1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
#include <mbgl/test/util.hpp>
#include <mbgl/map/map.hpp>
#include <mbgl/gl/offscreen_view.hpp>
#include <mbgl/gl/headless_display.hpp>
#include <mbgl/util/logging.hpp>
#include <mbgl/util/image.hpp>
#include <mbgl/util/io.hpp>
#include <mbgl/util/chrono.hpp>
#include <mbgl/util/run_loop.hpp>
#include <mapbox/pixelmatch.hpp>
#include <csignal>
#include <future>
#include <unistd.h>
#ifndef NODE_EXECUTABLE
#define NODE_EXECUTABLE node
#endif
#define xstr(s) str(s)
#define str(s) #s
namespace mbgl {
namespace test {
Server::Server(const char* script) {
int input[2];
int output[2];
if (pipe(input)) {
throw std::runtime_error("Cannot create server input pipe");
}
if (pipe(output)) {
throw std::runtime_error("Cannot create server output pipe");
}
// Store the parent => child pipe so that we can close it in the destructor.
fd = input[1];
pid_t pid = fork();
if (pid < 0) {
Log::Error(Event::Setup, "Cannot create server process");
exit(1);
} else if (pid == 0) {
// This is the child process.
// Connect the parent => child pipe to stdin.
while ((dup2(input[0], STDIN_FILENO) == -1) && (errno == EINTR)) {}
close(input[0]);
close(input[1]);
// Move the child => parent side of the pipe to stdout.
while ((dup2(output[1], STDOUT_FILENO) == -1) && (errno == EINTR)) {}
close(output[1]);
close(output[0]);
const char* executable = xstr(NODE_EXECUTABLE);
fprintf(stderr, "executable: %s\n", executable);
// Launch the actual server process.
int ret = execl(executable, executable, script, nullptr);
// This call should not return. In case execl failed, we exit anyway.
if (ret < 0) {
Log::Error(Event::Setup, "Failed to start server: %s", strerror(errno));
}
abort();
} else {
// This is the parent process.
// Close the unneeded sides of the pipes.
close(output[1]);
close(input[0]);
// Wait until the server process sends at least 2 bytes or closes the handle.
char buffer[2];
ssize_t bytes, total = 0;
while (total < 2 && (bytes = read(output[0], buffer + total, 2 - total)) != 0) {
total += bytes;
}
// Close child => parent pipe.
close(output[0]);
// Check signature
if (total != 2 || strncmp(buffer, "OK", 2) != 0) {
throw std::runtime_error("Failed to start server: Invalid signature");
}
}
}
Server::~Server() {
if (fd > 0) {
close(fd);
}
}
std::shared_ptr<HeadlessDisplay> sharedDisplay() {
static auto display = std::make_shared<HeadlessDisplay>();
return display;
}
PremultipliedImage render(Map& map, OffscreenView& view) {
PremultipliedImage result;
map.renderStill([&](std::exception_ptr) {
result = view.readStillImage();
});
while (!result.valid()) {
util::RunLoop::Get()->runOnce();
}
return result;
}
void checkImage(const std::string& base,
const PremultipliedImage& actual,
double imageThreshold,
double pixelThreshold) {
#if !TEST_READ_ONLY
if (getenv("UPDATE")) {
util::write_file(base + "/expected.png", encodePNG(actual));
return;
}
#endif
std::string expected_image;
try {
expected_image = util::read_file(base + "/expected.png");
} catch (std::exception& ex) {
Log::Error(Event::Setup, "Failed to load expected image %s: %s",
(base + "/expected.png").c_str(), ex.what());
throw;
}
PremultipliedImage expected = decodeImage(expected_image);
PremultipliedImage diff { expected.size };
#if !TEST_READ_ONLY
util::write_file(base + "/actual.png", encodePNG(actual));
#endif
ASSERT_EQ(expected.size, actual.size);
double pixels = mapbox::pixelmatch(actual.data.get(),
expected.data.get(),
expected.size.width,
expected.size.height,
diff.data.get(),
pixelThreshold);
EXPECT_LE(pixels / (expected.size.width * expected.size.height), imageThreshold);
#if !TEST_READ_ONLY
util::write_file(base + "/diff.png", encodePNG(diff));
#endif
}
} // namespace test
} // namespace mbgl
|
