test: add tests for fs/promises.js fileHandle methods

Working to increase test code coverage for fs/promises.js.
Added tests for fileHandle.appendFile and fileHandle.chmod.

PR-URL: https://github.com/nodejs/node/pull/19605
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/test/parallel/test-fs-promises-file-handle-read.js b/test/parallel/test-fs-promises-file-handle-read.js
new file mode 100644
index 0000000000..5a9bc4558c
--- /dev/null
+++ b/test/parallel/test-fs-promises-file-handle-read.js
@@ -0,0 +1,45 @@
+'use strict';
+
+const common = require('../common');
+
+// The following tests validate base functionality for the fs/promises
+// FileHandle.read method.
+
+const fs = require('fs');
+const { open } = require('fs/promises');
+const path = require('path');
+const tmpdir = require('../common/tmpdir');
+const assert = require('assert');
+const tmpDir = tmpdir.path;
+
+tmpdir.refresh();
+common.crashOnUnhandledRejection();
+
+async function validateRead() {
+  const filePath = path.resolve(tmpDir, 'tmp-read-file.txt');
+  const fileHandle = await open(filePath, 'w+');
+  const buffer = Buffer.from('Hello world', 'utf8');
+
+  const fd = fs.openSync(filePath, 'w+');
+  fs.writeSync(fd, buffer, 0, buffer.length);
+  fs.closeSync(fd);
+  const readAsyncHandle = await fileHandle.read(Buffer.alloc(11), 0, 11, 0);
+  assert.deepStrictEqual(buffer.length, readAsyncHandle.bytesRead);
+  assert.deepStrictEqual(buffer, readAsyncHandle.buffer);
+}
+
+async function validateEmptyRead() {
+  const filePath = path.resolve(tmpDir, 'tmp-read-empty-file.txt');
+  const fileHandle = await open(filePath, 'w+');
+  const buffer = Buffer.from('', 'utf8');
+
+  const fd = fs.openSync(filePath, 'w+');
+  fs.writeSync(fd, buffer, 0, buffer.length);
+  fs.closeSync(fd);
+  const readAsyncHandle = await fileHandle.read(Buffer.alloc(11), 0, 11, 0);
+  assert.deepStrictEqual(buffer.length, readAsyncHandle.bytesRead);
+}
+
+validateRead()
+  .then(validateEmptyRead)
+  .then(common.mustCall());