fix: retain the newest dictionary request

tests/engine_test.c

@@ -108,6 +108,53 @@ engine_selects_visible_candidate(struct ct *t)
 	}
 }
 
+void
+engine_candidate_shortcut_modifiers(struct ct *t)
+{
+	static u32int mods[] = { Mctrl, Malt, Msuper };
+	Str com;
+	int i;
+
+	for(i = 0; i < nelem(mods); i++){
+		init();
+		im.kouho[0] = mkstr("must-not-select");
+		im.nkouho = 1;
+		im.sel = -1;
+		sclear(&com);
+		CT_CHECK(t, !keystroke('1', mods[i], &com));
+		CT_CHECK(t, scmp(&com, &im.kouho[0]) != 0);
+	}
+}
+
+void
+engine_dictionary_queue_latest_wins(struct ct *t)
+{
+	Channel *saved;
+	Dictreq old, got;
+	Str key;
+
+	saved = dictreqc;
+	dictreqc = chancreate(sizeof(Dictreq), 1);
+	memset(&old, 0, sizeof old);
+	old.key = mkstr("old-key");
+	old.pre = mkstr("old-preedit");
+	old.lang = LangJP;
+	CT_CHECK(t, channbsend(dictreqc, &old) > 0);
+	init();
+	im.l = getlang(LangJP);
+	im.pre = mkstr("new-preedit");
+	key = mkstr("new-key");
+	dictsend(&im, &key);
+	if(CT_CHECK(t, channbrecv(dictreqc, &got) > 0)){
+		checkstr(t, "newest dictionary key", "new-key", &got.key);
+		checkstr(t, "newest dictionary preedit", "new-preedit", &got.pre);
+		CT_EQ_INT(t, LangJP, got.lang);
+	}
+	CT_CHECK(t, channbrecv(dictreqc, &got) <= 0);
+	chanfree(dictreqc);
+	dictreqc = saved;
+}
+
 void
 engine_commit_contract(struct ct *t)
 {