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'use strict';
const common = require('../common');
const assert = require('assert');
const stream = require('stream');
const writable = new stream.Writable();
writable._writev = common.mustCall((chunks, cb) => {
assert.strictEqual(chunks.length, 2);
cb();
}, 1);
writable._write = common.mustCall((chunk, encoding, cb) => {
cb();
}, 1);
// first cork
writable.cork();
assert.strictEqual(writable._writableState.corked, 1);
assert.strictEqual(writable._writableState.bufferedRequestCount, 0);
// cork again
writable.cork();
assert.strictEqual(writable._writableState.corked, 2);
// The first chunk is buffered
writable.write('first chunk');
assert.strictEqual(writable._writableState.bufferedRequestCount, 1);
// First uncork does nothing
writable.uncork();
assert.strictEqual(writable._writableState.corked, 1);
assert.strictEqual(writable._writableState.bufferedRequestCount, 1);
process.nextTick(uncork);
// The second chunk is buffered, because we uncork at the end of tick
writable.write('second chunk');
assert.strictEqual(writable._writableState.corked, 1);
assert.strictEqual(writable._writableState.bufferedRequestCount, 2);
function uncork() {
// Second uncork flushes the buffer
writable.uncork();
assert.strictEqual(writable._writableState.corked, 0);
assert.strictEqual(writable._writableState.bufferedRequestCount, 0);
// Verify that end() uncorks correctly
writable.cork();
writable.write('third chunk');
writable.end();
// End causes an uncork() as well
assert.strictEqual(writable._writableState.corked, 0);
assert.strictEqual(writable._writableState.bufferedRequestCount, 0);
}
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