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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/util/file_area_freelist.h>
#include <vespa/vespalib/gtest/gtest.h>
using vespalib::alloc::FileAreaFreeList;
class FileAreaFreeListTest : public ::testing::Test
{
protected:
FileAreaFreeList _freelist;
static constexpr auto bad_offset = FileAreaFreeList::bad_offset;
public:
FileAreaFreeListTest();
~FileAreaFreeListTest();
void test_merge_area_blocked(bool previous);
};
FileAreaFreeListTest::FileAreaFreeListTest()
: _freelist()
{
}
FileAreaFreeListTest::~FileAreaFreeListTest() = default;
void
FileAreaFreeListTest::test_merge_area_blocked(bool previous)
{
_freelist.add_premmapped_area(4, 1);
_freelist.add_premmapped_area(5, 1);
EXPECT_EQ(4, _freelist.alloc(1));
EXPECT_EQ(5, _freelist.alloc(1));
if (previous) {
_freelist.free(4, 1);
_freelist.free(5, 1);
} else {
_freelist.free(5, 1);
_freelist.free(4, 1);
}
EXPECT_EQ(bad_offset, _freelist.alloc(2));
_freelist.remove_premmapped_area(4, 1);
_freelist.remove_premmapped_area(5, 1);
}
TEST_F(FileAreaFreeListTest, empty_freelist_is_ok)
{
EXPECT_EQ(bad_offset, _freelist.alloc(1));
}
TEST_F(FileAreaFreeListTest, can_reuse_free_area)
{
_freelist.free(4, 1);
EXPECT_EQ(4, _freelist.alloc(1));
EXPECT_EQ(bad_offset, _freelist.alloc(1));
}
TEST_F(FileAreaFreeListTest, merge_area_with_next_area)
{
_freelist.free(5, 1);
_freelist.free(4, 1);
EXPECT_EQ(4, _freelist.alloc(2));
EXPECT_EQ(bad_offset, _freelist.alloc(1));
}
TEST_F(FileAreaFreeListTest, merge_area_with_next_area_blocked_by_fence)
{
test_merge_area_blocked(false);
}
TEST_F(FileAreaFreeListTest, merge_area_with_previous_area)
{
_freelist.free(3, 1);
_freelist.free(4, 1);
EXPECT_EQ(3, _freelist.alloc(2));
EXPECT_EQ(bad_offset, _freelist.alloc(1));
}
TEST_F(FileAreaFreeListTest, merge_area_with_previous_area_blocked_by_fence)
{
test_merge_area_blocked(true);
}
TEST_F(FileAreaFreeListTest, merge_area_with_previous_and_next_area)
{
_freelist.free(5, 1);
_freelist.free(3, 1);
_freelist.free(4, 1);
EXPECT_EQ(3, _freelist.alloc(3));
EXPECT_EQ(bad_offset, _freelist.alloc(1));
}
TEST_F(FileAreaFreeListTest, can_use_part_of_free_area)
{
_freelist.free(4, 2);
EXPECT_EQ(4, _freelist.alloc(1));
EXPECT_EQ(5, _freelist.alloc(1));
EXPECT_EQ(bad_offset, _freelist.alloc(1));
}
GTEST_MAIN_RUN_ALL_TESTS()
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