Check for specific error messages in the testsuite. This

permits testing that the compiler emits error messages for
specific lines that match egrep regexps.  The desired error
messages are expressed using comments of the form
	// ERROR "regexp"

R=r
DELTA=90  (73 added, 8 deleted, 9 changed)
OCL=15513
CL=15566

1 files changed, 74 insertions, 0 deletions

diff --git a/test/errchk b/test/errchk
new file mode 100755
index 000000000..19fa1a5cc
--- /dev/null
+++ b/test/errchk
@@ -0,0 +1,74 @@
+#!/bin/bash
+# Copyright 2009 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+# This script checks that the compilers emits the errors which we
+# expect.  Usage: errchk COMPILER [OPTS] SOURCEFILE.  This will run
+# the command COMPILER [OPTS] SOURCEFILE.  The compilation is expected
+# to fail; if it succeeds, this script will report an error.  The
+# stderr output of the compiler will be matched against comments in
+# SOURCEFILE.  For each line of the source file which should generate
+# an error, there should be a comment of the form // ERROR "regexp".
+# If the compiler generates an error for a line which has no such
+# commnt, this script will report an error.  Likewise if the compiler
+# does not generate an error for a line which has a comment, or if the
+# error message does not match the <regexp>.  The <regexp> is
+# interpreted by egrep.
+
+if test $# -lt 2; then
+  echo 1>&2 "Usage: errchk COMPILER [OPTS] SOURCEFILE"
+  exit 1
+fi
+
+ARGCOUNT=$#
+SOURCEFILE=${!ARGCOUNT}
+
+TMPOUT=/tmp/errchk-out-$$
+TMPERR=/tmp/errchk-err-$$
+TMPALL=/tmp/errchk-all-$$
+TMPTMP=/tmp/errchk-tmp-$$
+TMPSTAT=/tmp/errchk-stat-$$
+rm -f $TMPOUT $TMPERR $TMPALL $TMPTMP $TMPSTAT
+
+trap "rm -f $TMPOUT $TMPERR $TMPALL $TMPTMP $TMPSTAT" 0 1 2 3 14 15
+
+if $* >$TMPOUT 2>$TMPERR; then
+  echo 1>&2 "errchk: command succeeded unexpectedly: " "$@"
+  cat $TMPOUT
+  cat 1>&2 $TMPERR
+  rm -f $TMPOUT $TMPERR
+  exit 1
+fi
+
+cat $TMPOUT $TMPERR > $TMPALL
+
+header=0
+echo 0 > $TMPSTAT
+pr -n -t $SOURCEFILE | grep '// ERROR' | while read line; do
+  lineno=`echo $line | sed -e 's/^[ ]*\([0-9]*\).*$/\1/'`
+  regexp=`echo $line | sed -e 's|.*// ERROR "\([^"]*\)".*$|\1|'`
+  errmsg=`grep "$SOURCEFILE:$lineno" <$TMPALL`
+  grep -v "$SOURCEFILE:$lineno" < $TMPALL > $TMPTMP
+  mv -f $TMPTMP $TMPALL
+  if test -z "$errmsg"; then
+    echo 1>&2 "errchk: $SOURCEFILE: missing expected error message on line $lineno: '$regexp'"
+    echo 1 > $TMPSTAT
+  elif ! echo "$errmsg" | egrep -q "$regexp"; then
+    echo 1>&2 "errchk: $SOURCEFILE: error message on line $lineno does not match '$regexp'"
+    echo 1>&2 $errmsg
+    echo 1 > $TMPSTAT
+  fi
+done
+
+if test -s $TMPALL; then
+  echo 1>&2 "errchk: $SOURCEFILE: unmatched error messages:"
+  echo 1>&2 "=================================================="
+  cat 1>&2 $TMPALL
+  echo 1>&2 "=================================================="
+  echo 1 > $TMPSTAT
+fi
+
+status=`cat $TMPSTAT`
+
+exit $status