test: Add test case for fpurge(NULL)

diff --git a/test/fpurge.c b/test/fpurge.c
index 8f2e9963bbf31fa61fa7a0e6bb789543cb89ca35..03f107fb15ac579687fd478c660ecb2454b6ad43 100644 (file)
--- a/test/fpurge.c
+++ b/test/fpurge.c
@@ -32,6 +32,9 @@ main()
        static FILE fp_bad;
        FILE *fp;
 
+       if (fpurge(NULL) == 0)
+               return 1;
+
        if (fpurge(&fp_bad) == 0)
                return 1;