test: add promise API test for appendFile()
Apply the second of five test cases in test-fs-append-fil to the promise-based API in addition to the callback-based API. PR-URL: https://github.com/nodejs/node/pull/20842 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
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@ -70,22 +70,35 @@ const throwNextTick = (e) => { process.nextTick(() => { throw e; }); };
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.catch(throwNextTick);
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}
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// test that appends data to a non empty file
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const filename2 = join(tmpdir.path, 'append2.txt');
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fs.writeFileSync(filename2, currentFileData);
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// test that appends data to a non-empty file (callback API)
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{
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const filename = join(tmpdir.path, 'append-non-empty.txt');
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fs.writeFileSync(filename, currentFileData);
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fs.appendFile(filename2, s, function(e) {
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assert.ifError(e);
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ncallbacks++;
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fs.readFile(filename2, function(e, buffer) {
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fs.appendFile(filename, s, common.mustCall(function(e) {
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assert.ifError(e);
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ncallbacks++;
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assert.strictEqual(Buffer.byteLength(s) + currentFileData.length,
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buffer.length);
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});
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});
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fs.readFile(filename, common.mustCall(function(e, buffer) {
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assert.ifError(e);
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assert.strictEqual(Buffer.byteLength(s) + currentFileData.length,
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buffer.length);
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}));
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}));
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}
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// test that appends data to a non-empty file (promise API)
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{
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const filename = join(tmpdir.path, 'append-non-empty-promise.txt');
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fs.writeFileSync(filename, currentFileData);
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fs.promises.appendFile(filename, s)
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.then(common.mustCall(() => fs.promises.readFile(filename)))
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.then((buffer) => {
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assert.strictEqual(Buffer.byteLength(s) + currentFileData.length,
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buffer.length);
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})
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.catch(throwNextTick);
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}
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// test that appendFile accepts buffers
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const filename3 = join(tmpdir.path, 'append3.txt');
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@ -164,9 +177,8 @@ assert.throws(
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{ code: 'ERR_INVALID_CALLBACK' });
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process.on('exit', function() {
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assert.strictEqual(10, ncallbacks);
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assert.strictEqual(ncallbacks, 8);
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fs.unlinkSync(filename2);
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fs.unlinkSync(filename3);
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fs.unlinkSync(filename4);
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fs.unlinkSync(filename5);
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