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55 lines
2.1 KiB
55 lines
2.1 KiB
// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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'use strict';
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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 path = require('path');
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common.refreshTmpDir();
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const filepath = path.join(common.tmpDir, 'large.txt');
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const fd = fs.openSync(filepath, 'w+');
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const offset = 5 * 1024 * 1024 * 1024; // 5GB
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const message = 'Large File';
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fs.truncateSync(fd, offset);
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assert.strictEqual(fs.statSync(filepath).size, offset);
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var writeBuf = Buffer.from(message);
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fs.writeSync(fd, writeBuf, 0, writeBuf.length, offset);
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var readBuf = Buffer.allocUnsafe(writeBuf.length);
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fs.readSync(fd, readBuf, 0, readBuf.length, offset);
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assert.strictEqual(readBuf.toString(), message);
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fs.readSync(fd, readBuf, 0, 1, 0);
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assert.strictEqual(readBuf[0], 0);
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assert.doesNotThrow(
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() => { fs.writeSync(fd, writeBuf, 0, writeBuf.length, 42.000001); }
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);
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fs.close(fd);
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// Normally, we don't clean up tmp files at the end of a test, but we'll make an
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// exception for a 5 GB file.
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process.on('exit', function() {
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fs.unlinkSync(filepath);
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});
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