public void ShouldBeAnArray()
{
var value = new ArrayInstance(_engine);
Assert.Equal(false, value.IsBoolean());
Assert.Equal(true, value.IsArray());
Assert.Equal(false, value.IsDate());
Assert.Equal(false, value.IsNull());
Assert.Equal(false, value.IsNumber());
Assert.Equal(true, value.IsObject());
Assert.Equal(false, value.IsPrimitive());
Assert.Equal(false, value.IsRegExp());
Assert.Equal(false, value.IsString());
Assert.Equal(false, value.IsUndefined());
Assert.Equal(true, value.AsArray() != null);
}