add unit test

src/def/interfaces.ts

 import { Context } from 'koishi';
-import { KoishiPluginRegistrationOptions, PluginClass } from '../register';
+import { PluginClass } from '../register';
 
 export * from 'koishi-decorators/dist/src/def/interfaces';
 

tests/on-apply.spec.ts

-import { App, Context } from 'koishi';
+import { App, Context, Logger } from 'koishi';
 import {
   DefinePlugin,
   OnApply,
   OnConnect,
   OnDisconnect,
 } from '../src/register';
-import { Inject, InjectContext, Provide } from '../src/decorators';
+import {
+  Inject,
+  InjectContext,
+  Provide,
+  InjectLogger,
+} from '../src/decorators';
 
 declare module 'koishi' {
   // eslint-disable-next-line @typescript-eslint/no-namespace
@@ -32,6 +37,9 @@ class TestingBase implements OnConnect, OnDisconnect, OnApply {
   @InjectContext()
   ctx: Context;
 
+  @InjectLogger()
+  logger: Logger;
+
   onApply() {
     this.applied = true;
   }
@@ -98,4 +106,10 @@ describe('Apply and Connect in koishi-thirdeye', () => {
     app.plugin(MyPlugin3);
     await RunApplyTest(app);
   });
+
+  it('should name logger correctly', () => {
+    app.plugin(MyPlugin);
+    const myPlugin = app.myPlugin;
+    expect(myPlugin.logger.name).toBe('MyPlugin');
+  });
 });