// META: global=window,worker

'use strict';

test(t => {
  assert_throws_js(TypeError, () => new CompressionStream('a'), 'constructor should throw');
}, '"a" should cause the constructor to throw');

test(t => {
  assert_throws_js(TypeError, () => new CompressionStream(), 'constructor should throw');
}, 'no input should cause the constructor to throw');

test(t => {
  assert_throws_js(Error, () => new CompressionStream({ toString() { throw Error(); } }), 'constructor should throw');
}, 'non-string input should cause the constructor to throw');