From eef3cd2d2462fecc41273ec9bee38b9137aae46b Mon Sep 17 00:00:00 2001
From: AliusDieMorietur <ikamqwerty@gmail.com>
Date: Thu, 29 Apr 2021 23:33:40 +0300
Subject: [PATCH] Add tests and example for module nesting

Refs: https://github.com/metarhia/metavm/pull/58

PR-URL: https://github.com/metarhia/metavm/pull/58
---
 test/examples/nestedmodule1.js |  7 +++++
 test/examples/nestedmodule2.js |  6 ++++
 test/unit.js                   | 55 ++++++++++++++++++++++++++++++++++
 3 files changed, 68 insertions(+)
 create mode 100644 test/examples/nestedmodule1.js
 create mode 100644 test/examples/nestedmodule2.js

diff --git a/test/examples/nestedmodule1.js b/test/examples/nestedmodule1.js
new file mode 100644
index 0000000..9d61665
--- /dev/null
+++ 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
new file mode 100644
index 0000000..5a31a27
--- /dev/null
+++ 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
index f9f2ef4..60e4f42 100644
--- 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();
+});