feat: use random port for testing

Author: thetutlage

src/EnvParser/index.ts

@@ -19,12 +19,14 @@ export class EnvParser {
 
   private parser = new Parser(false)
 
+  constructor(private envFileName: string = '.env') {}
+
   /**
    * Parse .env file contents
    */
   public async parse(rootDir: string) {
     try {
-      this.envContents = this.parser.parse(await readFile(join(rootDir, '.env'), 'utf-8'))
+      this.envContents = this.parser.parse(await readFile(join(rootDir, this.envFileName), 'utf-8'))
     } catch {}
   }
 

src/Test/index.ts

@@ -19,6 +19,8 @@ import { TestProcess } from './process'
 import { JapaFlags } from '../Contracts'
 
 import { ENV_FILES, TESTS_ENTRY_FILE } from '../../config/paths'
+import { EnvParser } from '../EnvParser'
+import getPort from 'get-port'
 
 /**
  * Exposes the API to watch project for compilition changes and
@@ -115,6 +117,30 @@ export class TestsServer {
     process.exit()
   }
 
+  /**
+   * Returns the HOST and the PORT environment variables
+   * for the HTTP server
+   */
+  private async getEnvironmentVariables() {
+    const envParser = new EnvParser('.env.test')
+    await envParser.parse(this.appRoot)
+
+    const envOptions = envParser.asEnvObject(['PORT', 'TZ', 'HOST'])
+    const HOST = process.env.HOST || envOptions.HOST || '0.0.0.0'
+    let PORT = Number(process.env.PORT || envOptions.PORT)
+
+    /**
+     * Use the port defined inside ".env.test" file or use
+     * a random port
+     */
+    PORT = await getPort({
+      port: !isNaN(PORT) ? [PORT] : [],
+      host: HOST,
+    })
+
+    return { HOST, PORT: String(PORT) }
+  }
+
   /**
    * Run tests. Use [[watch]] to also watch for file
    * changes
@@ -141,7 +167,7 @@ export class TestsServer {
       filters,
       this.nodeArgs,
       this.logger,
-      {}
+      await this.getEnvironmentVariables()
     ).run()
 
     this.busy = false