1 /*
2 * Copyright (C) 2018 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "utils/base/arena.h"
18 #include "gtest/gtest.h"
19
20 namespace libtextclassifier3 {
21
TEST(Arena,Leakage)22 TEST(Arena, Leakage) {
23 UnsafeArena arena(32);
24 // Grab just 10 bytes.
25 EXPECT_EQ(arena.bytes_until_next_allocation(), 32);
26 const char* block = arena.Alloc(10);
27 EXPECT_NE(block, nullptr);
28 EXPECT_EQ(arena.bytes_until_next_allocation(), 22);
29 // Grab the rest.
30 const char* expected_next_block = block + 10;
31 const char* next_block = arena.Alloc(22);
32 // If the below test fails, a new block has been allocated for "next_block".
33 // This means that the last 22 bytes of the previous block have been lost.
34 EXPECT_EQ(next_block, expected_next_block);
35 EXPECT_EQ(arena.bytes_until_next_allocation(), 0);
36 // Try allocating a 0 bytes block. Arena should remain unchanged.
37 const char* null_block = arena.Alloc(0);
38 EXPECT_EQ(null_block, nullptr);
39 EXPECT_EQ(arena.bytes_until_next_allocation(), 0);
40 }
41
42 } // namespace libtextclassifier3
43