*printf-posix-tests: Strengthen tests

[Bruno Haible]

Since 2023-03-22, Gnulib implements the %b directive in the *printf-posix
modules. This patch updates some unit tests to also test the %b directive.


2024-06-30  Bruno Haible  <bruno@clisp.org>

        *printf-posix-tests: Strengthen tests.
        * tests/test-fprintf-posix.h (test_function): Test %b directive.
        * tests/test-printf-posix.h (test_function): Likewise.
        * tests/test-dprintf-posix.c (test_function): Likewise.
        * tests/test-printf-posix.output: Update expected test result.

diff --git a/tests/test-dprintf-posix.c b/tests/test-dprintf-posix.c
index 83c1587daf..4d952baa99 100644
--- a/tests/test-dprintf-posix.c
+++ b/tests/test-dprintf-posix.c
@@ -159,6 +159,12 @@ test_function (int (*my_dprintf) (int, const char *, ...))
   /* Precision with rounding.  */
   my_dprintf (fileno (stdout), "%.2LF %d\n", 999.996L, 33, 44, 55);
 
+  /* Test the support of the %b format directive.  */
+
+  /* This test would fail on glibc 2.34, musl libc, macOS 14,
+     FreeBSD 13.2, NetBSD 10.0, OpenBSD 7.5, AIX 7.3, Solaris 11.4.  */
+  my_dprintf (fileno (stdout), "%b %d\n", 12345, 33, 44, 55);
+
   /* Test the support of the POSIX/XSI format strings with positions.  */
 
   my_dprintf (fileno (stdout), "%2$d %1$d\n", 33, 55);
diff --git a/tests/test-fprintf-posix.h b/tests/test-fprintf-posix.h
index d36305b145..b5d023ff5b 100644
--- a/tests/test-fprintf-posix.h
+++ b/tests/test-fprintf-posix.h
@@ -147,6 +147,12 @@ test_function (int (*my_fprintf) (FILE *, const char *, 
...))
   /* Precision with rounding.  */
   my_fprintf (stdout, "%.2LF %d\n", 999.996L, 33, 44, 55);
 
+  /* Test the support of the %b format directive.  */
+
+  /* This test would fail on glibc 2.34, musl libc, macOS 14,
+     FreeBSD 13.2, NetBSD 10.0, OpenBSD 7.5, AIX 7.3, Solaris 11.4.  */
+  my_fprintf (stdout, "%b %d\n", 12345, 33, 44, 55);
+
   /* Test the support of the POSIX/XSI format strings with positions.  */
 
   my_fprintf (stdout, "%2$d %1$d\n", 33, 55);
diff --git a/tests/test-printf-posix.h b/tests/test-printf-posix.h
index f1cb735c9c..acb4e82b26 100644
--- a/tests/test-printf-posix.h
+++ b/tests/test-printf-posix.h
@@ -149,6 +149,12 @@ test_function (int (*my_printf) (const char *, ...))
   /* Precision with rounding.  */
   my_printf ("%.2LF %d\n", 999.996L, 33, 44, 55);
 
+  /* Test the support of the %b format directive.  */
+
+  /* This test would fail on glibc 2.34, musl libc, macOS 14,
+     FreeBSD 13.2, NetBSD 10.0, OpenBSD 7.5, AIX 7.3, Solaris 11.4.  */
+  my_printf ("%b %d\n", 12345, 33, 44, 55);
+
   /* Test the support of the POSIX/XSI format strings with positions.  */
 
   my_printf ("%2$d %1$d\n", 33, 55);
diff --git a/tests/test-printf-posix.output b/tests/test-printf-posix.output
index 618825bb7b..f60eda473a 100644
--- a/tests/test-printf-posix.output
+++ b/tests/test-printf-posix.output
@@ -37,4 +37,5 @@ inf 33
 1234 33
 999.95 33
 1000.00 33
+11000000111001 33
 55 33