locator: lib plugin test

test/CMakeLists.txt

@@ -149,6 +149,7 @@ if(ENTT_BUILD_LIB)
 
     SETUP_PLUGIN_TEST(dispatcher_plugin)
     SETUP_PLUGIN_TEST(emitter_plugin)
+    SETUP_PLUGIN_TEST(locator_plugin)
     SETUP_PLUGIN_TEST(meta_plugin)
     SETUP_PLUGIN_TEST(registry_plugin)
 

test/lib/locator_plugin/main.cpp

@@ -0,0 +1,32 @@
+#define CR_HOST
+
+#include <gtest/gtest.h>
+#include <cr.h>
+#include <entt/locator/locator.hpp>
+#include "types.h"
+
+TEST(Lib, Locator) {
+    entt::locator<service>::emplace().value = 42;
+
+    ASSERT_EQ(entt::locator<service>::value().value, 42);
+
+    userdata ud{};
+    ud.handle = entt::locator<service>::handle();
+    ud.value = 3;
+
+    cr_plugin ctx;
+    ctx.userdata = &ud;
+
+    cr_plugin_load(ctx, PLUGIN);
+    cr_plugin_update(ctx);
+
+    ASSERT_EQ(entt::locator<service>::value().value, ud.value);
+
+    // service updates do not propagate across boundaries
+    entt::locator<service>::emplace().value = 42;
+    cr_plugin_update(ctx);
+
+    ASSERT_NE(entt::locator<service>::value().value, ud.value);
+
+    cr_plugin_close(ctx);
+}

test/lib/locator_plugin/plugin.cpp

@@ -0,0 +1,19 @@
+#include <cr.h>
+#include <entt/locator/locator.hpp>
+#include "types.h"
+
+CR_EXPORT int cr_main(cr_plugin *ctx, cr_op operation) {
+    switch(operation) {
+    case CR_LOAD:
+        entt::locator<service>::reset(static_cast<userdata *>(ctx->userdata)->handle);
+        break;
+    case CR_STEP:
+        entt::locator<service>::value().value = static_cast<userdata *>(ctx->userdata)->value;
+        break;
+    case CR_UNLOAD:
+    case CR_CLOSE:
+        break;
+    }
+
+    return 0;
+}

test/lib/locator_plugin/types.h

@@ -0,0 +1,16 @@
+#ifndef ENTT_LIB_LOCATOR_PLUGIN_TYPES_H
+#define ENTT_LIB_LOCATOR_PLUGIN_TYPES_H
+
+#include <entt/locator/locator.hpp>
+
+struct service {
+    int value;
+};
+
+struct userdata {
+    using node_type = typename entt::locator<service>::node_type;
+    node_type handle;
+    int value;
+};
+
+#endif