tests: run tests for each arch

Since we can sign i386 PE/COFF images, run the tests on both x86-64 and
i386 binaries.

We do this by moving test.pecoff to test-<arch>.pecoff, and using
automake's parallel-test option to add a wrapper to each test execution.
This wrapper calls each test once per arch (as defined in TEST_ARCHES),
and checks for failures in any invocation.

Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>

tests/test-wrapper.sh

@@ -0,0 +1,52 @@
+#!/bin/bash
+
+# set a few global variables that may be used by the test
+basedir=$(cd $srcdir && pwd)
+datadir=$(pwd)
+bindir="$datadir/.."
+
+sbsign=$bindir/sbsign
+sbverify=$bindir/sbverify
+sbattach=$bindir/sbattach
+
+key="$datadir/private-key.rsa"
+cert="$datadir/public-cert.pem"
+
+export basedir datadir bindir sbsign sbverify sbattach key cert
+
+# 'test' needs to be an absolute path, as we will cd to a temporary
+# directory before running the test
+test="$PWD/$1"
+rc=0
+
+function run_test()
+{
+	test="$1"
+
+	# image depends on the test arch
+	image="$datadir/test-$arch.pecoff"
+	export image
+
+	# create the temporary directory...
+	tempdir=$(mktemp --directory)
+
+	# ... and run the test in it.
+	( cd "$tempdir";  $test )
+
+	if [ $? -ne 0 ]
+	then
+		echo "test $(basename $test) failed on arch $arch"
+		echo
+		rc=1
+	fi
+
+	rm -rf "$tempdir"
+}
+
+# run test on all available arches
+for arch in $TEST_ARCHES
+do
+	run_test $test
+done
+
+exit $rc