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

load("test-common.js");

try {
    assert(Array.prototype.splice.length === 2);

    var array = ["hello", "friends", "serenity", 1, 2];
    var removed = array.splice(3);
    assert(array.length === 3);
    assert(array[0] === "hello");
    assert(array[1] === "friends");
    assert(array[2] === "serenity");
    assert(removed.length === 2);
    assert(removed[0] === 1);
    assert(removed[1] === 2);

    array = ["hello", "friends", "serenity", 1, 2];
    removed = array.splice(-2);
    assert(array.length === 3);
    assert(array[0] === "hello");
    assert(array[1] === "friends");
    assert(array[2] === "serenity");
    assert(removed.length === 2);
    assert(removed[0] === 1);
    assert(removed[1] === 2);

    array = ["hello", "friends", "serenity", 1, 2];
    removed = array.splice(-2, 1);
    assert(array.length === 4);
    assert(array[0] === "hello");
    assert(array[1] === "friends");
    assert(array[2] === "serenity");
    assert(array[3] === 2);
    assert(removed.length === 1);
    assert(removed[0] === 1);

    array = ["serenity"];
    removed = array.splice(0, 0, "hello", "friends");
    assert(array.length === 3);
    assert(array[0] === "hello");
    assert(array[1] === "friends");
    assert(array[2] === "serenity");
    assert(removed.length === 0);

    array = ["goodbye", "friends", "serenity"];
    removed = array.splice(0, 1, "hello");
    assert(array.length === 3);
    assert(array[0] === "hello");
    assert(array[1] === "friends");
    assert(array[2] === "serenity");
    assert(removed.length === 1);
    assert(removed[0] === "goodbye");

    array = ["foo", "bar", "baz"];
    removed = array.splice();
    assert(array.length === 3);
    assert(array[0] === "foo");
    assert(array[1] === "bar");
    assert(array[2] === "baz");
    assert(removed.length === 0);

    removed = array.splice(0, 123);
    assert(array.length === 0);
    assert(removed.length === 3);
    assert(removed[0] === "foo");
    assert(removed[1] === "bar");
    assert(removed[2] === "baz");

    array = ["foo", "bar", "baz"];
    removed = array.splice(123, 123);
    assert(array.length === 3);
    assert(array[0] === "foo");
    assert(array[1] === "bar");
    assert(array[2] === "baz");
    assert(removed.length === 0);

    array = ["foo", "bar", "baz"];
    removed = array.splice(-123, 123);
    assert(array.length === 0);
    assert(removed.length === 3);
    assert(removed[0] === "foo");
    assert(removed[1] === "bar");
    assert(removed[2] === "baz");

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