improved xvasprintf self test

[Simon Josefsson]

Inspired by

http://www.gnu.org/software/gnulib/coverage/gllib/xvasprintf.c.gcov.frameset.html

I improved the xvasprintf self-check below.

/Simon

>From e718463703e9f7a3d60eeb360fca7efb2562c6b2 Mon Sep 17 00:00:00 2001
From: Simon Josefsson <address@hidden>
Date: Fri, 13 Nov 2009 10:53:06 +0100
Subject: [PATCH] test-xvasprintf: Add %s%s related checks.

---
 ChangeLog               |    4 ++++
 tests/test-xvasprintf.c |   38 ++++++++++++++++++++++++++++++++++++--
 2 files changed, 40 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 405bfda..34915a0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2009-11-13  Simon Josefsson  <address@hidden>
+
+       * tests/test-xvasprintf.c: Add %s%s related checks.
+
 2009-11-12  Eric Blake  <address@hidden>
 
        version-etc: match standards.texi style
diff --git a/tests/test-xvasprintf.c b/tests/test-xvasprintf.c
index 3760314..5296b67 100644
--- a/tests/test-xvasprintf.c
+++ b/tests/test-xvasprintf.c
@@ -55,28 +55,62 @@ static void
 test_xvasprintf (void)
 {
   int repeat;
+  char *result;
 
   for (repeat = 0; repeat <= 8; repeat++)
     {
-      char *result = my_xasprintf ("%d", 12345);
+      result = my_xasprintf ("%d", 12345);
       ASSERT (result != NULL);
       ASSERT (strcmp (result, "12345") == 0);
       free (result);
     }
+
+  result = my_xasprintf ("");
+  ASSERT (result != NULL);
+  ASSERT (strcmp (result, "") == 0);
+
+  result = my_xasprintf ("%s", "foo");
+  ASSERT (result != NULL);
+  ASSERT (strcmp (result, "foo") == 0);
+
+  result = my_xasprintf ("%s%s", "foo", "bar");
+  ASSERT (result != NULL);
+  ASSERT (strcmp (result, "foobar") == 0);
+
+  result = my_xasprintf ("%s%sbaz", "foo", "bar");
+  ASSERT (result != NULL);
+  ASSERT (strcmp (result, "foobarbaz") == 0);
 }
 
 static void
 test_xasprintf ()
 {
   int repeat;
+  char *result;
 
   for (repeat = 0; repeat <= 8; repeat++)
     {
-      char *result = xasprintf ("%d", 12345);
+      result = xasprintf ("%d", 12345);
       ASSERT (result != NULL);
       ASSERT (strcmp (result, "12345") == 0);
       free (result);
     }
+
+  result = xasprintf ("");
+  ASSERT (result != NULL);
+  ASSERT (strcmp (result, "") == 0);
+
+  result = xasprintf ("%s", "foo");
+  ASSERT (result != NULL);
+  ASSERT (strcmp (result, "foo") == 0);
+
+  result = xasprintf ("%s%s", "foo", "bar");
+  ASSERT (result != NULL);
+  ASSERT (strcmp (result, "foobar") == 0);
+
+  result = my_xasprintf ("%s%sbaz", "foo", "bar");
+  ASSERT (result != NULL);
+  ASSERT (strcmp (result, "foobarbaz") == 0);
 }
 
 int
-- 
1.6.5.2