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[test] Use system 'diff' on POSIX.

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This commit is contained in:
Fangrui Song 2018-01-27 22:31:17 -08:00
parent 70bbe6c64c
commit 45b57bd729
1 changed files with 34 additions and 3 deletions
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37
src/test.cc
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@ -6,8 +6,15 @@
#include "utils.h"
#include <stdio.h>
#include <stdlib.h>
#include <iostream>
// The 'diff' utility is available and we can use dprintf(3).
#if _POSIX_C_SOURCE >= 200809L
#include <sys/wait.h>
#include <unistd.h>
#endif
void Write(const std::vector<std::string>& strs) {
for (const std::string& str : strs)
std::cout << str << std::endl;
@ -31,14 +38,38 @@ void DiffDocuments(std::string path,
rapidjson::Document& expected,
rapidjson::Document& actual) {
std::string joined_actual_output = ToString(actual);
std::string joined_expected_output = ToString(expected);
std::cout << "[FAILED] " << path << " (section " << path_section << ")"
<< std::endl;
#if _POSIX_C_SOURCE >= 200809L
char expected_file[] = "/tmp/cquery.expected.XXXXXX";
char actual_file[] = "/tmp/cquery.actual.XXXXXX";
int expected_fd = mkstemp(expected_file);
int actual_fd = mkstemp(actual_file);
dprintf(expected_fd, "%s", joined_expected_output.c_str());
dprintf(actual_fd, "%s", joined_actual_output.c_str());
close(expected_fd);
close(actual_fd);
pid_t child = fork();
if (child == 0) {
execlp("diff", "diff", "-U", "3", expected_file, actual_file, NULL);
_Exit(127);
} else {
int status;
waitpid(child, &status, 0);
unlink(expected_file);
unlink(actual_file);
// 'diff' returns 0 or 1 if exitted normaly.
if (WEXITSTATUS(status) <= 1)
return;
}
#endif
std::vector<std::string> actual_output =
SplitString(joined_actual_output, "\n");
std::string joined_expected_output = ToString(expected);
std::vector<std::string> expected_output =
SplitString(joined_expected_output, "\n");
std::cout << "[FAILED] " << path << " (section " << path_section << ")"
<< std::endl;
std::cout << "Expected output for " << path << " (section " << path_section
<< "):" << std::endl;
std::cout << joined_expected_output << std::endl;