node/test/parallel/test-stream-transform-const...

44 lines
795 B
JavaScript

'use strict';
const common = require('../common');
const assert = require('assert');
const { Transform } = require('stream');
const t = new Transform();
assert.throws(
() => {
t.end(Buffer.from('blerg'));
},
{
name: 'Error',
code: 'ERR_METHOD_NOT_IMPLEMENTED',
message: 'The _transform() method is not implemented'
}
);
const _transform = common.mustCall((chunk, _, next) => {
next();
});
const _final = common.mustCall((next) => {
next();
});
const _flush = common.mustCall((next) => {
next();
});
const t2 = new Transform({
transform: _transform,
flush: _flush,
final: _final
});
assert.strictEqual(t2._transform, _transform);
assert.strictEqual(t2._flush, _flush);
assert.strictEqual(t2._final, _final);
t2.end(Buffer.from('blerg'));
t2.resume();