test: basic functionality of readUIntLE()

PR-URL: #10359
Reviewed-By: Julian Duque <julianduquej@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Italo A. Casas <me@italoacasas.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

Author: larissayvette

test/parallel/test-buffer-readuintle.js

@@ -0,0 +1,24 @@
+'use strict';
+require('../common');
+constassert=require('assert');
+
+// testing basic functionality of readUIntLE()
+
+constbuf=Buffer.from([42,84,168,127]);
+constresult=buf.readUIntLE(2);
+
+assert.strictEqual(result,168);
+
+assert.throws(
+()=>{
+buf.readUIntLE(5);
+},
+/Indexoutofrange/
+);
+
+assert.doesNotThrow(
+()=>{
+buf.readUIntLE(5,0,true);
+},
+'readUIntLE() should not throw if noAssert is true'
+);