From 27dfbfeb85b47cf506ebae0a760895dd43e2b62d Mon Sep 17 00:00:00 2001
From: Scott Worley <scottworley@scottworley.com>
Date: Thu, 31 Aug 2023 11:01:08 -0700
Subject: [PATCH] Test writing twice

---
 tl-append-test.c | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/tl-append-test.c b/tl-append-test.c
index 0867280..6761b02 100644
--- a/tl-append-test.c
+++ b/tl-append-test.c
@@ -1,4 +1,5 @@
 #define _POSIX_C_SOURCE 2
+#include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -14,6 +15,14 @@ static void die_err(const char *message) {
   exit(1);
 }
 
+static void remove_logfile() {
+  if (remove("tl.log") != 0) {
+    if (errno != ENOENT) {
+      die_err("Error removing log file");
+    }
+  }
+}
+
 static void write_to_tl_append(const char *content) {
   FILE *p = popen("./tl-append", "w");
   if (p == NULL)
@@ -33,7 +42,8 @@ static void verify_log_contents(const char *contents) {
   FILE *f = fopen("tl.log", "r");
   if (f == NULL)
     die_err("Error opening log file");
-  if (fgets(buf, sizeof(buf), f) == NULL)
+  buf[fread(buf, 1, sizeof(buf), f)] = '\0';
+  if (ferror(f))
     die("Error reading log file");
   if (strncmp(contents, buf, sizeof(buf)) != 0)
     die("Wrong contents in log file");
@@ -42,8 +52,19 @@ static void verify_log_contents(const char *contents) {
 }
 
 static void write_and_read_line() {
+  remove_logfile();
   write_to_tl_append("foo\n");
   verify_log_contents("foo\n");
 }
 
-int main() { write_and_read_line(); }
+static void write_and_read_two_lines() {
+  remove_logfile();
+  write_to_tl_append("foo\n");
+  write_to_tl_append("bar\n");
+  verify_log_contents("foo\nbar\n");
+}
+
+int main() {
+  write_and_read_line();
+  write_and_read_two_lines();
+}
-- 
2.44.1