jest-isa.js

Basic instanceof, but with slightly more advanced checking
git clone git://git.finwo.net/lib/jest-isa.js
Log | Files | Refs | README
commit 9e707a0c7fc648cee5b21c67872b4c03a8ca86bc
parent 1085a98482ddbe1b58190495ed1916a767907c02
Author: finwo <finwo@pm.me>
Date:   Sun, 24 May 2026 22:39:51 +0200

Blind-written readme

Diffstat:

AREADME.md | 17+++++++++++++++++


1 file changed, 17 insertions(+), 0 deletions(-)

diff --git a/README.md b/README.md
@@ -0,0 +1,17 @@
+# jest-isa
+
+Basic instanceof, but with slightly more advanced checking
+
+## Usage
+
+```js
+const isA = require('jest-isa');
+const jest = require('jest');
+
+jest.expect.extend({
+  isA,
+});
+
+test('is a function range', () => expect(function(){}).isA(Function));
+test('is a string'        , () => expect("").isA(String));
+```