Make GTK & async unit tests work by running them in a GTK+ main loop.

Include GResources in the build so they can be loaded.

Bug 776421.

* test/main.vala (main): Init GTK, start a main loop and run the tests in
  that.

* test/CMakeLists.txt: Include GResources in unit test binary so they can
  be loaded by tests, and since we can't compile them into the client
  static lib.

test/CMakeLists.txt

@@ -30,6 +30,7 @@ pkg_check_modules(DEPS REQUIRED
   javascriptcoregtk-4.0
   libsoup-2.4
   webkit2gtk-4.0
+  libxml-2.0
 )
 
 set(TEST_PACKAGES
@@ -59,6 +60,9 @@ set(LIB_PATHS ${DEPS_LIBRARY_DIRS})
 link_directories(${LIB_PATHS})
 add_definitions(${CFLAGS})
 
+# GResources must be compiled into the binary??
+set_property(SOURCE ${RESOURCES_C} PROPERTY GENERATED TRUE)
+
 set(VALAC_OPTIONS
     --vapidir=${CMAKE_BINARY_DIR}/src
     --vapidir=${CMAKE_SOURCE_DIR}/bindings/vapi
@@ -80,7 +84,7 @@ OPTIONS
     ${VALAC_OPTIONS}
 )
 
-add_executable(geary-test ${TEST_VALA_C})
+add_executable(geary-test ${TEST_VALA_C} ${RESOURCES_C})
 # Depend on geary so things like GResources, GSetting, etc are
 # compiled before the tests are built and run.
 add_dependencies(geary-test geary)

test/main.vala

@@ -24,6 +24,7 @@ int main(string[] args) {
      * Initialise all the things.
      */
 
+    Gtk.init(ref args);
     Test.init(ref args);
 
     Geary.RFC822.init();
@@ -52,5 +53,13 @@ int main(string[] args) {
     root.add_suite(engine);
     root.add_suite(client);
 
-    return Test.run();
+    int ret = -1;
+    Idle.add(() => {
+            ret = Test.run();
+            Gtk.main_quit();
+            return false;
+        });
+
+    Gtk.main();
+    return ret;
 }