public void lazy_should_invoke_only_once()
{
var numberOfInvocations = 0;
var lazyHeavyClass = new Lazy <HeavyClass>(() =>
{
numberOfInvocations++;
return(new HeavyClass());
});
var sut = new LightClassWithLazy(lazyHeavyClass);
sut.SomeMethod();
sut.SomeMethod();
sut.SomeMethod();
numberOfInvocations.Should().Be(1);
}
public void should_defer_the_creation_using_Lazy()
{
var created = false;
var lazyHeavyClass = new Lazy <HeavyClass>(() =>
{
created = true;
return(new HeavyClass());
});
var sut = new LightClassWithLazy(lazyHeavyClass);
created.Should().Be(false);
sut.SomeMethod();
created.Should().Be(true);
}