tests: code coverage

test/entt/signal/emitter.cpp

@@ -12,24 +12,27 @@ TEST(Emitter, Clear) {
     test_emitter emitter;
 
     ASSERT_TRUE(emitter.empty());
-    ASSERT_TRUE(emitter.empty<quux_event>());
 
     emitter.on<foo_event>([](const auto &, const auto &){});
+    emitter.once<quux_event>([](const auto &, const auto &){});
 
     ASSERT_FALSE(emitter.empty());
     ASSERT_FALSE(emitter.empty<foo_event>());
+    ASSERT_FALSE(emitter.empty<quux_event>());
     ASSERT_TRUE(emitter.empty<bar_event>());
 
     emitter.clear<bar_event>();
 
     ASSERT_FALSE(emitter.empty());
     ASSERT_FALSE(emitter.empty<foo_event>());
+    ASSERT_FALSE(emitter.empty<quux_event>());
     ASSERT_TRUE(emitter.empty<bar_event>());
 
     emitter.clear<foo_event>();
 
-    ASSERT_TRUE(emitter.empty());
+    ASSERT_FALSE(emitter.empty());
     ASSERT_TRUE(emitter.empty<foo_event>());
+    ASSERT_FALSE(emitter.empty<quux_event>());
     ASSERT_TRUE(emitter.empty<bar_event>());
 
     emitter.on<foo_event>([](const auto &, const auto &){});
@@ -37,6 +40,7 @@ TEST(Emitter, Clear) {
 
     ASSERT_FALSE(emitter.empty());
     ASSERT_FALSE(emitter.empty<foo_event>());
+    ASSERT_FALSE(emitter.empty<quux_event>());
     ASSERT_FALSE(emitter.empty<bar_event>());
 
     emitter.clear();
@@ -48,19 +52,25 @@ TEST(Emitter, Clear) {
 
 TEST(Emitter, ClearPublishing) {
     test_emitter emitter;
-    bool invoked = false;
 
     ASSERT_TRUE(emitter.empty());
 
-    emitter.on<bar_event>([&invoked](const auto &, auto &em){
-        invoked = true;
-        em.clear();
+    emitter.once<foo_event>([](const auto &, auto &em){
+        em.template once<foo_event>([](const auto &, auto &){});
+        em.template clear<foo_event>();
+    });
+
+    emitter.on<bar_event>([](const auto &, auto &em){
+        em.template once<bar_event>([](const auto &, auto &){});
+        em.template clear<bar_event>();
     });
 
+    ASSERT_FALSE(emitter.empty());
+
+    emitter.publish<foo_event>();
     emitter.publish<bar_event>();
 
     ASSERT_TRUE(emitter.empty());
-    ASSERT_TRUE(invoked);
 }
 
 TEST(Emitter, On) {