test: rework lib stuff to share common files

test/lib/dispatcher/plugin/main.cpp

@@ -0,0 +1,35 @@
+#define CR_HOST
+
+#include <gtest/gtest.h>
+#include <cr.h>
+#include <entt/signal/dispatcher.hpp>
+#include <entt/signal/sigh.hpp>
+#include "types.h"
+
+struct listener {
+    void on(message msg) {
+        value = msg.payload;
+    }
+
+    int value{};
+};
+
+TEST(Lib, Dispatcher) {
+    entt::dispatcher dispatcher;
+    listener listener;
+
+    ASSERT_EQ(listener.value, 0);
+
+    dispatcher.sink<message>().connect<&listener::on>(listener);
+
+    cr_plugin ctx;
+    cr_plugin_load(ctx, PLUGIN);
+
+    ctx.userdata = &dispatcher;
+    cr_plugin_update(ctx);
+
+    ASSERT_EQ(listener.value, 42);
+
+    dispatcher = {};
+    cr_plugin_close(ctx);
+}

test/lib/dispatcher/plugin/plugin.cpp

@@ -0,0 +1,19 @@
+#include <cr.h>
+#include <entt/signal/dispatcher.hpp>
+#include "types.h"
+
+CR_EXPORT int cr_main(cr_plugin *ctx, cr_op operation) {
+    switch(operation) {
+    case CR_STEP:
+        static_cast<entt::dispatcher *>(ctx->userdata)->trigger<event>();
+        static_cast<entt::dispatcher *>(ctx->userdata)->trigger(message{42});
+        break;
+    case CR_CLOSE:
+    case CR_LOAD:
+    case CR_UNLOAD:
+        // nothing to do here, this is only a test.
+        break;
+    }
+
+    return 0;
+}

test/lib/dispatcher/plugin/types.h

@@ -0,0 +1,10 @@
+#ifndef ENTT_LIB_DISPATCHER_PLUGIN_TYPES_H
+#define ENTT_LIB_DISPATCHER_PLUGIN_TYPES_H
+
+struct message {
+    int payload;
+};
+
+struct event {};
+
+#endif