refactor: Consolidate tsconfig and eslintrc files (no-changelog) (#6816)

Co-authored-by: Csaba Tuncsik <csaba@n8n.io>

jest.config.js

@@ -6,10 +6,11 @@ const tsJestOptions = {
 		...compilerOptions,
 		declaration: false,
 		sourceMap: true,
-		skipLibCheck: true,
 	},
 };
 
+const { baseUrl, paths } = require('get-tsconfig').getTsconfig().config?.compilerOptions;
+
 /** @type {import('jest').Config} */
 const config = {
 	verbose: true,
@@ -19,9 +20,14 @@ const config = {
 	transform: {
 		'^.+\\.ts$': ['ts-jest', tsJestOptions],
 	},
-	moduleNameMapper: {
-		'^@/(.*)$': '<rootDir>/src/$1',
-	},
+	// This resolve the path mappings from the tsconfig relative to each jest.config.js
+	moduleNameMapper: Object.entries(paths || {}).reduce((acc, [path, [mapping]]) => {
+		path = `^${path.replace(/\/\*$/, '/(.*)$')}`;
+		mapping = mapping.replace(/^\.\/(?:(.*)\/)?\*$/, '$1');
+		mapping = mapping ? `/${mapping}` : '';
+		acc[path] = '<rootDir>' + (baseUrl ? `/${baseUrl.replace(/^\.\//, '')}` : '') + mapping + '/$1';
+		return acc;
+	}, {}),
 	setupFilesAfterEnv: ['jest-expect-message'],
 	collectCoverage: true,
 	coverageReporters: [process.env.COVERAGE_REPORT === 'true' ? 'text' : 'text-summary'],