public async Task SingletonValueAsync_CallingOnlyOnce_Integer()
{
var counter = 0;
var singleValue = new SingletonValueAsync <int>(async() => { counter++; return(await Task.FromResult(counter - 1)); });
var a = await singleValue;
var b = await singleValue;
Assert.Equal(1, counter);
Assert.Equal(0, a);
Assert.Equal(0, b);
}
public async Task SingletonValueAsync_CallingOnlyOnce_String()
{
var counter = 0;
var singleValue = new SingletonValueAsync <string>(async() => { counter++; return(await Task.FromResult("test" + counter)); });
var a = await singleValue;
var b = await singleValue;
Assert.Equal(1, counter);
Assert.Equal("test1", a);
Assert.Equal("test1", b);
}