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