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test: apply promises API to third appendFile test
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Add tests for `fs.promises.appendFile()` to the third (of five) test
case in `test-fs-access`. (First and second test cases already have
promises API versions.)

PR-URL: #21131
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
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Trott authored and targos committed Jun 13, 2018
1 parent cbdc1fd commit 185b9e4
Showing 1 changed file with 28 additions and 15 deletions.
43 changes: 28 additions & 15 deletions test/parallel/test-fs-append-file.js
Original file line number Diff line number Diff line change
Expand Up @@ -100,23 +100,37 @@ const throwNextTick = (e) => { process.nextTick(() => { throw e; }); };
.catch(throwNextTick);
}

// test that appendFile accepts buffers
const filename3 = join(tmpdir.path, 'append3.txt');
fs.writeFileSync(filename3, currentFileData);
// test that appendFile accepts buffers (callback API)
{
const filename = join(tmpdir.path, 'append-buffer.txt');
fs.writeFileSync(filename, currentFileData);

const buf = Buffer.from(s, 'utf8');
const buf = Buffer.from(s, 'utf8');

fs.appendFile(filename3, buf, function(e) {
assert.ifError(e);
fs.appendFile(filename, buf, common.mustCall((e) => {
assert.ifError(e);

ncallbacks++;
fs.readFile(filename, common.mustCall((e, buffer) => {
assert.ifError(e);
assert.strictEqual(buf.length + currentFileData.length, buffer.length);
}));
}));
}

fs.readFile(filename3, function(e, buffer) {
assert.ifError(e);
ncallbacks++;
assert.strictEqual(buf.length + currentFileData.length, buffer.length);
});
});
// test that appendFile accepts buffers (promises API)
{
const filename = join(tmpdir.path, 'append-buffer-promises.txt');
fs.writeFileSync(filename, currentFileData);

const buf = Buffer.from(s, 'utf8');

fs.promises.appendFile(filename, buf)
.then(common.mustCall(() => fs.promises.readFile(filename)))
.then((buffer) => {
assert.strictEqual(buf.length + currentFileData.length, buffer.length);
})
.catch(throwNextTick);
}

// test that appendFile accepts numbers.
const filename4 = join(tmpdir.path, 'append4.txt');
Expand Down Expand Up @@ -177,9 +191,8 @@ assert.throws(
{ code: 'ERR_INVALID_CALLBACK' });

process.on('exit', function() {
assert.strictEqual(ncallbacks, 8);
assert.strictEqual(ncallbacks, 6);

fs.unlinkSync(filename3);
fs.unlinkSync(filename4);
fs.unlinkSync(filename5);
});

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