1 /*
2 * Copyright (C) 2013 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 "file_output_stream.h"
18 #include "vector_output_stream.h"
19
20 #include "base/unix_file/fd_file.h"
21 #include "base/logging.h"
22 #include "base/stl_util.h"
23 #include "buffered_output_stream.h"
24 #include "common_runtime_test.h"
25
26 namespace art {
27
28 class OutputStreamTest : public CommonRuntimeTest {
29 protected:
CheckOffset(off_t expected)30 void CheckOffset(off_t expected) {
31 off_t actual = output_stream_->Seek(0, kSeekCurrent);
32 EXPECT_EQ(expected, actual);
33 }
34
SetOutputStream(OutputStream & output_stream)35 void SetOutputStream(OutputStream& output_stream) {
36 output_stream_ = &output_stream;
37 }
38
GenerateTestOutput()39 void GenerateTestOutput() {
40 EXPECT_EQ(3, output_stream_->Seek(3, kSeekCurrent));
41 CheckOffset(3);
42 EXPECT_EQ(2, output_stream_->Seek(2, kSeekSet));
43 CheckOffset(2);
44 uint8_t buf[] = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
45 EXPECT_TRUE(output_stream_->WriteFully(buf, 2));
46 CheckOffset(4);
47 EXPECT_EQ(6, output_stream_->Seek(2, kSeekEnd));
48 CheckOffset(6);
49 EXPECT_TRUE(output_stream_->WriteFully(buf, 4));
50 CheckOffset(10);
51 EXPECT_TRUE(output_stream_->WriteFully(buf, 6));
52 EXPECT_TRUE(output_stream_->Flush());
53 }
54
CheckTestOutput(const std::vector<uint8_t> & actual)55 void CheckTestOutput(const std::vector<uint8_t>& actual) {
56 uint8_t expected[] = {
57 0, 0, 1, 2, 0, 0, 1, 2, 3, 4, 1, 2, 3, 4, 5, 6
58 };
59 EXPECT_EQ(sizeof(expected), actual.size());
60 EXPECT_EQ(0, memcmp(expected, &actual[0], actual.size()));
61 }
62
63 OutputStream* output_stream_;
64 };
65
TEST_F(OutputStreamTest,File)66 TEST_F(OutputStreamTest, File) {
67 ScratchFile tmp;
68 FileOutputStream output_stream(tmp.GetFile());
69 SetOutputStream(output_stream);
70 GenerateTestOutput();
71 std::unique_ptr<File> in(OS::OpenFileForReading(tmp.GetFilename().c_str()));
72 EXPECT_TRUE(in.get() != nullptr);
73 std::vector<uint8_t> actual(in->GetLength());
74 bool readSuccess = in->ReadFully(&actual[0], actual.size());
75 EXPECT_TRUE(readSuccess);
76 CheckTestOutput(actual);
77 }
78
TEST_F(OutputStreamTest,Buffered)79 TEST_F(OutputStreamTest, Buffered) {
80 ScratchFile tmp;
81 {
82 BufferedOutputStream buffered_output_stream(MakeUnique<FileOutputStream>(tmp.GetFile()));
83 SetOutputStream(buffered_output_stream);
84 GenerateTestOutput();
85 }
86 std::unique_ptr<File> in(OS::OpenFileForReading(tmp.GetFilename().c_str()));
87 EXPECT_TRUE(in.get() != nullptr);
88 std::vector<uint8_t> actual(in->GetLength());
89 bool readSuccess = in->ReadFully(&actual[0], actual.size());
90 EXPECT_TRUE(readSuccess);
91 CheckTestOutput(actual);
92 }
93
TEST_F(OutputStreamTest,Vector)94 TEST_F(OutputStreamTest, Vector) {
95 std::vector<uint8_t> output;
96 VectorOutputStream output_stream("test vector output", &output);
97 SetOutputStream(output_stream);
98 GenerateTestOutput();
99 CheckTestOutput(output);
100 }
101
TEST_F(OutputStreamTest,BufferedFlush)102 TEST_F(OutputStreamTest, BufferedFlush) {
103 struct CheckingOutputStream : OutputStream {
104 CheckingOutputStream()
105 : OutputStream("dummy"),
106 flush_called(false) { }
107 ~CheckingOutputStream() OVERRIDE {}
108
109 bool WriteFully(const void* buffer ATTRIBUTE_UNUSED,
110 size_t byte_count ATTRIBUTE_UNUSED) OVERRIDE {
111 LOG(FATAL) << "UNREACHABLE";
112 UNREACHABLE();
113 }
114
115 off_t Seek(off_t offset ATTRIBUTE_UNUSED, Whence whence ATTRIBUTE_UNUSED) OVERRIDE {
116 LOG(FATAL) << "UNREACHABLE";
117 UNREACHABLE();
118 }
119
120 bool Flush() OVERRIDE {
121 flush_called = true;
122 return true;
123 }
124
125 bool flush_called;
126 };
127
128 std::unique_ptr<CheckingOutputStream> cos = MakeUnique<CheckingOutputStream>();
129 CheckingOutputStream* checking_output_stream = cos.get();
130 BufferedOutputStream buffered(std::move(cos));
131 ASSERT_FALSE(checking_output_stream->flush_called);
132 bool flush_result = buffered.Flush();
133 ASSERT_TRUE(flush_result);
134 ASSERT_TRUE(checking_output_stream->flush_called);
135 }
136
137 } // namespace art
138