assert: add strict functionality export

Requireing the strict version will allow to use `assert.equal`,
`assert.deepEqual` and there negated counterparts to be used with
strict comparison instead of using e.g. `assert.strictEqual`.

The API is identical to the regular assert export and only differs
in the way that all functions use strict compairson.

PR-URL: https://github.com/nodejs/node/pull/17002
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/assert.js b/lib/assert.js
index 304618fb3d..e5cc338c98 100644
--- a/lib/assert.js
+++ b/lib/assert.js
@@ -207,3 +207,15 @@ assert.doesNotThrow = function doesNotThrow(block, error, message) {
 };
 
 assert.ifError = function ifError(err) { if (err) throw err; };
+
+// Expose a strict only variant of assert
+function strict(value, message) {
+  if (!value) innerFail(value, true, message, '==', strict);
+}
+assert.strict = Object.assign(strict, assert, {
+  equal: assert.strictEqual,
+  deepEqual: assert.deepStrictEqual,
+  notEqual: assert.notStrictEqual,
+  notDeepEqual: assert.notDeepStrictEqual
+});
+assert.strict.strict = assert.strict;