1 /*
2 * Copyright (C) 2017 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 <stdint.h>
18 #include <string.h>
19
20 #include <vector>
21
22 #include <gtest/gtest.h>
23
24 #include "Memory.h"
25
26 #include "MemoryFake.h"
27
28 class MemoryRangeTest : public ::testing::Test {
29 protected:
SetUp()30 void SetUp() override {
31 memory_ = new MemoryFake;
32 }
33
34 MemoryFake* memory_;
35 };
36
TEST_F(MemoryRangeTest,read)37 TEST_F(MemoryRangeTest, read) {
38 std::vector<uint8_t> src(1024);
39 memset(src.data(), 0x4c, 1024);
40 memory_->SetMemory(9001, src);
41
42 MemoryRange range(memory_, 9001, 9001 + src.size());
43
44 std::vector<uint8_t> dst(1024);
45 ASSERT_TRUE(range.Read(0, dst.data(), src.size()));
46 for (size_t i = 0; i < 1024; i++) {
47 ASSERT_EQ(0x4cU, dst[i]) << "Failed at byte " << i;
48 }
49 }
50
TEST_F(MemoryRangeTest,read_near_limit)51 TEST_F(MemoryRangeTest, read_near_limit) {
52 std::vector<uint8_t> src(4096);
53 memset(src.data(), 0x4c, 4096);
54 memory_->SetMemory(1000, src);
55
56 MemoryRange range(memory_, 1000, 2024);
57
58 std::vector<uint8_t> dst(1024);
59 ASSERT_TRUE(range.Read(1020, dst.data(), 4));
60 for (size_t i = 0; i < 4; i++) {
61 ASSERT_EQ(0x4cU, dst[i]) << "Failed at byte " << i;
62 }
63
64 // Verify that reads outside of the range will fail.
65 ASSERT_FALSE(range.Read(1020, dst.data(), 5));
66 ASSERT_FALSE(range.Read(1024, dst.data(), 1));
67 ASSERT_FALSE(range.Read(1024, dst.data(), 1024));
68 }
69
TEST_F(MemoryRangeTest,read_string_past_end)70 TEST_F(MemoryRangeTest, read_string_past_end) {
71 std::string name("0123456789");
72 memory_->SetMemory(0, name);
73
74 // Verify a read past the range fails.
75 MemoryRange range(memory_, 0, 5);
76 std::string dst_name;
77 ASSERT_FALSE(range.ReadString(0, &dst_name));
78 }
79
TEST_F(MemoryRangeTest,read_string_to_end)80 TEST_F(MemoryRangeTest, read_string_to_end) {
81 std::string name("0123456789");
82 memory_->SetMemory(30, name);
83
84 // Verify the range going to the end of the string works.
85 MemoryRange range(memory_, 30, 30 + name.size() + 1);
86 std::string dst_name;
87 ASSERT_TRUE(range.ReadString(0, &dst_name));
88 ASSERT_EQ("0123456789", dst_name);
89 }
90
TEST_F(MemoryRangeTest,read_string_fencepost)91 TEST_F(MemoryRangeTest, read_string_fencepost) {
92 std::string name("0123456789");
93 memory_->SetMemory(10, name);
94
95 // Verify the range set to one byte less than the end of the string fails.
96 MemoryRange range(memory_, 10, 10 + name.size());
97 std::string dst_name;
98 ASSERT_FALSE(range.ReadString(0, &dst_name));
99 }
100