ci: Configure eslint for benchmark cli (#10480)

packages/@n8n/benchmark/.eslintrc.js

@@ -0,0 +1,30 @@
+const sharedOptions = require('@n8n_io/eslint-config/shared');
+
+/**
+ * @type {import('@types/eslint').ESLint.ConfigData}
+ */
+module.exports = {
+	extends: ['@n8n_io/eslint-config/node'],
+
+	...sharedOptions(__dirname),
+
+	parserOptions: {
+		project: './tsconfig.json',
+	},
+
+	ignorePatterns: ['scenarios/**'],
+
+	rules: {
+		'n8n-local-rules/no-plain-errors': 'off',
+		complexity: 'error',
+	},
+
+	overrides: [
+		{
+			files: ['./src/commands/*.ts'],
+			rules: {
+				'import/no-default-export': 'off',
+			},
+		},
+	],
+};

packages/@n8n/benchmark/package.json

@@ -5,6 +5,8 @@
   "main": "dist/index",
   "scripts": {
     "build": "tsc -p tsconfig.build.json && tsc-alias -p tsconfig.build.json",
+    "lint": "eslint .",
+    "lintfix": "eslint . --fix",
     "start": "./bin/n8n-benchmark",
     "test": "echo \"Error: no test specified\" && exit 1",
     "typecheck": "tsc --noEmit",

packages/@n8n/benchmark/src/n8nApiClient/authenticatedN8nApiClient.ts

@@ -1,6 +1,6 @@
 import { strict as assert } from 'node:assert';
+import type { AxiosRequestConfig } from 'axios';
 import { N8nApiClient } from './n8nApiClient';
-import { AxiosRequestConfig } from 'axios';
 
 export class AuthenticatedN8nApiClient extends N8nApiClient {
 	constructor(

packages/@n8n/benchmark/src/n8nApiClient/n8nApiClient.ts

@@ -1,4 +1,5 @@
-import axios, { AxiosError, AxiosRequestConfig } from 'axios';
+import type { AxiosError, AxiosRequestConfig } from 'axios';
+import axios from 'axios';
 
 export class N8nApiClient {
 	constructor(public readonly apiBaseUrl: string) {}
@@ -11,7 +12,7 @@ export class N8nApiClient {
 
 		while (Date.now() - START_TIME < TIMEOUT_MS) {
 			try {
-				const response = await axios.request({
+				const response = await axios.request<{ status: 'ok' }>({
 					url: `${this.apiBaseUrl}/${HEALTH_ENDPOINT}`,
 					method: 'GET',
 				});
@@ -72,7 +73,7 @@ export class N8nApiClient {
 		return `${this.apiBaseUrl}/rest${endpoint}`;
 	}
 
-	private delay(ms: number): Promise<void> {
-		return new Promise((resolve) => setTimeout(resolve, ms));
+	private async delay(ms: number): Promise<void> {
+		return await new Promise((resolve) => setTimeout(resolve, ms));
 	}
 }

packages/@n8n/benchmark/src/n8nApiClient/workflowsApiClient.ts

@@ -1,5 +1,5 @@
-import { Workflow } from '@/n8nApiClient/n8nApiClient.types';
-import { AuthenticatedN8nApiClient } from './authenticatedN8nApiClient';
+import type { AuthenticatedN8nApiClient } from './authenticatedN8nApiClient';
+import type { Workflow } from '@/n8nApiClient/n8nApiClient.types';
 
 export class WorkflowApiClient {
 	constructor(private readonly apiClient: AuthenticatedN8nApiClient) {}

packages/@n8n/benchmark/src/scenario/scenarioDataLoader.ts

@@ -1,7 +1,7 @@
-import fs from 'node:fs';
-import path from 'node:path';
-import { Scenario } from '@/types/scenario';
-import { Workflow } from '@/n8nApiClient/n8nApiClient.types';
+import * as fs from 'node:fs';
+import * as path from 'node:path';
+import type { Scenario } from '@/types/scenario';
+import type { Workflow } from '@/n8nApiClient/n8nApiClient.types';
 
