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a1f590ebd6
PR-URL: https://github.com/nodejs/node/pull/38604 Refs: https://coverage.nodejs.org/coverage-29f1b609ba5d12d3/lib/fs.js.html#L2045 Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Darshan Sen <raisinten@gmail.com>
86 lines
2.4 KiB
JavaScript
86 lines
2.4 KiB
JavaScript
'use strict';
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// This test makes sure that `writeFile()` always writes from the current
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// position of the file, instead of truncating the file, when used with file
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// descriptors.
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const common = require('../common');
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const assert = require('assert');
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const fs = require('fs');
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const join = require('path').join;
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const tmpdir = require('../common/tmpdir');
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tmpdir.refresh();
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{
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/* writeFileSync() test. */
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const filename = join(tmpdir.path, 'test.txt');
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/* Open the file descriptor. */
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const fd = fs.openSync(filename, 'w');
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/* Write only five characters, so that the position moves to five. */
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assert.deepStrictEqual(fs.writeSync(fd, 'Hello'), 5);
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assert.deepStrictEqual(fs.readFileSync(filename).toString(), 'Hello');
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/* Write some more with writeFileSync(). */
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fs.writeFileSync(fd, 'World');
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/* New content should be written at position five, instead of zero. */
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assert.deepStrictEqual(fs.readFileSync(filename).toString(), 'HelloWorld');
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/* Close the file descriptor. */
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fs.closeSync(fd);
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}
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{
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/* writeFile() test. */
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const file = join(tmpdir.path, 'test1.txt');
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/* Open the file descriptor. */
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fs.open(file, 'w', common.mustSucceed((fd) => {
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/* Write only five characters, so that the position moves to five. */
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fs.write(fd, 'Hello', common.mustSucceed((bytes) => {
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assert.strictEqual(bytes, 5);
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assert.deepStrictEqual(fs.readFileSync(file).toString(), 'Hello');
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/* Write some more with writeFile(). */
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fs.writeFile(fd, 'World', common.mustSucceed(() => {
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/* New content should be written at position five, instead of zero. */
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assert.deepStrictEqual(fs.readFileSync(file).toString(), 'HelloWorld');
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/* Close the file descriptor. */
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fs.closeSync(fd);
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}));
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}));
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}));
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}
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// Test read-only file descriptor
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{
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// TODO(pd4d10): https://github.com/nodejs/node/issues/38607
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const expectedError = common.isWindows ? /EPERM/ : /EBADF/;
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const file = join(tmpdir.path, 'test.txt');
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fs.open(file, 'r', common.mustSucceed((fd) => {
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fs.writeFile(fd, 'World', common.expectsError(expectedError));
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}));
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}
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// Test with an AbortSignal
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{
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const controller = new AbortController();
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const signal = controller.signal;
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const file = join(tmpdir.path, 'test.txt');
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fs.open(file, 'w', common.mustSucceed((fd) => {
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fs.writeFile(fd, 'World', { signal }, common.expectsError({
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name: 'AbortError'
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}));
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}));
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controller.abort();
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}
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