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'use strict'; const common = require('../common'); const fs = require('fs'); const assert = require('assert'); const path = require('path'); const tmpdir = require('../common/tmpdir'); const file = path.join(tmpdir.path, 'read_stream_filehandle_test.txt'); const input = 'hello world'; tmpdir.refresh(); fs.writeFileSync(file, input); fs.promises.open(file, 'r').then((handle) => { handle.on('close', common.mustCall()); const stream = fs.createReadStream(null, { fd: handle }); let output = ''; stream.on('data', common.mustCallAtLeast((data) => { output += data; })); stream.on('end', common.mustCall(() => { assert.strictEqual(output, input); })); stream.on('close', common.mustCall()); }).then(common.mustCall()); fs.promises.open(file, 'r').then((handle) => { handle.on('close', common.mustCall()); const stream = fs.createReadStream(null, { fd: handle }); stream.on('data', common.mustNotCall()); stream.on('close', common.mustCall()); return handle.close(); }).then(common.mustCall()); fs.promises.open(file, 'r').then((handle) => { handle.on('close', common.mustCall()); const stream = fs.createReadStream(null, { fd: handle }); stream.on('close', common.mustCall()); stream.on('data', common.mustCall(() => { handle.close(); })); }).then(common.mustCall()); fs.promises.open(file, 'r').then((handle) => { handle.on('close', common.mustCall()); const stream = fs.createReadStream(null, { fd: handle }); stream.on('close', common.mustCall()); stream.close(); }).then(common.mustCall()); fs.promises.open(file, 'r').then((handle) => { assert.throws(() => { fs.createReadStream(null, { fd: handle, fs }); }, { code: 'ERR_METHOD_NOT_IMPLEMENTED', name: 'Error', message: 'The FileHandle with fs method is not implemented' }); return handle.close(); }).then(common.mustCall()); fs.promises.open(file, 'r').then((handle) => { const { read: originalReadFunction } = handle; handle.read = common.mustCallAtLeast(function read() { return Reflect.apply(originalReadFunction, this, arguments); }); const stream = fs.createReadStream(null, { fd: handle }); let output = ''; stream.on('data', common.mustCallAtLeast((data) => { output += data; })); stream.on('end', common.mustCall(() => { assert.strictEqual(output, input); })); }).then(common.mustCall());