test_eventemitter_max_listeners.cjs
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test_eventemitter_max_listeners.cjs
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	const assert = require('node:assert');
	const events = require('node:events');
	const { EventEmitter } = events;
	const { PassThrough } = require('node:stream');

	const ee = new EventEmitter();
	assert.equal(typeof ee.once, 'function');
	assert.equal(typeof ee.prependListener, 'function');
	assert.equal(typeof ee.prependOnceListener, 'function');
	assert.equal(typeof ee.listenerCount, 'function');
	assert.equal(typeof ee.setMaxListeners, 'function');
	assert.equal(typeof ee.getMaxListeners, 'function');
	assert.equal(typeof ee.rawListeners, 'function');

	assert.equal(ee.getMaxListeners(), 10);
	assert.equal(ee.setMaxListeners(3), ee);
	assert.equal(ee.getMaxListeners(), 3);

	function a() {}
	function b() {}
	ee.on('x', a);
	ee.prependOnceListener('x', b);

	assert.equal(ee.listenerCount('x'), 2);
	const raw = ee.rawListeners('x');
	assert.equal(raw.length, 2);
	assert.notEqual(raw[0], b);
	assert.equal(raw[0].listener, b);
	assert.equal(raw[1], a);

	const pt = new PassThrough();
	assert.equal(typeof pt.setMaxListeners, 'function');
	assert.equal(typeof pt.getMaxListeners, 'function');
	assert.equal(typeof pt.once, 'function');
	assert.equal(typeof pt.prependListener, 'function');
	assert.equal(typeof pt.prependOnceListener, 'function');
	assert.equal(typeof pt.listenerCount, 'function');
	assert.equal(typeof pt.rawListeners, 'function');

	pt.setMaxListeners(30);
	assert.equal(pt.getMaxListeners(), 30);
	assert.equal(events.getMaxListeners(pt), 30);