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'use strict';
require('../common');
const assert = require('assert');
const stream = require('stream');
const writable = new stream.Writable();
function testStates(ending, finished, ended) {
assert.strictEqual(writable._writableState.ending, ending);
assert.strictEqual(writable._writableState.finished, finished);
assert.strictEqual(writable._writableState.ended, ended);
}
writable._write = (chunk, encoding, cb) => {
// Ending, finished, ended start in false.
testStates(false, false, false);
cb();
};
writable.on('finish', () => {
// Ending, finished, ended = true.
testStates(true, true, true);
});
const result = writable.end('testing function end()', () => {
// Ending, finished, ended = true.
testStates(true, true, true);
});
// End returns the writable instance
assert.strictEqual(result, writable);
// Ending, ended = true.
// finished = false.
testStates(true, false, true);