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test: update comments in test-fs-read-offset-null #36152

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Nov 21, 2020
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test: update comments in test-fs-read-offset-null #36152

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9 changes: 4 additions & 5 deletions test/parallel/test-fs-read-offset-null.js
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Original file line number Diff line number Diff line change
Expand Up @@ -12,17 +12,16 @@ const fixtures = require('../common/fixtures');
const filepath = fixtures.path('x.txt');

const buf = Buffer.alloc(1);
// Reading only one character, hence buffer of one byte is enough
// Reading only one character, hence buffer of one byte is enough.

// Test for callback api
// Test for callback API.
fs.open(filepath, 'r', common.mustSucceed((fd) => {
fs.read(fd, { offset: null, buffer: buf },
common.mustSucceed((bytesRead, buffer) => {
assert.strictEqual(buffer[0], 120);
// Test is done by making sure the first letter in buffer is
// same as first letter in file.
// 66 is the hex for ascii code of letter B

// 120 is the hex for ascii code of letter x.
assert.strictEqual(buffer[0], 120);
fs.close(fd, common.mustSucceed(() => {}));
}));
}));
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