1 files changed, 113 insertions, 0 deletions
diff --git a/tests/node_compat/test/parallel/test-buffer-read.js b/tests/node_compat/test/parallel/test-buffer-read.js
new file mode 100644
index 000000000..391b309a8
--- /dev/null
+++ b/tests/node_compat/test/parallel/test-buffer-read.js
@@ -0,0 +1,113 @@
+// deno-fmt-ignore-file
+// deno-lint-ignore-file
+
+// Copyright Joyent and Node contributors. All rights reserved. MIT license.
+// Taken from Node 18.12.1
+// This file is automatically generated by `tools/node_compat/setup.ts`. Do not modify this file manually.
+
+'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, args[1]),
+    { code: 'ERR_OUT_OF_RANGE' }
+  );
+}
+
+// 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, 2], 0x48ea);
+read(buf, 'readUIntLE', [2, 2], 0xea48);
+
+// Error name and message
+const OOR_ERROR =
+{
+  name: 'RangeError'
+};
+
+const OOB_ERROR =
+{
+  name: 'RangeError',
+  message: 'Attempt to access memory outside buffer bounds'
+};
+
+// Attempt to overflow buffers, similar to previous bug in array buffers
+assert.throws(
+  () => Buffer.allocUnsafe(8).readFloatBE(0xffffffff), OOR_ERROR);
+
+assert.throws(
+  () => Buffer.allocUnsafe(8).readFloatLE(0xffffffff), OOR_ERROR);
+
+// Ensure negative values can't get past offset
+assert.throws(
+  () => Buffer.allocUnsafe(8).readFloatBE(-1), OOR_ERROR);
+assert.throws(
+  () => Buffer.allocUnsafe(8).readFloatLE(-1), OOR_ERROR);
+
+// Offset checks
+{
+  const buf = Buffer.allocUnsafe(0);
+
+  assert.throws(
+    () => buf.readUInt8(0), OOB_ERROR);
+  assert.throws(
+    () => buf.readInt8(0), OOB_ERROR);
+}
+
+[16, 32].forEach((bit) => {
+  const buf = Buffer.allocUnsafe(bit / 8 - 1);
+  [`Int${bit}B`, `Int${bit}L`, `UInt${bit}B`, `UInt${bit}L`].forEach((fn) => {
+    assert.throws(
+      () => buf[`read${fn}E`](0), OOB_ERROR);
+  });
+});
+
+[16, 32].forEach((bits) => {
+  const buf = Buffer.from([0xFF, 0xFF, 0xFF, 0xFF]);
+  ['LE', 'BE'].forEach((endian) => {
+    assert.strictEqual(buf[`readUInt${bits}${endian}`](0),
+                       (0xFFFFFFFF >>> (32 - bits)));
+
+    assert.strictEqual(buf[`readInt${bits}${endian}`](0),
+                       (0xFFFFFFFF >> (32 - bits)));
+  });
+});