♻️ rewrite dependency injection system

tests/test_init.py

@@ -1,6 +1,12 @@
 import os
+import sys
+from typing import TYPE_CHECKING, Set
 
 import pytest
+from utils import load_plugin
+
+if TYPE_CHECKING:
+    from nonebot.plugin import Plugin
 
 os.environ["CONFIG_FROM_ENV"] = "env"
 
@@ -17,3 +23,14 @@ async def test_init(nonebug_init):
     assert config.config_from_env == "env"
     assert config.config_from_init == "init"
     assert config.common_config == "common"
+
+
+@pytest.mark.asyncio
+async def test_load_plugin(load_plugin: Set["Plugin"]):
+    import nonebot
+
+    assert nonebot.get_loaded_plugins() == load_plugin
+    plugin = nonebot.get_plugin("depends")
+    assert plugin
+    assert plugin.module_name == "plugins.depends"
+    assert "plugins.depends" in sys.modules