tests: use perl for printing special sequences to files.

And skip tests if perl is not available.  This is better than
playing tricks with shell portability.  Suggested by Akim
Demaille.
* tests/input.at (Bad escapes in literals): Use it here for special
characters.
(cherry picked from commit b70c7fb4e1db54e78d4f3d4a0f110a81118ffc60)

Conflicts:

	tests/input.at

diff --git a/ChangeLog b/ChangeLog
index 611091b428e325b05f96acecddd68248a899dd50..1e9ce511543406521f37cdef615da0e380059841 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2009-08-27  Joel E. Denny  <jdenny@clemson.edu>
+
+       tests: use perl for printing special sequences to files.
+       And skip tests if perl is not available.  This is better than
+       playing tricks with shell portability.  Suggested by Akim
+       Demaille.
+       * tests/input.at (Bad character literals): Use it here for
+       omitting final newlines.
+       (Bad escapes in literals): Use it here for special characters.
+
 2009-08-21  Joel E. Denny  <jdenny@clemson.edu>
 
        Use locale when quoting.

diff --git a/tests/input.at b/tests/input.at
index 1a63d7e88f82836aab0c935528d580c4aebee875..be84f9cf37a47db0d6fee706cf414346a10d02c4 100644 (file)
--- a/tests/input.at
+++ b/tests/input.at
@@ -953,7 +953,13 @@ start: '\777' '\0' '\xfff' '\x0'
        '\uffff' '\u0000' '\Uffffffff' '\U00000000'
        '\ ' '\A';
 ]])
-echo 'start: "\T\F\0\1" ;' | tr 'TF01' '\011\014\0\1' >> input.y
+
+# It is not easy to create special characters, we cannot even trust tr.
+# Beside we cannot even expect "echo '\0'" to output two characters
+# (well three with \n): at least Bash 3.2 converts the two-character
+# sequence "\0" into a single NUL character.
+AT_CHECK([[perl -e 'print "start: \"\\\t\\\f\\\0\\\1\" ;";' >> input.y \
+           || exit 77]])
 
 AT_BISON_CHECK([input.y], [1], [],
 [[input.y:2.9-12: invalid number after \-escape: 777