From 2994cd6c2cb1103613f3116ef7c371a64ae5221f Mon Sep 17 00:00:00 2001
From: Mattias Andrée <maandree@kth.se>
Date: Sun, 26 Aug 2018 19:09:45 +0200
Subject: Add test for putenvf
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Signed-off-by: Mattias Andrée <maandree@kth.se>
---
 Makefile    |  1 +
 libsimple.h |  2 +-
 vputenvf.c  | 39 ++++++++++++++++++++++++++++++++++-----
 3 files changed, 36 insertions(+), 6 deletions(-)

diff --git a/Makefile b/Makefile
index 048d690..d235867 100644
--- a/Makefile
+++ b/Makefile
@@ -88,6 +88,7 @@ TESTS =\
 	timespectostr.test\
 	timevaltostr.test\
 	vasprintf.test\
+	vputenvf.test\
 	libsimple.test
 
 all: libsimple.a $(TESTS)
diff --git a/libsimple.h b/libsimple.h
index 371cd83..3a18365 100644
--- a/libsimple.h
+++ b/libsimple.h
@@ -1224,7 +1224,7 @@ void libsimple_envputenvf(int, const char *, va_list);
 
 _LIBSIMPLE_GCC_ONLY(__attribute__((__nonnull__, __format__(__printf__, 1, 2))))
 static inline int
-libsimple_putenvf(const char *__fmt, ...) /* TODO test */
+libsimple_putenvf(const char *__fmt, ...)
 {
 	va_list __ap;
 	va_start(__ap, __fmt);
diff --git a/vputenvf.c b/vputenvf.c
index 5a70c6b..0d66b0c 100644
--- a/vputenvf.c
+++ b/vputenvf.c
@@ -1,9 +1,10 @@
 /* See LICENSE file for copyright and license details. */
 #include "libsimple.h"
+#ifndef TEST
 
 
 int
-libsimple_vputenvf(const char *fmt, va_list ap) /* TODO test */
+libsimple_vputenvf(const char *fmt, va_list ap)
 {
 	va_list ap2;
 	int n;
@@ -13,11 +14,39 @@ libsimple_vputenvf(const char *fmt, va_list ap) /* TODO test */
 	va_end(ap2);
 	if (n < 0)
 		return -1;
-	if ((size_t)n == SIZE_MAX) {
-		errno = ENOMEM;
-		return -1;
-	}
 	s = alloca((size_t)n + 1);
 	vsprintf(s, fmt, ap);
 	return putenv(s);
 }
+
+
+#else
+#include "test.h"
+
+int
+main(void)
+{
+	unsetenv("X");
+	assert(!getenv("X"));
+	unsetenv("Y");
+	assert(!getenv("Y"));
+
+	putenvf("X=xyz");
+	assert(!strcmpnul(getenv("X"), "xyz"));
+	putenvf("Y=xyz");
+	assert(!strcmpnul(getenv("Y"), "xyz"));
+
+	putenvf("X=x%sz", "abc");
+	assert(!strcmpnul(getenv("X"), "xabcz"));
+	putenvf("Y=x%sz", "abc");
+	assert(!strcmpnul(getenv("Y"), "xabcz"));
+
+	putenvf("X=%ix%sz%i", 10, "abc", -11);
+	assert(!strcmpnul(getenv("X"), "10xabcz-11"));
+	putenvf("Y=%ix%sz%i", 10, "abc", -11);
+	assert(!strcmpnul(getenv("Y"), "10xabcz-11"));
+
+	return 0;
+}
+
+#endif
-- 
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