From 751247d2cdcf3f64aa27da0dc9801169b78abec5 Mon Sep 17 00:00:00 2001
From: James Y Knight <jyknight@google.com>
Date: Mon, 22 Jul 2019 22:57:39 -0400
Subject: [PATCH] Add tests for <error.h> functions.

---
 src/functional/error.c | 68 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 src/functional/error.c

diff --git a/src/functional/error.c b/src/functional/error.c
new file mode 100644
index 0000000..e0b063c
--- /dev/null
+++ b/src/functional/error.c
@@ -0,0 +1,68 @@
+#include <error.h>
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include "test.h"
+
+#define ASSERT(c) do { \
+	errno = 0; \
+	if (!(c)) { \
+		t_error("%s failed (errno: %s)\n", #c, strerror(errno)); \
+		exit(1); \
+	} \
+} while(0)
+
+void my_print_progname(void) {
+	fputs("Progname:", stderr);
+}
+
+const char *expected_output =
+		"src/functional/error.exe: Test1\n"
+		"src/functional/error.exe:File:44: Test2 hello\n"
+		"Progname:File:44: Test3 4\n"
+		"Progname:Test4 hello: No such file or directory\n"
+		"Progname:OtherFile:44: Test6\n"
+		"Progname:OtherFile:47: Test7\n"
+		"error_message_count:6\n"
+		"Progname:Last error\n";
+
+int main() {
+        int fd, pid, status;
+	int pipefds[2];
+	ASSERT(pipe(pipefds) == 0);
+
+	ASSERT((pid = fork()) >= 0);
+	if (pid == 0) {
+		ASSERT(dup2(pipefds[1], 1) == 1);
+		ASSERT(dup2(pipefds[1], 2) == 2);
+
+		error(0, 0, "Test1");
+		error_at_line(0, 0, "File", 44, "Test2 %s", "hello");
+
+		error_print_progname = my_print_progname;
+
+		error_one_per_line = 1;
+		error_at_line(0, 0, "File", 44, "Test3 %d", 4);
+		error(0, ENOENT, "Test4 %s", "hello");
+		error_at_line(0, 0, "File", 44, "Test5 (skipped)");
+		error_at_line(0, 0, "OtherFile", 44, "Test6");
+		error_at_line(0, 0, "OtherFile", 47, "Test7");
+		printf("error_message_count:%d\n", error_message_count);
+		error(77, 0, "Last error");
+	}
+	ASSERT(waitpid(pid, &status, 0) == pid);
+	ASSERT(WIFEXITED(status) && WEXITSTATUS(status) == 77);
+
+	char buf[1000];
+	ssize_t count;
+	ASSERT((count = read(pipefds[0], buf, sizeof(buf)-1)) >= 0);
+	buf[count] = 0;
+	if (strcmp(buf, expected_output)) {
+		t_error("Unexpected output. Got:\n%s\n", buf);
+	}
+	return t_status;
+}
-- 
2.22.0.657.g960e92d24f-goog