test: review emitter tests

test/entt/signal/emitter.cpp

@@ -2,13 +2,10 @@
 #include <memory>
 #include <utility>
 #include <gtest/gtest.h>
+#include <common/emitter.h>
 #include <common/linter.hpp>
 #include <entt/signal/emitter.hpp>
 
-struct test_emitter: entt::emitter<test_emitter> {
-    using entt::emitter<test_emitter>::emitter;
-};
-
 struct foo_event {
     int i;
 };
@@ -17,13 +14,13 @@ struct bar_event {};
 struct quux_event {};
 
 TEST(Emitter, Move) {
-    test_emitter emitter{};
+    test::emitter emitter{};
     emitter.on<foo_event>([](auto &, const auto &) {});
 
     ASSERT_FALSE(emitter.empty());
     ASSERT_TRUE(emitter.contains<foo_event>());
 
-    test_emitter other{std::move(emitter)};
+    test::emitter other{std::move(emitter)};
 
     test::is_initialized(emitter);
 
@@ -40,8 +37,8 @@ TEST(Emitter, Move) {
 }
 
 TEST(Emitter, Swap) {
-    test_emitter emitter{};
-    test_emitter other{};
+    test::emitter emitter{};
+    test::emitter other{};
     int value{};
 
     emitter.on<foo_event>([&value](auto &event, const auto &) {
@@ -64,7 +61,7 @@ TEST(Emitter, Swap) {
 }
 
 TEST(Emitter, Clear) {
-    test_emitter emitter{};
+    test::emitter emitter{};
 
     ASSERT_TRUE(emitter.empty());
 
@@ -106,7 +103,7 @@ TEST(Emitter, Clear) {
 }
 
 TEST(Emitter, ClearFromCallback) {
-    test_emitter emitter{};
+    test::emitter emitter{};
 
     ASSERT_TRUE(emitter.empty());
 
@@ -129,7 +126,7 @@ TEST(Emitter, ClearFromCallback) {
 }
 
 TEST(Emitter, On) {
-    test_emitter emitter{};
+    test::emitter emitter{};
     int value{};
 
     emitter.on<foo_event>([&value](auto &event, const auto &) {
@@ -146,8 +143,8 @@ TEST(Emitter, On) {
 }
 
 TEST(Emitter, OnAndErase) {
-    test_emitter emitter{};
-    const std::function<void(bar_event &, test_emitter &)> func{};
+    test::emitter emitter{};
+    const std::function<void(bar_event &, test::emitter &)> func{};
 
     emitter.on(func);
 
@@ -162,7 +159,7 @@ TEST(Emitter, OnAndErase) {
 
 TEST(Emitter, CustomAllocator) {
     const std::allocator<void> allocator{};
-    test_emitter emitter{allocator};
+    test::emitter emitter{allocator};
 
     ASSERT_EQ(emitter.get_allocator(), allocator);
     ASSERT_FALSE(emitter.get_allocator() != allocator);