38   const file = fs.createReadStream(fn, options);
41   assert.strictEqual(file.bytesRead, 0);
43   file.on('open', common.mustCall(function(fd) {
44     file.length = 0;
46     assert.strictEqual(file.bytesRead, 0);
47     assert.ok(file.readable);
50     file.pause();
51     file.resume();
52     file.pause();
53     file.resume();
56   file.on('data', function(data) {
60     file.length += data.length;
63     assert.strictEqual(file.bytesRead, bytesRead);
66     file.pause();
70       file.resume();
75   file.on('end', common.mustCall(function(chunk) {
77     assert.strictEqual(file.bytesRead, fileSize);
81   file.on('close', common.mustCall(function() {
83     assert.strictEqual(file.bytesRead, fileSize);
87     assert.strictEqual(file.length, 30000);
101   const file = fs.createReadStream(fn, { encoding: 'utf8' });  constant
102   file.length = 0;
103   file.on('data', function(data) {
105     file.length += data.length;
113   file.on('close', common.mustCall());
116     assert.strictEqual(file.length, 10000);
121   const file =  constant
124   file.on('data', function(data) {
127   file.on('end', common.mustCall(function(data) {
133   const file = fs.createReadStream(rangeFile, { bufferSize: 1, start: 1 });  constant
134   file.data = '';
135   file.on('data', function(data) {
136     file.data += data.toString('utf-8');
138   file.on('end', common.mustCall(function() {
139     assert.strictEqual(file.data, 'yz\n');
145   const file = fs.createReadStream(rangeFile, { bufferSize: 1.23, start: 1 });  constant
146   file.data = '';
147   file.on('data', function(data) {
148     file.data += data.toString('utf-8');
150   file.on('end', common.mustCall(function() {
151     assert.strictEqual(file.data, 'yz\n');
226   let file = fs.createReadStream(rangeFile, { autoClose: false });  variable
228   file.on('data', function(chunk) { data += chunk; });
229   file.on('end', common.mustCall(function() {
232       assert(!file.closed);
233       assert(!file.destroyed);
240     file = fs.createReadStream(null, { fd: file.fd, start: 0 });
241     file.data = '';
242     file.on('data', function(data) {
243       file.data += data;
245     file.on('end', common.mustCall(function(err) {
246       assert.strictEqual(file.data, 'xyz\n');
249       assert(file.closed);
250       assert(file.destroyed);
257   const file = fs.createReadStream(null, { fd: 13337, autoClose: false });
258   file.on('data', common.mustNotCall());
259   file.on('error', common.mustCall());
261     assert(!file.closed);
262     assert(!file.destroyed);
263     assert(file.fd);
269   const file = fs.createReadStream('/path/to/file/that/does/not/exist');
270   file.on('data', common.mustNotCall());
271   file.on('error', common.mustCall());
274     assert(!file.closed);
275     assert(file.destroyed);