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/prereq

@@ -0,0 +1,77 @@
+#!/bin/sh
+. ./Common
+
+###############################################################################
+
+qpkg "new prereq for new package" prereq foo <<EOF
+Package: bar
+Version: 1
+Architecture: test
+Filename: bar_1_test.ipkg
+
+Package: foo
+Version: 0
+Architecture: test
+Depends: bar
+Filename: foo_0_test.ipkg
+EOF
+expect <<EOF
+bar_1_test.ipkg
+EOF
+
+###############################################################################
+
+qpkg "installed prereq for new package (install record first)" prereq foo <<EOF
+Package: bar
+Version: 1
+Architecture: test
+Filename: bar_1_test.ipkg
+
+Package: bar
+Version: 1
+Architecture: test
+Status: installed
+
+Package: foo
+Version: 0
+Architecture: test
+Depends: bar
+Filename: foo_0_test.ipkg
+EOF
+expect <<EOF
+EOF
+
+###############################################################################
+
+qpkg "installed prereq for new package (package record first)" prereq foo <<EOF
+Package: foo
+Version: 0
+Architecture: test
+Depends: bar
+Filename: foo_0_test.ipkg
+
+Package: bar
+Version: 1
+Architecture: test
+Status: installed
+
+Package: bar
+Version: 1
+Architecture: test
+Filename: bar_1_test.ipkg
+EOF
+expect <<EOF
+EOF
+
+###############################################################################
+
+qpkg_fail "unknown prereq for new package" prereq foo <<EOF
+Package: foo
+Version: 0
+Architecture: test
+Depends: bar
+Filename: foo_0_test.ipkg
+EOF
+expect <<EOF
+can't resolve foo
+EOF