Add tests and example for module nesting

Refs: #58 PR-URL: #58
metarhia · Apr 11, 2022 · eef3cd2 · eef3cd2
1 parent 673ca52
commit eef3cd2
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diff --git a/test/examples/nestedmodule1.js b/test/examples/nestedmodule1.js
@@ -0,0 +1,7 @@
+/* eslint-disable */
+({
+  name: 'nestedmodule1',
+  value: 1,
+  nested: require('./test/examples/nestedmodule2.js'),
+});
+/* eslint-enable */
diff --git a/test/examples/nestedmodule2.js b/test/examples/nestedmodule2.js
@@ -0,0 +1,6 @@
+/* eslint-disable */
+({
+  name: 'nestedmodule2',
+  value: 2,
+});
+/* eslint-enable */
diff --git a/test/unit.js b/test/unit.js
@@ -1,5 +1,6 @@
 'use strict';
 
+const fs = require('fs');
 const metavm = require('..');
 const path = require('path');
 const metatests = require('metatests');
@@ -184,3 +185,57 @@ metatests.test('Call undefined as a function', async (test) => {
   }
   test.end();
 });
+
+metatests.test('Metarequire node internal module', async (test) => {
+  const sandbox = {};
+  sandbox.global = sandbox;
+  sandbox.require = metavm.metarequire(sandbox, { fs });
+  const context = metavm.createContext(sandbox);
+  const src = `({ fs: require('fs') })`;
+  const ms = metavm.createScript('Example', src, { context });
+  test.strictSame(typeof ms.exports, 'object');
+  test.strictSame(typeof ms.exports.fs.promises, 'object');
+  test.end();
+});
+
+metatests.test('Metarequire internal not permitted', async (test) => {
+  const sandbox = {};
+  sandbox.global = sandbox;
+  sandbox.require = metavm.metarequire(sandbox);
+  const context = metavm.createContext(sandbox);
+  const src = `({ fs: require('fs') })`;
+  try {
+    const ms = metavm.createScript('Example', src, { context });
+    test.strictSame(ms, undefined);
+  } catch (err) {
+    test.strictSame(err.message, `Cannot find module: 'fs'`);
+  }
+  test.end();
+});
+
+metatests.test('Metarequire non-existent module', async (test) => {
+  const sandbox = {};
+  sandbox.global = sandbox;
+  sandbox.require = metavm.metarequire(sandbox);
+  const context = metavm.createContext(sandbox);
+  const src = `({ notExist: require('nothing') })`;
+  try {
+    const ms = metavm.createScript('Example', src, { context });
+    test.strictSame(ms, undefined);
+  } catch (err) {
+    test.strictSame(err.message, `Cannot find module: 'nothing'`);
+  }
+  test.end();
+});
+
+metatests.test('Metarequire nestsed modules', async (test) => {
+  const sandbox = {};
+  sandbox.global = sandbox;
+  sandbox.require = metavm.metarequire(sandbox);
+  const context = metavm.createContext(sandbox);
+  const src = `({ loaded: require('./test/examples/nestedmodule1.js') })`;
+  const ms = metavm.createScript('Example', src, { context });
+  test.strictSame(ms.exports.loaded.exports.value, 1);
+  test.strictSame(ms.exports.loaded.exports.nested.exports.value, 2);
+  test.end();
+});