test(function() {
    var params = new URLSearchParams('a=b&c=d');
    assert_array_equals(params.getAll('a'), ['b']);
    assert_array_equals(params.getAll('c'), ['d']);
    assert_array_equals(params.getAll('e'), []);
    params = new URLSearchParams('a=b&c=d&a=e');
    assert_array_equals(params.getAll('a'), ['b', 'e']);
    params = new URLSearchParams('=b&c=d');
    assert_array_equals(params.getAll(''), ['b']);
    params = new URLSearchParams('a=&c=d&a=e');
    assert_array_equals(params.getAll('a'), ['', 'e']);
}, 'getAll() basics');

test(function() {
    var params = new URLSearchParams('a=1&a=2&a=3&a');
    assert_true(params.has('a'), 'Search params object has name "a"');
    var matches = params.getAll('a');
    assert_true(matches && matches.length == 4, 'Search params object has values for name "a"');
    assert_array_equals(matches, ['1', '2', '3', ''], 'Search params object has expected name "a" values');
    params.set('a', 'one');
    assert_equals(params.get('a'), 'one', 'Search params object has name "a" with value "one"');
    var matches = params.getAll('a');
    assert_true(matches && matches.length == 1, 'Search params object has values for name "a"');
    assert_array_equals(matches, ['one'], 'Search params object has expected name "a" values');
}, 'getAll() multiples');