From 0b4055e616bbf53bf4561527e67934aa401365f0 Mon Sep 17 00:00:00 2001
From: Rich Trott <rtrott@gmail.com>
Date: Tue, 5 Feb 2019 21:05:24 -0800
Subject: [PATCH] assert: create internal/assert micro-module

For use in built-in modules that could benefit from `assert()` without
having to load the entire module (unless an AssertionError actually
occurs): lib/internal/assert.js.

PR-URL: https://github.com/nodejs/node/pull/25956
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>
---
 lib/internal/assert.js                |  9 +++++++++
 node.gyp                              |  1 +
 test/parallel/test-internal-assert.js | 15 +++++++++++++++
 3 files changed, 25 insertions(+)
 create mode 100644 lib/internal/assert.js
 create mode 100644 test/parallel/test-internal-assert.js

diff --git a/lib/internal/assert.js b/lib/internal/assert.js
new file mode 100644
index 00000000000000..b5eb88c93b61db
--- /dev/null
+++ b/lib/internal/assert.js
@@ -0,0 +1,9 @@
+'use strict';
+
+function assert(value, message) {
+  if (!value) {
+    require('assert')(value, message);
+  }
+}
+
+module.exports = assert;
diff --git a/node.gyp b/node.gyp
index 1490f7910ec290..7fc9e85cc33741 100644
--- a/node.gyp
+++ b/node.gyp
@@ -84,6 +84,7 @@
       'lib/vm.js',
       'lib/worker_threads.js',
       'lib/zlib.js',
+      'lib/internal/assert.js',
       'lib/internal/assert/assertion_error.js',
       'lib/internal/async_hooks.js',
       'lib/internal/bash_completion.js',
diff --git a/test/parallel/test-internal-assert.js b/test/parallel/test-internal-assert.js
new file mode 100644
index 00000000000000..b34657d3a67f84
--- /dev/null
+++ b/test/parallel/test-internal-assert.js
@@ -0,0 +1,15 @@
+// Flags: --expose-internals
+'use strict';
+
+require('../common');
+
+const assert = require('assert');
+const internalAssert = require('internal/assert');
+
+// Should not throw.
+internalAssert(true);
+internalAssert(true, 'fhqwhgads');
+
+assert.throws(() => { internalAssert(false); }, assert.AssertionError);
+assert.throws(() => { internalAssert(false, 'fhqwhgads'); },
+              { code: 'ERR_ASSERTION', message: 'fhqwhgads' });