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 "androidfw/FileStream.h"
18 #include "androidfw/StringPiece.h"
19
20 #include "android-base/file.h"
21 #include "android-base/macros.h"
22
23 #include "gmock/gmock.h"
24 #include "gtest/gtest.h"
25
26 using ::android::StringPiece;
27 using ::testing::Eq;
28 using ::testing::NotNull;
29 using ::testing::StrEq;
30
31 namespace android {
32
TEST(FileInputStreamTest,NextAndBackup)33 TEST(FileInputStreamTest, NextAndBackup) {
34 std::string input = "this is a cool string";
35 TemporaryFile file;
36 ASSERT_THAT(TEMP_FAILURE_RETRY(write(file.fd, input.c_str(), input.size())), Eq(21));
37 lseek64(file.fd, 0, SEEK_SET);
38
39 // Use a small buffer size so that we can call Next() a few times.
40 FileInputStream in(file.release(), 10u);
41 ASSERT_FALSE(in.HadError());
42 EXPECT_THAT(in.ByteCount(), Eq(0u));
43
44 const void* buffer;
45 size_t size;
46 ASSERT_TRUE(in.Next(&buffer, &size)) << in.GetError();
47 ASSERT_THAT(size, Eq(10u));
48 ASSERT_THAT(buffer, NotNull());
49 EXPECT_THAT(in.ByteCount(), Eq(10u));
50 EXPECT_THAT(StringPiece(reinterpret_cast<const char*>(buffer), size), Eq("this is a "));
51
52 ASSERT_TRUE(in.Next(&buffer, &size));
53 ASSERT_THAT(size, Eq(10u));
54 ASSERT_THAT(buffer, NotNull());
55 EXPECT_THAT(in.ByteCount(), Eq(20u));
56 EXPECT_THAT(StringPiece(reinterpret_cast<const char*>(buffer), size), Eq("cool strin"));
57
58 in.BackUp(5u);
59 EXPECT_THAT(in.ByteCount(), Eq(15u));
60
61 ASSERT_TRUE(in.Next(&buffer, &size));
62 ASSERT_THAT(size, Eq(5u));
63 ASSERT_THAT(buffer, NotNull());
64 ASSERT_THAT(in.ByteCount(), Eq(20u));
65 EXPECT_THAT(StringPiece(reinterpret_cast<const char*>(buffer), size), Eq("strin"));
66
67 // Backup 1 more than possible. Should clamp.
68 in.BackUp(11u);
69 EXPECT_THAT(in.ByteCount(), Eq(10u));
70
71 ASSERT_TRUE(in.Next(&buffer, &size));
72 ASSERT_THAT(size, Eq(10u));
73 ASSERT_THAT(buffer, NotNull());
74 ASSERT_THAT(in.ByteCount(), Eq(20u));
75 EXPECT_THAT(StringPiece(reinterpret_cast<const char*>(buffer), size), Eq("cool strin"));
76
77 ASSERT_TRUE(in.Next(&buffer, &size));
78 ASSERT_THAT(size, Eq(1u));
79 ASSERT_THAT(buffer, NotNull());
80 ASSERT_THAT(in.ByteCount(), Eq(21u));
81 EXPECT_THAT(StringPiece(reinterpret_cast<const char*>(buffer), size), Eq("g"));
82
83 EXPECT_FALSE(in.Next(&buffer, &size));
84 EXPECT_FALSE(in.HadError());
85 }
86
TEST(FileOutputStreamTest,NextAndBackup)87 TEST(FileOutputStreamTest, NextAndBackup) {
88 const std::string input = "this is a cool string";
89
90 TemporaryFile file;
91
92 FileOutputStream out(file.fd, 10u);
93 ASSERT_FALSE(out.HadError());
94 EXPECT_THAT(out.ByteCount(), Eq(0u));
95
96 void* buffer;
97 size_t size;
98 ASSERT_TRUE(out.Next(&buffer, &size));
99 ASSERT_THAT(size, Eq(10u));
100 ASSERT_THAT(buffer, NotNull());
101 EXPECT_THAT(out.ByteCount(), Eq(10u));
102 memcpy(reinterpret_cast<char*>(buffer), input.c_str(), size);
103
104 ASSERT_TRUE(out.Next(&buffer, &size));
105 ASSERT_THAT(size, Eq(10u));
106 ASSERT_THAT(buffer, NotNull());
107 EXPECT_THAT(out.ByteCount(), Eq(20u));
108 memcpy(reinterpret_cast<char*>(buffer), input.c_str() + 10u, size);
109
110 ASSERT_TRUE(out.Next(&buffer, &size));
111 ASSERT_THAT(size, Eq(10u));
112 ASSERT_THAT(buffer, NotNull());
113 EXPECT_THAT(out.ByteCount(), Eq(30u));
114 reinterpret_cast<char*>(buffer)[0] = input[20u];
115 out.BackUp(size - 1);
116 EXPECT_THAT(out.ByteCount(), Eq(21u));
117
118 ASSERT_TRUE(out.Flush());
119
120 lseek64(file.fd, 0, SEEK_SET);
121
122 std::string actual;
123 ASSERT_TRUE(android::base::ReadFdToString(file.fd, &actual));
124 EXPECT_THAT(actual, StrEq(input));
125 }
126
127 } // namespace android
128