qpkg: added regression test harness and a few tests

- Makefile (test, tests, valgrind): new targets to run regression tests
- test/Common: test harness (adapted from fped)
- test/minpkg: test minimum package definition
- test/prereq: test basic prerequisite queries

qpkg/test/Common

@@ -0,0 +1,79 @@
+#!/bin/sh
+#
+# Common - Elements shared by all regression tests for qpkg
+#
+# Written 2010 by Werner Almesberger
+# Copyright 2010 Werner Almesberger
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+
+
+qpkg()
+{
+    echo -n "$1: " 1>&2
+    shift
+    cat >_in
+    $VALGRIND ${QPKG:-../qpkg} _in "$@" >_out 2>&1 || {
+	echo FAILED "($SCRIPT)" 1>&2
+	cat _out
+	rm -f _in _out
+	exit 1
+    }
+    rm -f _in
+}
+
+
+qpkg_fail()
+{
+    echo -n "$1: " 1>&2
+    shift
+    cat >_in
+    $VALGRIND ${QPKG:-../qpkg} _in "$@" >_out 2>&1 && {
+	echo FAILED "($SCRIPT)" 1>&2
+	cat _out
+	rm -f _in _out
+	exit 1
+    }
+    rm -f _in
+}
+
+
+expect()
+{
+    diff -u - "$@" _out >_diff || {
+	echo FAILED "($SCRIPT)" 1>&2
+	cat _diff 1>&2
+	rm -f _out _diff
+	exit 1
+    }
+    echo PASSED 1>&2
+    rm -f _out _diff
+    passed=`expr ${passed:-0} + 1`
+}
+
+
+expect_grep()
+{
+	grep "$1" <_out >_tmp || exit 1
+	mv _tmp _out
+	shift
+	expect "$@"
+}
+
+
+expect_sed()
+{
+	sed "$1" <_out >_tmp || exit 1
+	mv _tmp _out
+	shift
+	expect "$@"
+}
+
+
+if [ ! -z "$CWD_PREFIX" -a ! -z "$QPKG" -a "$QPKG" = "${QPKG#/}" ]; then
+    QPKG="$CWD_PREFIX/$QPKG"
+fi