Add more tests to desktopui_IBusTest

client/deps/ibusclient/src/ibusclient.cc

Index: client/deps/ibusclient/src/ibusclient.cc
diff --git a/client/deps/ibusclient/src/ibusclient.cc b/client/deps/ibusclient/src/ibusclient.cc
index 4f053a1c969970ddc78207a4430df1eb62f0a2e0..aee7f0a25f4274afd9642f3ed1aa9d926e3ae588 100644
--- a/client/deps/ibusclient/src/ibusclient.cc
+++ b/client/deps/ibusclient/src/ibusclient.cc
@@ -3,14 +3,51 @@
 // found in the LICENSE file.
 
 #include <assert.h>
+#include <glib.h>
 #include <ibus.h>
+#include <stdio.h>
+#include <string>
+
+// Prints the names of the given engines. Takes the ownership of |engines|.
+void PrintEngineNames(GList* engines) {
+  for (GList* cursor = engines; cursor; cursor = g_list_next(cursor)) {
+    IBusEngineDesc* engine_desc = IBUS_ENGINE_DESC(cursor->data);
+    assert(engine_desc);
+    printf("%s\n", engine_desc->name);
+    g_object_unref(IBUS_ENGINE_DESC(cursor->data));
+  }
+  g_list_free(engines);
+}
 
 int main(int argc, char **argv) {
+  if (argc == 1) {
+    printf("Usage: %s COMMAND\n", argv[0]);
+    printf("check_reachable      Check if ibus-daemon is reachable\n");
+    printf("list_engines         List engine names (all engines)\n");
+    printf("list_active_engines  List active engine names\n");
+    return 1;
+  }
+
   ibus_init();
+  bool connected = false;
   IBusBus* ibus = ibus_bus_new();
+  if (ibus) {
+    connected = ibus_bus_is_connected(ibus);
+  }
+
+  const std::string command = argv[1];
+  if (command == "check_reachable") {
+    printf("%s\n", connected ? "YES" : "NO");
+  }
+
+  // Other commands need the bus to be connected.
   assert(ibus);
-  // This fails if ibus daemon is not running.
-  assert(ibus_bus_is_connected(ibus));
-  // TODO(satorux): Add more tests.
+  assert(connected);
+  if (command == "list_engines") {
+    PrintEngineNames(ibus_bus_list_engines(ibus));
+  } else if (command == "list_active_engines") {
+    PrintEngineNames(ibus_bus_list_active_engines(ibus));
+  }
+
   return 0;
 }