diff -r 000000000000 -r 6474c204b198 nsprpub/pr/tests/prfdbl.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nsprpub/pr/tests/prfdbl.c	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,29 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * This is a simple test of the PR_fprintf() function for doubles.
+ */
+
+#include "prprf.h"
+
+int main()
+{
+    double pi = 3.1415926;
+    double e = 2.71828;
+    double root2 = 1.414;
+    double zero = 0.0;
+    double nan = zero / zero;
+
+    PR_fprintf(PR_STDOUT, "pi is %f.\n", pi);
+    PR_fprintf(PR_STDOUT, "e is %f.\n", e);
+    PR_fprintf(PR_STDOUT, "The square root of 2 is %f.\n", root2);
+    PR_fprintf(PR_STDOUT, "NaN is %f.\n", nan);
+
+    PR_fprintf(PR_STDOUT, "pi is %301f.\n", pi);
+    PR_fprintf(PR_STDOUT, "e is %65416.123f.\n", e);
+    PR_fprintf(PR_STDOUT, "e is %0000000000000000000065416.123f.\n", e);
+    PR_fprintf(PR_STDOUT, "NaN is %1024.1f.\n", nan);
+    return 0;
+}