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test: add internal/fs tests

PR-URL: #12306
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
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DavidCai1993 authored and addaleax committed Apr 11, 2017
1 parent b07c72b commit f98db78f7756b29bd0e92c469a7fb7425f1267af
Showing with 76 additions and 0 deletions.
  1. +66 −0 test/parallel/test-internal-fs-syncwritestream.js
  2. +10 −0 test/parallel/test-internal-fs.js
@@ -0,0 +1,66 @@
// Flags: --expose-internals
'use strict';

const common = require('../common');
const assert = require('assert');
const fs = require('fs');
const path = require('path');
const SyncWriteStream = require('internal/fs').SyncWriteStream;

common.refreshTmpDir();

const filename = path.join(common.tmpDir, 'sync-write-stream.txt');

// Verify constructing the instance with defualt options.
{
const stream = new SyncWriteStream(1);

assert.strictEqual(stream.fd, 1);
assert.strictEqual(stream.readable, false);
assert.strictEqual(stream.autoClose, true);
assert.strictEqual(stream.listenerCount('end'), 1);
}

// Verify constructing the instance with specified options.
{
const stream = new SyncWriteStream(1, { autoClose: false });

assert.strictEqual(stream.fd, 1);
assert.strictEqual(stream.readable, false);
assert.strictEqual(stream.autoClose, false);
assert.strictEqual(stream.listenerCount('end'), 1);
}

// Verfiy that the file will be writen synchronously.
{
const fd = fs.openSync(filename, 'w');
const stream = new SyncWriteStream(fd);
const chunk = Buffer.from('foo');

assert.strictEqual(stream._write(chunk, null, common.mustCall(1)), true);
assert.strictEqual(fs.readFileSync(filename).equals(chunk), true);
}

// Verify that the stream will unset the fd after destory().
{
const fd = fs.openSync(filename, 'w');
const stream = new SyncWriteStream(fd);

stream.on('close', common.mustCall(3));

assert.strictEqual(stream.destroy(), true);
assert.strictEqual(stream.fd, null);
assert.strictEqual(stream.destroy(), true);
assert.strictEqual(stream.destroySoon(), true);
}

// Verfit that the 'end' event listener will also destroy the stream.
{
const fd = fs.openSync(filename, 'w');
const stream = new SyncWriteStream(fd);

assert.strictEqual(stream.fd, fd);

stream.emit('end');
assert.strictEqual(stream.fd, null);
}
@@ -0,0 +1,10 @@
// Flags: --expose-internals
'use strict';

require('../common');
const assert = require('assert');
const fs = require('internal/fs');

assert.doesNotThrow(() => fs.assertEncoding());
assert.doesNotThrow(() => fs.assertEncoding('utf8'));
assert.throws(() => fs.assertEncoding('foo'), /^Error: Unknown encoding: foo$/);

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