public void TestAtomicDouble()
{
var d = AtomicDouble.From(0.1);
Assert.Equal(0.1, d.Value);
Assert.True(d.CompareExchange(0.2, 0.1));
Assert.Equal(0.2, d.Value);
Assert.True(d.Exchange(0.3));
Assert.Equal(0.3, d.Value);
Assert.Equal(0.3, d);
}