test: add test for noAssert option in buf.read*()

PR-URL: nodejs#10713
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-buffer-read-noassert.js

@@ -0,0 +1,59 @@
+'use strict';
+require('../common');
+const assert = require('assert');
+
+// testing basic buffer read functions
+const buf = Buffer.from([0xa4, 0xfd, 0x48, 0xea, 0xcf, 0xff, 0xd9, 0x01, 0xde]);
+
+function read(buff, funx, args, expected) {
+
+  assert.strictEqual(buff[funx](...args), expected);
+  assert.throws(
+    () => buff[funx](-1),
+    /^RangeError: Index out of range$/
+  );
+
+  assert.doesNotThrow(
+  () => assert.strictEqual(buff[funx](...args, true), expected),
+  'noAssert does not change return value for valid ranges'
+);
+
+}
+
+// testing basic functionality of readDoubleBE() and readDOubleLE()
+read(buf, 'readDoubleBE', [1], -3.1827727774563287e+295);
+read(buf, 'readDoubleLE', [1], -6.966010051009108e+144);
+
+// testing basic functionality of readFLoatBE() and readFloatLE()
+read(buf, 'readFloatBE', [1], -1.6691549692541768e+37);
+read(buf, 'readFloatLE', [1], -7861303808);
+
+// testing basic functionality of readInt8()
+read(buf, 'readInt8', [1], -3);
+
+// testing basic functionality of readInt16BE() and readInt16LE()
+read(buf, 'readInt16BE', [1], -696);
+read(buf, 'readInt16LE', [1], 0x48fd);
+
+// testing basic functionality of readInt32BE() and readInt32LE()
+read(buf, 'readInt32BE', [1], -45552945);
+read(buf, 'readInt32LE', [1], -806729475);
+
+// testing basic functionality of readIntBE() and readIntLE()
+read(buf, 'readIntBE', [1, 1], -3);
+read(buf, 'readIntLE', [2, 1], 0x48);
+
+// testing basic functionality of readUInt8()
+read(buf, 'readUInt8', [1], 0xfd);
+
+// testing basic functionality of readUInt16BE() and readUInt16LE()
+read(buf, 'readUInt16BE', [2], 0x48ea);
+read(buf, 'readUInt16LE', [2], 0xea48);
+
+// testing basic functionality of readUInt32BE() and readUInt32LE()
+read(buf, 'readUInt32BE', [1], 0xfd48eacf);
+read(buf, 'readUInt32LE', [1], 0xcfea48fd);
+
+// testing basic functionality of readUIntBE() and readUIntLE()
+read(buf, 'readUIntBE', [2, 0], 0xfd);
+read(buf, 'readUIntLE', [2, 0], 0x48);