load(libdir + "asserts.js");
load(libdir + "eqArrayHelper.js");

function f1(a, bIs, [b]=[3], ...rest) {
    assertEq(a, 1);
    assertEq(bIs, b);
    assertEqArray(rest, []);
}
assertEq(f1.length, 2);
f1(1, 3);
f1(1, 42, [42]);

function f2([a]=[rest], ...rest) {
    assertEq(a, undefined);
}
f2();

function f3([a]=[rest], ...rest) {
    assertEq(a, 1);
    assertEqArray(rest, [2, 3, 4]);
}
f3([1], 2, 3, 4);

function f4([a]=rest, ...rest) {
}
assertThrowsInstanceOf(f4, TypeError);