1 files changed, 107 insertions, 0 deletions
diff --git a/tests/node_compat/test/parallel/test-buffer-concat.js b/tests/node_compat/test/parallel/test-buffer-concat.js
new file mode 100644
index 000000000..5d2e2c4a5
--- /dev/null
+++ b/tests/node_compat/test/parallel/test-buffer-concat.js
@@ -0,0 +1,107 @@
+// 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.
+
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+
+const zero = [];
+const one = [ Buffer.from('asdf') ];
+const long = [];
+for (let i = 0; i < 10; i++) long.push(Buffer.from('asdf'));
+
+const flatZero = Buffer.concat(zero);
+const flatOne = Buffer.concat(one);
+const flatLong = Buffer.concat(long);
+const flatLongLen = Buffer.concat(long, 40);
+
+assert.strictEqual(flatZero.length, 0);
+assert.strictEqual(flatOne.toString(), 'asdf');
+
+const check = 'asdf'.repeat(10);
+
+// A special case where concat used to return the first item,
+// if the length is one. This check is to make sure that we don't do that.
+assert.notStrictEqual(flatOne, one[0]);
+assert.strictEqual(flatLong.toString(), check);
+assert.strictEqual(flatLongLen.toString(), check);
+
+[undefined, null, Buffer.from('hello')].forEach((value) => {
+  assert.throws(() => {
+    Buffer.concat(value);
+  }, {
+    code: 'ERR_INVALID_ARG_TYPE',
+    message: 'The "list" argument must be an instance of Array.' +
+             `${common.invalidArgTypeHelper(value)}`
+  });
+});
+
+[[42], ['hello', Buffer.from('world')]].forEach((value) => {
+  assert.throws(() => {
+    Buffer.concat(value);
+  }, {
+    code: 'ERR_INVALID_ARG_TYPE',
+    message: 'The "list[0]" argument must be an instance of Buffer ' +
+             `or Uint8Array.${common.invalidArgTypeHelper(value[0])}`
+  });
+});
+
+assert.throws(() => {
+  Buffer.concat([Buffer.from('hello'), 3]);
+}, {
+  code: 'ERR_INVALID_ARG_TYPE',
+  message: 'The "list[1]" argument must be an instance of Buffer ' +
+           'or Uint8Array. Received type number (3)'
+});
+
+// eslint-disable-next-line node-core/crypto-check
+const random10 = common.hasCrypto ?
+  require('crypto').randomBytes(10) :
+  Buffer.alloc(10, 1);
+const empty = Buffer.alloc(0);
+
+assert.notDeepStrictEqual(random10, empty);
+assert.notDeepStrictEqual(random10, Buffer.alloc(10));
+
+assert.deepStrictEqual(Buffer.concat([], 100), empty);
+assert.deepStrictEqual(Buffer.concat([random10], 0), empty);
+assert.deepStrictEqual(Buffer.concat([random10], 10), random10);
+assert.deepStrictEqual(Buffer.concat([random10, random10], 10), random10);
+assert.deepStrictEqual(Buffer.concat([empty, random10]), random10);
+assert.deepStrictEqual(Buffer.concat([random10, empty, empty]), random10);
+
+// The tail should be zero-filled
+assert.deepStrictEqual(Buffer.concat([empty], 100), Buffer.alloc(100));
+assert.deepStrictEqual(Buffer.concat([empty], 4096), Buffer.alloc(4096));
+assert.deepStrictEqual(
+  Buffer.concat([random10], 40),
+  Buffer.concat([random10, Buffer.alloc(30)]));
+
+assert.deepStrictEqual(Buffer.concat([new Uint8Array([0x41, 0x42]),
+                                      new Uint8Array([0x43, 0x44])]),
+                       Buffer.from('ABCD'));