With a little help from m8cutils and abyss, we now have regression tests for

the topological sort. "make test" or "make tests" invokes the regression tests,
"make valgrind" runs them under valgrind's watchful eyes.

- fped.c (usage, main): added option -T to force batch mode (for regression
  testing)
- Makefile, test/Common: added regression test infrastructure
- test/tsort: test cases for the topological sort
- README: added pointer to test/tsort



git-svn-id: http://svn.openmoko.org/trunk/eda/fped@5943 99fdad57-331a-0410-800a-d7fa5415bdb3

test/tsort

@@ -0,0 +1,155 @@
+#!/bin/sh
+. ./Common
+
+###############################################################################
+
+fped "tsort: total order" <<EOF
+package "_"
+
+%tsort {
+	a b
+	a c
+	a d
+	b c
+	b d
+	c d
+}
+EOF
+expect <<EOF
+a
+b
+c
+d
+EOF
+
+#------------------------------------------------------------------------------
+
+fped "tsort: partial order change (1)" <<EOF
+package "_"
+
+%tsort {
+	a b
+	a c
+	a d
+	d b
+}
+EOF
+expect <<EOF
+a
+c
+d
+b
+EOF
+
+#------------------------------------------------------------------------------
+
+fped "tsort: partial order change (2)" <<EOF
+package "_"
+
+%tsort {
+	b c
+	c d
+	a b
+}
+EOF
+expect <<EOF
+a
+b
+c
+d
+EOF
+
+#------------------------------------------------------------------------------
+
+fped "tsort: old order differs from resolution order" <<EOF
+package "_"
+
+%tsort {
+	+a +b +c +d
+	a c
+	a b
+	a d
+}
+EOF
+expect <<EOF
+a
+b
+c
+d
+EOF
+
+#------------------------------------------------------------------------------
+
+fped "tsort: order change due to priority" <<EOF
+package "_"
+
+%tsort {
+	a b
+	a c 1
+	a d
+}
+EOF
+expect <<EOF
+a
+c
+b
+d
+EOF
+
+#------------------------------------------------------------------------------
+
+fped "tsort: priority accumulation without decay" <<EOF
+package "_"
+
+%tsort {
+	+a +b +c +d
+	a b 1
+	a d 1
+}
+EOF
+expect <<EOF
+a
+b
+d
+c
+EOF
+
+#------------------------------------------------------------------------------
+
+fped "tsort: priority accumulation with decay" <<EOF
+package "_"
+
+%tsort {
+	+a -b +c +d
+	a b 1
+	a d 1
+}
+EOF
+expect <<EOF
+a
+b
+c
+d
+EOF
+
+#------------------------------------------------------------------------------
+
+fped_fail "tsort: cycle" <<EOF
+package "_"
+
+%tsort {
+	a b
+	b a
+}
+EOF
+expect <<EOF
+cycle detected in partial order
+Aborted (core dumped)
+EOF
+
+# not entirely comfortable about the "Aborted (core dumped)". It's a system
+# message (from the shell) that may get mangled. Also, since few people keep
+# their cores these days, "(core dumped)" shouldn't really appear. Wonder why
+# it does. strace agrees that __WCOREFLAG is set ...
+
+###############################################################################