 /**
  * Loads scenario data files from FS
@@ -25,11 +25,10 @@ export class ScenarioDataFileLoader {
 		const fileContent = fs.readFileSync(workflowFilePath, 'utf8');
 
 		try {
-			return JSON.parse(fileContent);
+			return JSON.parse(fileContent) as Workflow;
 		} catch (error) {
-			throw new Error(
-				`Failed to parse workflow file ${workflowFilePath}: ${error instanceof Error ? error.message : error}`,
-			);
+			const e = error as Error;
+			throw new Error(`Failed to parse workflow file ${workflowFilePath}: ${e.message}`);
 		}
 	}
 }

packages/@n8n/benchmark/src/scenario/scenarioLoader.ts

@@ -48,7 +48,11 @@ export class ScenarioLoader {
 	private loadAndValidateScenarioManifest(
 		scenarioManifestPath: string,
 	): [ScenarioManifest, null] | [null, string[]] {
-		const scenario = JSON.parse(fs.readFileSync(scenarioManifestPath, 'utf8'));
+		const [scenario, error] = this.loadScenarioManifest(scenarioManifestPath);
+		if (!scenario) {
+			return [null, [error]];
+		}
+
 		const validationErrors: string[] = [];
 
 		if (!scenario.name) {
@@ -61,6 +65,21 @@ export class ScenarioLoader {
 		return validationErrors.length === 0 ? [scenario, null] : [null, validationErrors];
 	}
 
+	private loadScenarioManifest(
+		scenarioManifestPath: string,
+	): [ScenarioManifest, null] | [null, string] {
+		try {
+			const scenario = JSON.parse(
+				fs.readFileSync(scenarioManifestPath, 'utf8'),
+			) as ScenarioManifest;
+
+			return [scenario, null];
+		} catch (error) {
+			const message = error instanceof Error ? error.message : JSON.stringify(error);
+			return [null, `Failed to parse manifest ${scenarioManifestPath}: ${message}`];
+		}
+	}
+
 	private formScenarioId(scenarioPath: string): string {
 		return createHash('sha256').update(scenarioPath).digest('hex');
 	}

packages/@n8n/benchmark/src/testExecution/k6Executor.ts

@@ -1,5 +1,5 @@
 import { $, which } from 'zx';
-import { Scenario } from '@/types/scenario';
+import type { Scenario } from '@/types/scenario';
 
 /**
  * Executes test scenarios using k6
@@ -24,7 +24,7 @@ export class K6Executor {
 		})`${k6ExecutablePath} run --quiet --stage ${stage} ${scenario.scriptPath}`;
 
 		for await (const chunk of processPromise.stdout) {
-			console.log(chunk.toString());
+			console.log((chunk as Buffer).toString());
 		}
 	}
 

packages/@n8n/benchmark/src/testExecution/scenarioDataImporter.ts

@@ -1,5 +1,5 @@
-import { AuthenticatedN8nApiClient } from '@/n8nApiClient/authenticatedN8nApiClient';
-import { Workflow } from '@/n8nApiClient/n8nApiClient.types';
+import type { AuthenticatedN8nApiClient } from '@/n8nApiClient/authenticatedN8nApiClient';
+import type { Workflow } from '@/n8nApiClient/n8nApiClient.types';
 import { WorkflowApiClient } from '@/n8nApiClient/workflowsApiClient';
 
 /**

packages/@n8n/benchmark/src/testExecution/scenarioRunner.ts

@@ -1,7 +1,7 @@
-import { Scenario } from '@/types/scenario';
-import { N8nApiClient } from '@/n8nApiClient/n8nApiClient';
-import { ScenarioDataFileLoader } from '@/scenario/scenarioDataLoader';
-import { K6Executor } from './k6Executor';
+import type { K6Executor } from './k6Executor';
+import type { Scenario } from '@/types/scenario';
+import type { N8nApiClient } from '@/n8nApiClient/n8nApiClient';
+import type { ScenarioDataFileLoader } from '@/scenario/scenarioDataLoader';
 import { ScenarioDataImporter } from '@/testExecution/scenarioDataImporter';
 import { AuthenticatedN8nApiClient } from '@/n8nApiClient/authenticatedN8nApiClient';