src/tests: Fix make check in Fedora 29

ibus-bus and ibus-compose failed in Fedora 29.

1. In ibus-bus with runtest, ibus-daemon failed to restart in
start_exit_async() because it seems to have conflicting IO with runtest
and ibus-daemon failed to close a file descriptor in _restart_server().
The solution is to add a sleep in start_exit_async().
Also added ibus_get_address() in test_async_apis_finish() to check
if ibus-daemon finished to restart.

2. In ibus-compose, the GTK application could not get the ibus module.
The solution is to export GTK_IM_MODULE=ibus.

3. Added DISABLE_DAEMONIZE_IN_TESTS to get error messages in ibus-daemon.
% make DISABLE_DAEMONIZE_IN_TESTS=1 check

4 files changed, 33 insertions, 8 deletions

diff --git a/bus/Makefile.am b/bus/Makefile.am
index bdae5c92..4383a874 100644
--- a/bus/Makefile.am
+++ b/bus/Makefile.am
@@ -124,6 +124,7 @@ TESTS_ENVIRONMENT = \
     srcdir=$(srcdir) \
     LD_LIBRARY_PATH="$(top_builddir)/src/.libs:$(top_builddir)/src" \
     DISABLE_GUI_TESTS="$(DISABLE_GUI_TESTS)" \
+    DISABLE_DAEMONIZE_IN_TESTS="$(DISABLE_DAEMONIZE_IN_TESTS)" \
     $(NULL)
 
 LOG_COMPILER = $(top_srcdir)/src/tests/runtest
diff --git a/src/tests/Makefile.am b/src/tests/Makefile.am
index c5fef3c8..e337a59b 100644
--- a/src/tests/Makefile.am
+++ b/src/tests/Makefile.am
@@ -73,6 +73,7 @@ TESTS_ENVIRONMENT = \
     srcdir=$(srcdir) \
     LD_LIBRARY_PATH="$(top_builddir)/src/.libs:$(top_builddir)/src" \
     DISABLE_GUI_TESTS="$(DISABLE_GUI_TESTS)" \
+    DISABLE_DAEMONIZE_IN_TESTS="$(DISABLE_DAEMONIZE_IN_TESTS)" \
     $(NULL)
 
 LOG_COMPILER = $(srcdir)/runtest
diff --git a/src/tests/ibus-bus.c b/src/tests/ibus-bus.c
index 7fa1bc4a..0bf9e612 100644
--- a/src/tests/ibus-bus.c
+++ b/src/tests/ibus-bus.c
@@ -820,6 +820,14 @@ finish_exit_async (GObject *source_object,
 static void
 start_exit_async (void)
 {
+    /* When `./runtest ibus-bus` runs, ibus-daemon sometimes failed to
+     * restart because closing a file descriptor was failed in
+     * bus/server.c:_restart_server() with a following error:
+     *     "inotify read(): Bad file descriptor"
+     * Now g_usleep() is added here to write down the buffer and not to
+     * fail to restart ibus-daemon.
+     */
+    g_usleep (G_USEC_PER_SEC);
     ibus_bus_exit_async (bus,
                          TRUE, /* restart */
                          -1, /* timeout */
@@ -831,6 +839,9 @@ start_exit_async (void)
 static gboolean
 test_async_apis_finish (gpointer user_data)
 {
+    /* INFO: g_warning() causes SEGV with runtest script */
+    if (ibus_get_address () == NULL)
+        g_warning ("ibus-daemon does not restart yet from start_exit_async().");
     ibus_quit ();
     return FALSE;
 }
@@ -906,7 +917,9 @@ call_next_async_function (void)
     };
     static guint index = 0;
 
-    // Use g_timeout_add to make sure test_async_apis finishes even if async_functions is empty.
+    /* Use g_timeout_add to make sure test_async_apis finishes even if
+     * async_functions is empty.
+     */
     if (index >= G_N_ELEMENTS (async_functions))
         g_timeout_add (1, test_async_apis_finish, NULL);
     else
diff --git a/src/tests/runtest b/src/tests/runtest
index d7f96ea3..ab39e9f2 100755
--- a/src/tests/runtest
+++ b/src/tests/runtest
@@ -22,6 +22,7 @@
 : ${builddir:=.}
 : ${srcdir:=.}
 : ${DISABLE_GUI_TESTS:=''}
+: ${DISABLE_DAEMONIZE_IN_TESTS:=''}
 
 BUS_REQUIRED_TESTS="
 ibus-bus
@@ -162,16 +163,25 @@ run_test_case()
         export GSETTINGS_SCHEMA_DIR=$PWD
 
         # Start ibus-daemon.
-        ../$top_builddir/bus/ibus-daemon \
-        --daemonize \
-        --cache=none \
-        --panel=disable \
-        --emoji-extension=disable \
-        --config=default \
-        --verbose;
+        DAEMON_ARGS='
+            --cache=none
+            --panel=disable
+            --emoji-extension=disable
+            --config=default
+            --verbose
+        '
+        if test x"$DISABLE_DAEMONIZE_IN_TESTS" = x ; then
+            ../$top_builddir/bus/ibus-daemon \
+                $DAEMON_ARGS --daemonize;
+        else
+            ../$top_builddir/bus/ibus-daemon \
+                $DAEMON_ARGS &
+        fi
 
         # Wait until all necessary components are up.
         sleep 1
+
+        export GTK_IM_MODULE=ibus
     fi
 
     "../$tst" ${1+"$@"}