test: ts esnext (#2584)

Author: anshumanv

test/build/config-format/typescript-esnext/main.ts

@@ -0,0 +1 @@
+console.log('Rimuru Tempest');

test/build/config-format/typescript-esnext/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "module"
+}

test/build/config-format/typescript-esnext/tsconfig.json

@@ -0,0 +1,6 @@
+{
+  "compilerOptions": {
+    "module": "esnext",
+    "allowSyntheticDefaultImports": true
+  }
+}

test/build/config-format/typescript-esnext/typescript.test.js

@@ -0,0 +1,30 @@
+// eslint-disable-next-line node/no-unpublished-require
+const { run, isWebpack5 } = require('../../../utils/test-utils');
+const { existsSync } = require('fs');
+const { resolve } = require('path');
+
+describe('webpack cli', () => {
+    it('should support typescript esnext file', async () => {
+        const isMacOS = process.platform === 'darwin';
+        const majorNodeVersion = process.version.slice(1, 3);
+        if (majorNodeVersion < 14) {
+            expect(true).toBe(true);
+
+            return;
+        }
+
+        if (isMacOS && !isWebpack5) {
+            expect(true).toBe(true);
+
+            return;
+        }
+
+        const { exitCode, stderr, stdout } = await run(__dirname, ['-c', './webpack.config.ts'], {
+            nodeOptions: ['--loader=ts-node/esm'],
+        });
+        expect(stderr).not.toBeFalsy();
+        expect(stdout).toBeTruthy();
+        expect(exitCode).toBe(0);
+        expect(existsSync(resolve(__dirname, 'dist/foo.bundle.js'))).toBeTruthy();
+    });
+});

test/build/config-format/typescript-esnext/webpack.config.ts

@@ -0,0 +1,13 @@
+/* eslint-disable node/no-unsupported-features/es-syntax */
+import * as path from 'path';
+
+const config = {
+    mode: 'production',
+    entry: './main.ts',
+    output: {
+        path: path.resolve('dist'),
+        filename: 'foo.bundle.js',
+    },
+};
+
+export default config;