Tests: launch a temporary D-Bus session

tests/common.pri

@@ -12,6 +12,6 @@ INCLUDEPATH += $$PWD/../src/extensions
 target.path = /opt/tests/qtcontacts-sqlite-qt5
 INSTALLS += target
 
-check.commands = "LC_ALL=C QT_PLUGIN_PATH=$$shadowed($${PWD})/../src/engine/ ./$${TARGET}"
+check.commands = "$${PWD}/run_test.sh $$shadowed($${PWD})/.. ./$${TARGET}"
 check.depends = $${TARGET}
 QMAKE_EXTRA_TARGETS += check

tests/run_test.sh

@@ -0,0 +1,35 @@
+#! /bin/sh
+
+# Usage:
+#   run_test.sh <TOP_BUILD_DIR> <TEST_PROGRAM>
+#
+# Run TEST_PROGRAM within a proper environment; this includes a D-Bus session
+# and any environment variable needed for the succesful completion of the test.
+#
+# If the TEST_WRAPPER environment variable is set, then it will be executed and
+# the test program will be passed as an argument to it; this can be useful, for
+# example, to run the tests in valgrind or strace.
+
+set -e
+
+TOP_BUILD_DIR="$1"
+TEST_PROGRAM="$2"
+
+export LC_ALL=C
+export QT_PLUGIN_PATH="${TOP_BUILD_DIR}/src/engine/"
+
+OUTPUT=$(dbus-daemon --session --print-address '' --print-pid '' --fork)
+export DBUS_SESSION_BUS_ADDRESS=$(echo "$OUTPUT" | head -1)
+DBUS_DAEMON_PID=$(echo "$OUTPUT" | tail -1)
+
+cleanUp() {
+    echo "Killing the temporary D-Bus daemon"
+    kill "$DBUS_DAEMON_PID"
+}
+
+trap cleanUp EXIT INT TERM
+
+$TEST_WRAPPER $TEST_PROGRAM
+
+trap - EXIT
+cleanUp