third_party/WebKit/Source/platform/PODArenaTest.cpp

   1 /*
   2  * Copyright (C) 2010 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  *
   8  * 1.  Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  * 2.  Redistributions in binary form must reproduce the above copyright
  11  *     notice, this list of conditions and the following disclaimer in the
  12  *     documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  16  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  17  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  18  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  19  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  20  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  21  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "platform/PODArena.h"
  28
  29 #include "platform/testing/ArenaTestHelpers.h"
  30 #include "wtf/FastMalloc.h"
  31 #include "wtf/RefPtr.h"
  32 #include <algorithm>
  33 #include <gtest/gtest.h>
  34
  35 namespace blink {
  36
  37 using ArenaTestHelpers::TrackedAllocator;
  38
  39 namespace {
  40
  41 // A couple of simple structs to allocate.
  42 struct TestClass1 {
  43     TestClass1()
  44         : x(0), y(0), z(0), w(1) { }
  45
  46     float x, y, z, w;
  47 };
  48
  49 struct TestClass2 {
  50     TestClass2()
  51         : a(1), b(2), c(3), d(4) { }
  52
  53     float a, b, c, d;
  54 };
  55
  56 } // anonymous namespace
  57
  58 class PODArenaTest : public testing::Test {
  59 };
  60
  61 // Make sure the arena can successfully allocate from more than one
  62 // region.
  63 TEST_F(PODArenaTest, CanAllocateFromMoreThanOneRegion)
  64 {
  65     RefPtr<TrackedAllocator> allocator = TrackedAllocator::create();
  66     RefPtr<PODArena> arena = PODArena::create(allocator);
  67     int numIterations = 10 * PODArena::DefaultChunkSize / sizeof(TestClass1);
  68     for (int i = 0; i < numIterations; ++i)
  69         arena->allocateObject<TestClass1>();
  70     EXPECT_GT(allocator->numRegions(), 1);
  71 }
  72
  73 // Make sure the arena frees all allocated regions during destruction.
  74 TEST_F(PODArenaTest, FreesAllAllocatedRegions)
  75 {
  76     RefPtr<TrackedAllocator> allocator = TrackedAllocator::create();
  77     {
  78         RefPtr<PODArena> arena = PODArena::create(allocator);
  79         for (int i = 0; i < 3; i++)
  80             arena->allocateObject<TestClass1>();
  81         EXPECT_GT(allocator->numRegions(), 0);
  82     }
  83     EXPECT_TRUE(allocator->isEmpty());
  84 }
  85
  86 // Make sure the arena runs constructors of the objects allocated within.
  87 TEST_F(PODArenaTest, RunsConstructors)
  88 {
  89     RefPtr<PODArena> arena = PODArena::create();
  90     for (int i = 0; i < 10000; i++) {
  91         TestClass1* tc1 = arena->allocateObject<TestClass1>();
  92         EXPECT_EQ(0, tc1->x);
  93         EXPECT_EQ(0, tc1->y);
  94         EXPECT_EQ(0, tc1->z);
  95         EXPECT_EQ(1, tc1->w);
  96         TestClass2* tc2 = arena->allocateObject<TestClass2>();
  97         EXPECT_EQ(1, tc2->a);
  98         EXPECT_EQ(2, tc2->b);
  99         EXPECT_EQ(3, tc2->c);
 100         EXPECT_EQ(4, tc2->d);
 101     }
 102 }
 103
 104 } // namespace blink