ladybird/Libraries/LibJS/Tests/Array.prototype.shift.js

load("test-common.js");

try {
    var a = [1, 2, 3];
    var value = a.shift();
    assert(value === 1);
    assert(a.length === 2);
    assert(a[0] === 2);
    assert(a[1] === 3);

    var a = [];
    var value = a.shift();
    assert(value === undefined);
    assert(a.length === 0);

    assert([,].shift() === undefined);

    console.log("PASS");
} catch (e) {
    console.log("FAIL: " + e);
}