public void SparseArray()
{
EcmaArray arr = new EcmaArray();
// create new chunks
arr[1] = 1;
arr[4] = 4;
That(arr.ToValue(), Is.EquivalentTo(new[] { Undefined, 1, Undefined, Undefined, 4 }));
That(!arr.HasProperty(0));
That(!arr.HasProperty(2));
That(!arr.HasProperty(3));
// add item at the end of a chunk
arr[5] = 5;
That(arr.ToValue(), Is.EquivalentTo(new[] { Undefined, 1, Undefined, Undefined, 4, 5 }));
That(arr.HasProperty(5));
// add item at the beginning of a chunk
arr[3] = 3;
That(arr.ToValue(), Is.EquivalentTo(new[] { Undefined, 1, Undefined, 3, 4, 5 }));
That(arr.HasProperty(3));
// merge chunks
arr[2] = 2;
That(arr.ToValue(), Is.EquivalentTo(new[] { Undefined, 1, 2, 3, 4, 5 }));
That(arr.HasProperty(2));
// become a non-chunked array
arr[0] = 0;
That(arr.ToValue(), Is.EquivalentTo(new[] { 0, 1, 2, 3, 4, 5 }));
That(arr.HasProperty(0));
// becoma a chunked array
arr.Delete(1);
That(arr.ToValue(), Is.EquivalentTo(new[] { 0, Undefined, 2, 3, 4, 5 }));
That(!arr.HasProperty(1));
// delete item at the beginning of a chunk
arr.Delete(2);
That(arr.ToValue(), Is.EquivalentTo(new[] { 0, Undefined, Undefined, 3, 4, 5 }));
That(!arr.HasProperty(2));
// delete item at the end of a chunk
arr.Delete(5);
That(arr.ToValue(), Is.EquivalentTo(new[] { 0, Undefined, Undefined, 3, 4, Undefined }));
That(!arr.HasProperty(5));
// remove chunk
arr.Delete(0);
That(arr.ToValue(), Is.EquivalentTo(new[] { Undefined, Undefined, Undefined, 3, 4, Undefined }));
That(!arr.HasProperty(0));
// no chunk should be created
arr = new EcmaArray();
arr[0] = 0;
That(arr.ToValue(), Is.EquivalentTo(new[] { 0 }));
arr.Delete(0);
That(arr.ToValue(), Is.EquivalentTo(new[] { Undefined }));
arr = new EcmaArray(5);
arr[0] = 0;
arr[4] = 4;
}
public void SetLength()
{
EcmaArray arr = new EcmaArray();
Assume.That(arr.Length, Is.EqualTo(0));
arr.Length = 3;
That(arr.ToValue(), Is.EquivalentTo(new[] { Undefined, Undefined, Undefined }));
That(!arr.HasProperty(0));
That(!arr.HasProperty(1));
That(!arr.HasProperty(2));
// should delete properties whose name is an array index and is larger than new length
arr = new EcmaArray(1, 2, 3);
arr.Length = 2;
That(arr.ToValue(), Is.EquivalentTo(new[] { 1, 2 }));
That(!arr.HasProperty(2));
// should have changed if a property is added whose name is an array index
arr = new EcmaArray();
Assume.That(arr.Length, Is.EqualTo(0));
arr[0] = 1;
That(arr.ToValue(), Is.EquivalentTo(new[] { 1 }));
arr[1] = 2;
That(arr.ToValue(), Is.EquivalentTo(new[] { 1, 2 }));
arr = new EcmaArray();
arr[-1] = 1;
That(arr.Length, Is.EqualTo(0));
arr[true] = 1;
That(arr.Length, Is.EqualTo(0));
arr[CreateObject(valueOf: () => 3)] = 1;
That(arr.Length, Is.EqualTo(0));
arr["1"] = 1;
That(arr.Length, Is.EqualTo(2));
arr[Number.Construct(2)] = 2;
That(arr.Length, Is.EqualTo(3));
arr[String.Construct("3")] = 2;
That(arr.Length, Is.EqualTo(4));
arr[4294967294] = 4294967294;
That(arr.Length, Is.EqualTo(4294967295));
arr[4294967295] = 4294967295;
That(arr.Length, Is.EqualTo(4294967295));
arr = new EcmaArray();
That(() => arr["length"] = -1, Throws.RangeError);
That(() => arr["length"] = 4294967295, Throws.Nothing);
That(() => arr["length"] = 4294967296, Throws.RangeError);
That(() => arr["length"] = 4294967297, Throws.RangeError);
That(() => arr["length"] = 1.5, Throws.RangeError);
That(() => arr["length"] = NaN, Throws.RangeError);
That(() => arr["length"] = Infinity, Throws.RangeError);
That(() => arr["length"] = -Infinity, Throws.RangeError);
That(() => arr["length"] = Undefined, Throws.RangeError);
arr["length"] = true;
That(arr.Length, Is.EqualTo(1));
arr["length"] = Null;
That(arr.Length, Is.EqualTo(0));
arr["length"] = Boolean.Construct(false);
That(arr.Length, Is.EqualTo(0));
arr["length"] = Number.Construct(1);
That(arr.Length, Is.EqualTo(1));
arr["length"] = "1";
That(arr.Length, Is.EqualTo(1));
arr["length"] = String.Construct("1");
That(arr.Length, Is.EqualTo(1));
arr["length"] = CreateObject(valueOf: () => 2);
That(arr.Length, Is.EqualTo(2));
arr["length"] = CreateObject(valueOf: () => 2, toString: () => 1);
That(arr.Length, Is.EqualTo(2));
arr["length"] = CreateObject(valueOf: () => 2, toString: () => new EcmaObject());
That(arr.Length, Is.EqualTo(2));
arr["length"] = CreateObject(valueOf: () => 2, toString: ThrowTest262Exception);
That(arr.Length, Is.EqualTo(2));
arr["length"] = CreateObject(toString: () => 1);
That(arr.Length, Is.EqualTo(1));
arr["length"] = CreateObject(toString: () => 1, valueOf: () => new EcmaObject());
That(arr.Length, Is.EqualTo(1));
That(() => arr["length"] = CreateObject(valueOf: ThrowTest262Exception, toString: () => 1), Throws.Test262);
That(() => arr["length"] = CreateObject(valueOf: () => new EcmaObject(), toString: () => new EcmaObject()), Throws.TypeError);
}