tests: factor out a new require_pcre_ function

* tests/init.cfg (require_pcre_): New function, factored out of...
* tests/pcre-z: ...here.  Use the function.
* tests/pcre: Likewise.

3 files changed, 8 insertions, 6 deletions

diff --git a/tests/init.cfg b/tests/init.cfg
index baa2b40f..4c9d2d33 100644
--- a/tests/init.cfg
+++ b/tests/init.cfg
@@ -43,6 +43,12 @@ require_timeout_()
     || skip_ your system lacks the timeout program
 }
 
+require_pcre_()
+{
+  echo . | grep -P . 2>err || skip_ no PCRE support
+  compare err /dev/null || fail_ PCRE available, but stderr not empty.
+}
+
 # Some tests would fail without this particular locale.
 # If the locale is not available, just skip the test.
 require_en_utf8_locale_()
diff --git a/tests/pcre b/tests/pcre
index bec6e372..a712d19a 100644
--- a/tests/pcre
+++ b/tests/pcre
@@ -8,9 +8,7 @@
 # notice and this notice are preserved.
 
 . "${srcdir=.}/init.sh"; path_prepend_ ../src
-
-# Test that grep was compiled with HAVE_LIBPCRE.  Otherwise, pass.
-echo . | grep -P . || skip_ no PCRE support
+require_pcre_
 
 fail=0
 
diff --git a/tests/pcre-z b/tests/pcre-z
index d1d5dd7d..94e9a78e 100755
--- a/tests/pcre-z
+++ b/tests/pcre-z
@@ -1,9 +1,7 @@
 #!/bin/sh
 # Test Perl regex with NUL-separated input
 . "${srcdir=.}/init.sh"; path_prepend_ ../src
-
-echo a | grep -P a >/dev/null 2>err || skip_ 'PCRE not available.'
-compare err /dev/null || fail_ 'PCRE available, but stderr not empty.'
+require_pcre_
 
 REGEX=a