Tests: add script for running multiple Python-module tests

- This is a driver script for running testmodule.py multiple times
   with different global- and job-configurations.
 - Usage: testpythonrun.sh <modulename>
 - Run the script from the build-directory. It uses files from the
   tests/ (source) subdirectory to drive the test runs.

src/modules/testpythonrun.sh

@@ -0,0 +1,55 @@
+#! /bin/sh
+
+### Command-line validation
+#
+#
+SRCDIR=$( dirname "$0" )
+test -d "$SRCDIR" || { echo "! Can't find source directory." ; exit 1 ; }
+
+MODULE="$1"
+test -n "$MODULE" || { echo "! Usage: $0 <module>" ; exit 1 ; }
+
+### Run-time validation
+#
+# .. switch SRCDIR to the module that has been found
+BINDIR="$SRCDIR"  # Keep original SRCDIR
+SRCDIR="$SRCDIR/$MODULE"
+XSRCDIR="src/modules/$MODULE"  # In builddir
+TESTDIR="$SRCDIR/tests"
+
+test -x "$BINDIR/testmodule.py" || { echo "! No support script $BINDIR/testmodule.py" ; exit 1 ; }
+test -d "$SRCDIR" || { echo "! Source $SRCDIR is not a directory." ; exit 1 ; }
+test -f "$TESTDIR/1.global" || { echo "! Source $SRCDIR has no tests." ; exit 1 ; }
+
+test -f "libcalamares.so" || { echo "! Run the tests from the build-directory." ; exit 1 ; }
+test -d "$XSRCDIR" || { echo "! No module directory $XSRCDIR in build-dir." ; exit 1 ; }
+
+### Python setup
+#
+#
+export PYTHONPATH=".:$PYTHONPATH"
+PYTHON=$( which python3 2> /dev/null )
+if test -z "$PYTHON" ; then
+	PYTHON=$( which python 2> /dev/null )
+fi
+test -x "$PYTHON" || { echo "! No suitable Python executable found." ; exit 1 ; }
+
+### Test-execution
+#
+#
+C=0
+while true ; do
+	# Might use shell arithmetic, but need other shebang then
+	C=$( expr "$C" + 1 )
+
+	G_CFG="$TESTDIR/$C.global"
+	J_CFG="$TESTDIR/$C.job"
+
+	test -f "$G_CFG" || break
+	if test -f "$J_CFG" ; then
+		$PYTHON "$BINDIR/testmodule.py" "$XSRCDIR" "$G_CFG" "$J_CFG"
+	else
+		$PYTHON "$BINDIR/testmodule.py" "$XSRCDIR" "$G_CFG"
+	fi
+done
+