFudge, stuff2[0]);
-    EXPECT_EQ(static_cast<int>(kNumInts / 2) + 1 + kFudge, stuff2[1]);
-
-    stuff2[0] = 123;
-    stuff2[1] = 456;
-    EXPECT_EQ(123, stuff1[kNumInts / 2]);
-    EXPECT_EQ(456, stuff1[kNumInts / 2 + 1]);
-
-    mapping1.reset();
-
-    EXPECT_EQ(123, stuff2[0]);
-    EXPECT_EQ(456, stuff2[1]);
-    stuff2[1] = 789;
-  }
-
-  // Do another partial mapping and check that everything is the way we expect
-  // it to be.
-  {
-    EXPECT_TRUE(buffer->IsValidMap(sizeof(int), kNumBytes - sizeof(int)));
-    scoped_ptr<PlatformSharedBufferMapping> mapping(
-        buffer->Map(sizeof(int), kNumBytes - sizeof(int)));
-    ASSERT_TRUE(mapping);
-    ASSERT_TRUE(mapping->GetBase());
-    int* stuff = static_cast<int*>(mapping->GetBase());
-
-    for (size_t j = 0; j < kNumInts - 1; j++) {
-      int i = static_cast<int>(j) + 1;
-      if (i == kNumInts / 2) {
-        EXPECT_EQ(123, stuff[j]);
-      } else if (i == kNumInts / 2 + 1) {
-        EXPECT_EQ(789, stuff[j]);
-      } else {
-        EXPECT_EQ(i + kFudge, stuff[j]) << i;
-      }
-    }
-  }
-}
-
-// TODO(vtl): Bigger buffers.
-
-TEST(SimplePlatformSharedBufferTest, InvalidMappings) {
-  scoped_refptr<SimplePlatformSharedBuffer> buffer(
-      SimplePlatformSharedBuffer::Create(100));
-  ASSERT_TRUE(buffer);
-
-  // Zero length not allowed.
-  EXPECT_FALSE(buffer->Map(0, 0));
-  EXPECT_FALSE(buffer->IsValidMap(0, 0));
-
-  // Okay:
-  EXPECT_TRUE(buffer->Map(0, 100));
-  EXPECT_TRUE(buffer->IsValidMap(0, 100));
-  // Offset + length too big.
-  EXPECT_FALSE(buffer->Map(0, 101));
-  EXPECT_FALSE(buffer->IsValidMap(0, 101));
-  EXPECT_FALSE(buffer->Map(1, 100));
-  EXPECT_FALSE(buffer->IsValidMap(1, 100));
-
-  // Okay:
-  EXPECT_TRUE(buffer->Map(50, 50));
-  EXPECT_TRUE(buffer->IsValidMap(50, 50));
-  // Offset + length too big.
-  EXPECT_FALSE(buffer->Map(50, 51));
-  EXPECT_FALSE(buffer->IsValidMap(50, 51));
-  EXPECT_FALSE(buffer->Map(51, 50));
-  EXPECT_FALSE(buffer->IsValidMap(51, 50));
-}
-
-TEST(SimplePlatformSharedBufferTest, TooBig) {
-  // If |size_t| is 32-bit, it's quite possible/likely that |Create()| succeeds
-  // (since it only involves creating a 4 GB file).
-  const size_t kMaxSizeT = std::numeric_limits<size_t>::max();
-  scoped_refptr<SimplePlatformSharedBuffer> buffer(
-      SimplePlatformSharedBuffer::Create(kMaxSizeT));
-  // But, assuming |sizeof(size_t) == sizeof(void*)|, mapping all of it should
-  // always fail.
-  if (buffer)
-    EXPECT_FALSE(buffer->Map(0, kMaxSizeT));
-}
-
-// Tests that separate mappings get distinct addresses.
-// Note: It's not inconceivable that the OS could ref-count identical mappings
-// and reuse the same address, in which case we'd have to be more careful about
-// using the address as the key for unmapping.
-TEST(SimplePlatformSharedBufferTest, MappingsDistinct) {
-  scoped_refptr<SimplePlatformSharedBuffer> buffer(
-      SimplePlatformSharedBuffer::Create(100));
-  scoped_ptr<PlatformSharedBufferMapping> mapping1(buffer->Map(0, 100));
-  scoped_ptr<PlatformSharedBufferMapping> mapping2(buffer->Map(0, 100));
-  EXPECT_NE(mapping1->GetBase(), mapping2->GetBase());
-}
-
-TEST(SimplePlatformSharedBufferTest, BufferZeroInitialized) {
-  static const size_t kSizes[] = {10, 100, 1000, 10000, 100000};
-  for (size_t i = 0; i < arraysize(kSizes); i++) {
-    scoped_refptr<SimplePlatformSharedBuffer> buffer(
-        SimplePlatformSharedBuffer::Create(kSizes[i]));
-    scoped_ptr<PlatformSharedBufferMapping> mapping(buffer->Map(0, kSizes[i]));
-    for (size_t j = 0; j < kSizes[i]; j++) {
-      // "Assert" instead of "expect" so we don't spam the output with thousands
-      // of failures if we fail.
-      ASSERT_EQ('\0', static_cast<char*>(mapping->GetBase())[j])
-          << "size " << kSizes[i] << ", offset " << j;
-    }
-  }
-}
-
-TEST(SimplePlatformSharedBufferTest, MappingsOutliveBuffer) {
-  scoped_ptr<PlatformSharedBufferMapping> mapping1;
-  scoped_ptr<PlatformSharedBufferMapping> mapping2;
-
-  {
-    scoped_refptr<SimplePlatformSharedBuffer> buffer(
-        SimplePlatformSharedBuffer::Create(100));
-    mapping1 = buffer->Map(0, 100).Pass();
-    mapping2 = buffer->Map(50, 50).Pass();
-    static_cast<char*>(mapping1->GetBase())[50] = 'x';
-  }
-
-  EXPECT_EQ('x', static_cast<char*>(mapping2->GetBase())[0]);
-
-  static_cast<char*>(mapping2->GetBase())[1] = 'y';
-  EXPECT_EQ('y', static_cast<char*>(mapping1->GetBase())[51]);
-}
-
-}  // namespace
-}  // namespace embedder
-}  // namespace mojo