first commit

packages/@n8n/vitest-config/frontend.ts

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+import { defineConfig } from 'vitest/config';
+import type { InlineConfig } from 'vitest/node';
+
+export const createVitestConfig = (options: InlineConfig = {}) => {
+	const vitestConfig = defineConfig({
+		test: {
+			silent: true,
+			globals: true,
+			environment: 'jsdom',
+			setupFiles: ['./src/__tests__/setup.ts'],
+			reporters: process.env.CI === 'true' ? ['default', 'junit'] : ['default'],
+			outputFile: { junit: './junit.xml' },
+			coverage: {
+				enabled: false,
+				all: false,
+				provider: 'v8',
+				reporter: ['text-summary', 'lcov', 'html-spa'],
+			},
+			css: {
+				modules: {
+					classNameStrategy: 'non-scoped',
+				},
+			},
+			...options,
+		},
+	});
+
+	if (process.env.COVERAGE_ENABLED === 'true' && vitestConfig.test?.coverage) {
+		const { coverage } = vitestConfig.test;
+		coverage.enabled = true;
+		if (process.env.CI === 'true' && coverage.provider === 'v8') {
+			coverage.all = true;
+			coverage.reporter = ['cobertura'];
+		}
+	}
+
+	return vitestConfig;
+};
+
+export const vitestConfig = createVitestConfig();

packages/@n8n/vitest-config/node-decorators.ts

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+import swc from 'unplugin-swc';
+import { mergeConfig } from 'vitest/config';
+import type { InlineConfig } from 'vitest/node';
+import { createVitestConfig } from './node.js';
+
+const swcPlugin = swc.vite({
+	jsc: {
+		parser: {
+			syntax: 'typescript',
+			decorators: true,
+		},
+		transform: {
+			legacyDecorator: true,
+			decoratorMetadata: true,
+		},
+		target: 'es2022',
+	},
+	// Include node_modules TypeScript files (like @n8n/tournament)
+	exclude: [],
+});
+
+export const createVitestConfigWithDecorators = (options: InlineConfig = {}) => {
+	const baseConfig = createVitestConfig(options);
+	return mergeConfig(baseConfig, {
+		plugins: [swcPlugin],
+		esbuild: false, // Disable esbuild - it doesn't support decoratorMetadata
+		server: {
+			deps: {
+				// Inline all dependencies so SWC can transform them (including TypeScript in node_modules)
+				inline: [/.*/],
+			},
+		},
+	});
+};
+
+export const vitestConfigWithDecorators = createVitestConfigWithDecorators();

packages/@n8n/vitest-config/node.ts

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+import { defineConfig } from 'vitest/config';
+import type { InlineConfig } from 'vitest/node';
+
+export const createVitestConfig = (options: InlineConfig = {}) => {
+	const vitestConfig = defineConfig({
+		test: {
+			silent: true,
+			globals: true,
+			environment: 'node',
+			reporters: process.env.CI === 'true' ? ['default', 'junit'] : ['default'],
+			outputFile: { junit: './junit.xml' },
+			...(process.env.COVERAGE_ENABLED === 'true'
+				? {
+						coverage: {
+							enabled: true,
+							provider: 'v8',
+							reporter: process.env.CI === 'true' ? 'cobertura' : 'text-summary',
+							all: true,
+						},
+					}
+				: {}),
+			...options,
+		},
+	});
+
+	return vitestConfig;
+};
+
+export const vitestConfig = createVitestConfig();

packages/@n8n/vitest-config/package.json

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+{
+  "name": "@n8n/vitest-config",
+  "version": "1.7.0",
+  "type": "module",
+  "peerDependencies": {
+    "vite": "catalog:",
+    "vitest": "catalog:"
+  },
+  "dependencies": {
+    "unplugin-swc": "^1.5.1"
+  },
+  "devDependencies": {
+    "@n8n/typescript-config": "workspace:*",
+    "@swc/core": "^1.10.7",
+    "vite": "catalog:",
+    "vitest": "catalog:"
+  },
+  "files": [
+    "backend.mjs",
+    "frontend.mjs"
+  ],
+  "exports": {
+    "./backend": {
+      "import": "./backend.mjs",
+      "require": "./backend.mjs",
+      "types": "./backend.d.ts"
+    },
+    "./frontend": {
+      "import": "./dist/frontend.js",
+      "require": "./dist/frontend.js",
+      "types": "./dist/frontend.d.ts"
+    },
+    "./node": {
+      "import": "./dist/node.js",
+      "require": "./dist/node.js",
+      "types": "./dist/node.d.ts"
+    },
+    "./node-decorators": {
+      "import": "./dist/node-decorators.js",
+      "require": "./dist/node-decorators.js",
+      "types": "./dist/node-decorators.d.ts"
+    }
+  },
+  "scripts": {
+    "clean": "rimraf dist .turbo",
+    "dev": "pnpm watch",
+    "typecheck": "tsc --noEmit",
+    "build": "tsc -p tsconfig.build.json",
+    "format": "biome format --write .",
+    "format:check": "biome ci .",
+    "watch": "tsc -p tsconfig.build.json --watch"
+  },
+  "license": "See LICENSE.md file in the root of the repository"
+}

packages/@n8n/vitest-config/tsconfig.build.json

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+{
+	"extends": ["./tsconfig.json", "@n8n/typescript-config/tsconfig.build.json"],
+	"compilerOptions": {
+		"composite": true,
+		"rootDir": ".",
+		"outDir": "dist",
+		"tsBuildInfoFile": "dist/build.tsbuildinfo"
+	},
+	"include": ["**/*.ts"],
+	"exclude": ["dist", "**/*.test.ts"]
+}

packages/@n8n/vitest-config/tsconfig.json

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+{
+	"extends": "@n8n/typescript-config/tsconfig.common.json",
+	"compilerOptions": {
+		"rootDir": ".",
+		"types": ["node"],
+		"baseUrl": ".",
+		"module": "ESNext",
+		"moduleResolution": "bundler",
+		"tsBuildInfoFile": "dist/typecheck.tsbuildinfo"
+	},
+	"include": ["**/*.ts"],
+	"exclude": ["dist"]
+}