1 /*
2 * Copyright (C) 2019 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 "gtest/gtest.h"
18
19 #include <stdint.h>
20
21 #include "chre/util/system/debug_dump.h"
22
23 using chre::DebugDumpWrapper;
24
25 static constexpr size_t kStandardBufferSize = 4000;
26
TEST(DebugDumpWrapper,ZeroBuffersInitially)27 TEST(DebugDumpWrapper, ZeroBuffersInitially) {
28 DebugDumpWrapper debugDump(kStandardBufferSize);
29 const auto &buffers = debugDump.getBuffers();
30 EXPECT_TRUE(buffers.empty());
31 }
32
TEST(DebugDumpWrapper,OneBufferForOneString)33 TEST(DebugDumpWrapper, OneBufferForOneString) {
34 DebugDumpWrapper debugDump(kStandardBufferSize);
35 const char *str = "Lorem ipsum";
36 debugDump.print("%s", str);
37 const auto &buffers = debugDump.getBuffers();
38 EXPECT_EQ(buffers.size(), 1);
39 EXPECT_TRUE(strcmp(buffers.front().get(), str) == 0);
40 }
41
TEST(DebugDumpWrapper,TwoStringsFitPerfectlyInOneBuffer)42 TEST(DebugDumpWrapper, TwoStringsFitPerfectlyInOneBuffer) {
43 DebugDumpWrapper debugDump(5);
44 const char *str1 = "ab";
45 const char *str2 = "cd";
46 debugDump.print("%s", str1);
47 debugDump.print("%s", str2);
48 const auto &buffers = debugDump.getBuffers();
49 EXPECT_EQ(buffers.size(), 1);
50 char bothStr[5];
51 strcpy(bothStr, str1);
52 strcat(bothStr, str2);
53 EXPECT_TRUE(strcmp(buffers.front().get(), bothStr) == 0);
54 }
55
TEST(DebugDumpWrapper,TooLargeOfStringToFit)56 TEST(DebugDumpWrapper, TooLargeOfStringToFit) {
57 DebugDumpWrapper debugDump(1);
58 const char *str = "a";
59 debugDump.print("%s", str);
60 const auto &buffers = debugDump.getBuffers();
61
62 // One null-terminated buffer will be created for an empty wrapper.
63 EXPECT_EQ(buffers.size(), 1);
64 EXPECT_TRUE(strcmp(buffers.back().get(), "") == 0);
65
66 // Once there's a buffer, it won't be updated.
67 debugDump.print("%s", str);
68 EXPECT_EQ(buffers.size(), 1);
69 EXPECT_TRUE(strcmp(buffers.back().get(), "") == 0);
70 }
71
TEST(DebugDumpWrapper,TooLargeOfStringWithPartlyFilledBuffer)72 TEST(DebugDumpWrapper, TooLargeOfStringWithPartlyFilledBuffer) {
73 DebugDumpWrapper debugDump(2);
74 const char *str1 = "a";
75 const char *str2 = "bc";
76 debugDump.print("%s", str1);
77 const auto &buffers = debugDump.getBuffers();
78 EXPECT_EQ(buffers.size(), 1);
79 debugDump.print("%s", str2);
80 EXPECT_EQ(buffers.size(), 1);
81 EXPECT_TRUE(strcmp(buffers.front().get(), str1) == 0);
82 }
83
TEST(DebugDumpWrapper,StringForcesNewBufferWithPartlyFilledBuffer)84 TEST(DebugDumpWrapper, StringForcesNewBufferWithPartlyFilledBuffer) {
85 DebugDumpWrapper debugDump(4);
86 const char *str1 = "ab";
87 const char *str2 = "bc";
88 debugDump.print("%s", str1);
89 debugDump.print("%s", str2);
90 const auto &buffers = debugDump.getBuffers();
91 EXPECT_EQ(buffers.size(), 2);
92 EXPECT_TRUE(strcmp(buffers.front().get(), str1) == 0);
93 EXPECT_TRUE(strcmp(buffers.back().get(), str2) == 0);
94 }
95
TEST(DebugDumpWrapper,ManyNewBuffersAllocated)96 TEST(DebugDumpWrapper, ManyNewBuffersAllocated) {
97 DebugDumpWrapper debugDump(kStandardBufferSize);
98 const char *str = "aaaaaaaaa";
99 // Should be 12000 chars added to debugDump
100 constexpr size_t kNumPrints = 1200;
101 for (size_t i = 0; i < kNumPrints; i++) {
102 debugDump.print("%s", str);
103 }
104 const auto &buffers = debugDump.getBuffers();
105 EXPECT_EQ(buffers.size(), 3);
106 }
107
TEST(DebugDumpWrapper,EmptyStringAllocsOneBuffer)108 TEST(DebugDumpWrapper, EmptyStringAllocsOneBuffer) {
109 DebugDumpWrapper debugDump(kStandardBufferSize);
110 debugDump.print("%s", "");
111 const auto &buffers = debugDump.getBuffers();
112 EXPECT_EQ(buffers.size(), 1);
113 }
114
TEST(DebugDumpWrapper,BuffersClear)115 TEST(DebugDumpWrapper, BuffersClear) {
116 DebugDumpWrapper debugDump(4);
117 const char *str1 = "ab";
118 const char *str2 = "cd";
119 const char *str3 = "ef";
120
121 debugDump.print("%s", str1);
122 debugDump.print("%s", str2);
123 const auto &buffers = debugDump.getBuffers();
124 EXPECT_EQ(buffers.size(), 2);
125 EXPECT_TRUE(strcmp(buffers.front().get(), str1) == 0);
126 EXPECT_TRUE(strcmp(buffers.back().get(), str2) == 0);
127
128 debugDump.clear();
129 EXPECT_EQ(buffers.size(), 0);
130
131 debugDump.print("%s", str3);
132 EXPECT_EQ(buffers.size(), 1);
133 EXPECT_TRUE(strcmp(buffers.front().get(), str3) == 0);
134 }
135
printVaList(DebugDumpWrapper * debugDump,const char * formatStr,...)136 void printVaList(DebugDumpWrapper *debugDump, const char *formatStr, ...) {
137 va_list args;
138 va_start(args, formatStr);
139 debugDump->printVaList(formatStr, args);
140 va_end(args);
141 }
142
TEST(DebugDumpWrapper,PrintVaListTwoStrings)143 TEST(DebugDumpWrapper, PrintVaListTwoStrings) {
144 DebugDumpWrapper debugDump(5);
145 const char *str1 = "ab";
146 const char *str2 = "cd";
147 printVaList(&debugDump, "%s", str1);
148 printVaList(&debugDump, "%s", str2);
149 const auto &buffers = debugDump.getBuffers();
150 EXPECT_EQ(buffers.size(), 1);
151 char bothStr[5];
152 strcpy(bothStr, str1);
153 strcat(bothStr, str2);
154 EXPECT_TRUE(strcmp(buffers.front().get(), bothStr) == 0);
155 }
156