fix: do not start dev servers when reading tests

src/base-testplane.ts

@@ -17,6 +17,7 @@ import { ConfigInput } from "./config/types";
 export abstract class BaseTestplane extends AsyncEmitter {
     protected _interceptors: Interceptor[] = [];
     protected _config: Config;
+    protected _initEventEmited: boolean = false;
 
     static create<T extends BaseTestplane>(
         this: new (config?: string | ConfigInput) => T,
@@ -38,8 +39,13 @@ export abstract class BaseTestplane extends AsyncEmitter {
         this._loadPlugins();
     }
 
-    protected async _init(): Promise<void> {
-        this._init = (): Promise<void> => Promise.resolve(); // init only once
+    /** @note Only the first call returns a promise to wait for INIT handlers to complete, subsequent calls return immediately to avoid deadlocks */
+    protected async _emitInitEventOnce(): Promise<void> {
+        if (this._initEventEmited) {
+            return;
+        }
+
+        this._initEventEmited = true;
         await this.emitAndWait(MasterEvents.INIT);
     }
 

src/testplane.ts

@@ -109,7 +109,7 @@ export class Testplane extends BaseTestplane {
         this._filesToRemove.push(path);
     }
 
-    protected async _init(): Promise<void> {
+    protected async _startServersIfNeeded(): Promise<void> {
         await initDevServer({
             testplane: this,
             devServerConfig: this._config.devServer,
@@ -124,8 +124,6 @@ export class Testplane extends BaseTestplane {
                 throw new Error(`Vite server failed to start: ${(err as Error).message}`);
             }
         }
-
-        return super._init();
     }
 
     async run(
@@ -185,7 +183,8 @@ export class Testplane extends BaseTestplane {
         eventsUtils.passthroughEventAsync(this.runner, this, _.values(MasterAsyncEvents));
         eventsUtils.passthroughEventAsync(signalHandler, this, MasterEvents.EXIT);
 
-        await this._init();
+        await this._startServersIfNeeded();
+        await this._emitInitEventOnce();
 
         runner.init();
 
@@ -267,7 +266,7 @@ export class Testplane extends BaseTestplane {
         const testReader = TestReader.create(this._config);
 
         if (!silent) {
-            await this._init();
+            await this._emitInitEventOnce();
 
             eventsUtils.passthroughEvent(testReader, this, [
                 MasterEvents.BEFORE_FILE_READ,

src/worker/testplane.ts

@@ -58,7 +58,7 @@ export class Testplane extends BaseTestplane {
     }
 
     async init(): Promise<void> {
-        await this._init();
+        await this._emitInitEventOnce();
 
         if (typeof expect === "undefined") {
             // eslint-disable-next-line @typescript-eslint/no-var-requires