From 05d2a9c66d6d77326bcdda5607d6a1cc119a16da Mon Sep 17 00:00:00 2001
From: yasuoka <>
Date: Sun, 25 May 2025 00:20:54 +0000
Subject: Add tests for the functions in <stdio_ext.h>.

---
 src/regress/lib/libc/stdio/test___freading.c | 85 ++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 src/regress/lib/libc/stdio/test___freading.c

(limited to 'src/regress/lib/libc/stdio/test___freading.c')

diff --git a/src/regress/lib/libc/stdio/test___freading.c b/src/regress/lib/libc/stdio/test___freading.c
new file mode 100644
index 0000000000..05716f3a38
--- /dev/null
+++ b/src/regress/lib/libc/stdio/test___freading.c
@@ -0,0 +1,85 @@
+/*	$OpenBSD: test___freading.c,v 1.1 2025/05/25 00:20:54 yasuoka Exp $	*/
+
+/*
+ * Copyright (c) 2025 YASUOKA Masahiko <yasuoka@yasuoka.net>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdio_ext.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* we use assert() */
+#undef	NDEBUG
+
+#define	TMPFILENAME	"test___freading.tmp"
+
+void test___freading0(void);
+void test___freading1(void);
+
+void
+test___freading0(void)
+{
+	FILE	*fp;
+	int	 r;
+	char	 buf[80];
+
+	fp = popen("echo Hello world", "r");
+	assert(fp != NULL);
+	assert(__freading(fp) != 0);
+	assert(fgets(buf, sizeof(buf), fp) != NULL);
+	assert(strcmp(buf, "Hello world\n") == 0);
+	r = pclose(fp);
+	assert(r == 0);
+}
+
+void
+test___freading1(void)
+{
+	FILE	*fp;
+	int	 r;
+
+	/* when the last operaiton is read, __freading() returns true */
+	fp = fopen(TMPFILENAME, "w+");
+	assert(fp != NULL);
+	assert(__freading(fp) == 0);
+	r = fputs("Hello world\n", fp);
+	assert(r >= 0);
+	assert(__freading(fp) == 0);
+	rewind(fp);
+	assert(fgetc(fp) == 'H');
+	assert(__freading(fp) != 0);
+	/* write */
+	fseek(fp, 0, SEEK_END);
+	r = fputs("\n", fp);
+	assert(__freading(fp) == 0);
+	/* ungetc */
+	rewind(fp);
+	assert(ungetc('X', fp) != 0);
+	assert(__freading(fp) != 0);	/* reading */
+
+	r = fclose(fp);
+	assert(r == 0);
+}
+
+int
+main(int argc, char *argv[])
+{
+	test___freading0();
+	test___freading1();
+
+	exit(0);
+}
-- 
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