public async ValueTask ElementAtAsync_SelectorAt_With_ValidData_Must_Return_Some(int[] source, NullableSelectorAt <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
var expected = Enumerable
.Select(source, selector.AsFunc())
.ToList();
for (var index = 0; index < source.Length; index++)
{
// Act
var result = await AsyncValueEnumerableExtensions
.Select <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int, string>(wrapped, selector.AsAsync())
.ElementAtAsync(index);
// Assert
_ = result.Match(
value => value.Must().BeEqualTo(expected[index]),
() => throw new Exception());
}
}
public void Select_Selector_With_ValidData_Must_Succeed(int[] source, NullableSelectorAt <int, string> selector)
{
// Arrange
var wrapped = Wrap.AsAsyncValueEnumerable(source);
var expected = System.Linq.Enumerable
.Select(source, selector.AsFunc());
// Act
var result = AsyncValueEnumerableExtensions
.Select <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int, string>(wrapped, selector.AsAsync());
// Assert
_ = result.Must()
.BeAsyncEnumerableOf <string>()
.BeEqualTo(expected);
}
public async void ElementAtAsync_SelectorAt_With_OutOfRange_Must_Return_None(int[] source, NullableSelectorAt <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
// Act
var optionNegative = await AsyncValueEnumerableExtensions
.Select <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int, string>(wrapped, selector.AsAsync())
.ElementAtAsync(-1);
var optionTooLarge = await AsyncValueEnumerableExtensions
.Select <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int, string>(wrapped, selector.AsAsync())
.ElementAtAsync(source.Length);
// Assert
_ = optionNegative.Must()
.BeOfType <Option <string> >()
.EvaluateTrue(option => option.IsNone);
_ = optionTooLarge.Must()
.BeOfType <Option <string> >()
.EvaluateTrue(option => option.IsNone);
}
public async ValueTask ToArrayAsync_SelectorAt_MemoryPool_Must_Succeed(int[] source, NullableSelectorAt <int, string> selector)
{
// Arrange
var pool = MemoryPool <string> .Shared;
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
var expected = Enumerable
.Select(source, selector.AsFunc())
.ToArray();
// Act
var result = await AsyncValueEnumerableExtensions
.Select <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int, string>(wrapped, selector.AsAsync())
.ToArrayAsync(pool);
// Assert
_ = result.Memory
.SequenceEqual(expected);
}
public async ValueTask ToArrayAsync_SelectorAt_With_ValidData_Must_Succeed(int[] source, NullableSelectorAt <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
var expected = Enumerable
.Select(source, selector.AsFunc())
.ToArray();
// Act
var result = await AsyncValueEnumerableExtensions
.Select <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int, string>(wrapped, selector.AsAsync())
.ToArrayAsync();
// Assert
_ = result.Must()
.BeArrayOf <string>()
.BeEqualTo(expected);
}
public async void FirstAsync_SelectorAt_With_Empty_Must_Return_None(int[] source, NullableSelectorAt <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
// Act
var result = await AsyncValueEnumerableExtensions
.Select <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int, string>(wrapped, selector.AsAsync())
.FirstAsync();
// Assert
_ = result.Must()
.BeOfType <Option <string> >()
.EvaluateTrue(option => option.IsNone);
}
public async ValueTask SingleAsync_SelectorAt_With_SingleAsync_Must_Return_Some(int[] source, NullableSelectorAt <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
var expected = Enumerable
.Select(source, selector.AsFunc())
.Single();
// Act
var result = await AsyncValueEnumerableExtensions
.Select <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int, string>(wrapped, selector.AsAsync())
.SingleAsync();
// Assert
_ = result.Match(
value => value.Must().BeEqualTo(expected),
() => throw new Exception());
}