1 //===-- Unittests for BlockStore ------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "src/__support/CPP/blockstore.h"
10 #include "utils/UnitTest/Test.h"
11 
12 struct Element {
13   int a;
14   long b;
15   unsigned c;
16 };
17 
18 class LlvmLibcBlockStoreTest : public __llvm_libc::testing::Test {
19 public:
20   template <size_t BLOCK_SIZE, size_t ELEMENT_COUNT, bool REVERSE>
21   void populate_and_iterate() {
22     __llvm_libc::cpp::BlockStore<Element, BLOCK_SIZE, REVERSE> block_store;
23     for (int i = 0; i < int(ELEMENT_COUNT); ++i)
24       block_store.push_back({i, 2 * i, 3 * unsigned(i)});
25     auto end = block_store.end();
26     int i = 0;
27     for (auto iter = block_store.begin(); iter != end; ++iter, ++i) {
28       Element &e = *iter;
29       if (REVERSE) {
30         int j = ELEMENT_COUNT - 1 - i;
31         ASSERT_EQ(e.a, j);
32         ASSERT_EQ(e.b, long(j * 2));
33         ASSERT_EQ(e.c, unsigned(j * 3));
34       } else {
35         ASSERT_EQ(e.a, i);
36         ASSERT_EQ(e.b, long(i * 2));
37         ASSERT_EQ(e.c, unsigned(i * 3));
38       }
39     }
40     ASSERT_EQ(i, int(ELEMENT_COUNT));
41     __llvm_libc::cpp::BlockStore<Element, BLOCK_SIZE, REVERSE>::destroy(
42         &block_store);
43   }
44 
45   template <bool REVERSE> void back_test() {
46     using __llvm_libc::cpp::BlockStore;
47     BlockStore<int, 4, REVERSE> block_store;
48     for (int i = 0; i < 20; i++)
49       block_store.push_back(i);
50     for (int i = 19; i >= 0; i--, block_store.pop_back())
51       ASSERT_EQ(block_store.back(), i);
52     block_store.destroy(&block_store);
53   }
54 
55   template <bool REVERSE> void empty_test() {
56     using __llvm_libc::cpp::BlockStore;
57     BlockStore<int, 2, REVERSE> block_store;
58 
59     ASSERT_TRUE(block_store.empty());
60     block_store.push_back(1);
61     for (int i = 0; i < 10; i++, block_store.push_back(1))
62       ASSERT_FALSE(block_store.empty());
63     block_store.destroy(&block_store);
64   }
65 };
66 
67 TEST_F(LlvmLibcBlockStoreTest, PopulateAndIterate4) {
68   populate_and_iterate<4, 4, false>();
69 }
70 
71 TEST_F(LlvmLibcBlockStoreTest, PopulateAndIterate8) {
72   populate_and_iterate<4, 8, false>();
73 }
74 
75 TEST_F(LlvmLibcBlockStoreTest, PopulateAndIterate10) {
76   populate_and_iterate<4, 10, false>();
77 }
78 
79 TEST_F(LlvmLibcBlockStoreTest, PopulateAndIterateReverse4) {
80   populate_and_iterate<4, 4, true>();
81 }
82 
83 TEST_F(LlvmLibcBlockStoreTest, PopulateAndIterateReverse8) {
84   populate_and_iterate<4, 8, true>();
85 }
86 
87 TEST_F(LlvmLibcBlockStoreTest, PopulateAndIterateReverse10) {
88   populate_and_iterate<4, 10, true>();
89 }
90 
91 TEST_F(LlvmLibcBlockStoreTest, Back) {
92   back_test<false>();
93   back_test<true>();
94 }
95 
96 TEST_F(LlvmLibcBlockStoreTest, Empty) {
97   empty_test<false>();
98   empty_test<true>();
99 }
100