public async void ElementAtAsync_Predicate_Selector_With_OutOfRange_Must_Return_None(int[] source, Predicate <int> predicate, NullableSelector <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
// Act
var optionNegative = await AsyncValueEnumerableExtensions
.Where <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int>(wrapped, predicate.AsAsync())
.Select(selector.AsAsync())
.ElementAtAsync(-1);
var optionTooLarge = await AsyncValueEnumerableExtensions
.Where <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int>(wrapped, predicate.AsAsync())
.Select(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 void Where_Predicate_With_Null_Must_Throw()
{
// Arrange
var enumerable = Wrap.AsAsyncValueEnumerable(new int[0]);
var predicate = (AsyncPredicateAt <int>)null;
// Act
Action action = () => _ = AsyncValueEnumerableExtensions
.Where <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int>(enumerable, predicate);
// Assert
_ = action.Must()
.Throw <ArgumentNullException>()
.EvaluateTrue(exception => exception.ParamName == "predicate");
}
public void WhereSelect_Selector_With_Null_Must_Throw()
{
// Arrange
var enumerable = Wrap.AsAsyncValueEnumerable(new int[0]);
var selector = (AsyncSelector <int, string>)null;
// Act
Action action = () => _ = AsyncValueEnumerableExtensions
.Where <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int>(enumerable, (_, __) => new ValueTask <bool>(true))
.Select(selector);
// Assert
_ = action.Must()
.Throw <ArgumentNullException>()
.EvaluateTrue(exception => exception.ParamName == "selector");
}
public async void SingleAsync_Predicate_With_Empty_Must_Return_None(int[] source, Func <int, bool> predicate)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
// Act
var result = await AsyncValueEnumerableExtensions
.Where <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int>(wrapped, predicate.AsAsync())
.SingleAsync();
// Assert
_ = result.Must()
.BeOfType <Option <int> >()
.EvaluateTrue(option => option.IsNone);
}
public void Where_Predicate_With_ValidData_Must_Succeed(int[] source, Func <int, int, bool> predicate)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
var expected = Enumerable
.Where(source, predicate);
// Act
var result = AsyncValueEnumerableExtensions
.Where <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int>(wrapped, predicate.AsAsync());
// Assert
_ = result.Must()
.BeAsyncEnumerableOf <int>()
.BeEqualTo(expected);
}
public async void FirstAsync_Predicate_Selector_With_Empty_Must_Return_None(int[] source, Predicate <int> predicate, NullableSelector <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
// Act
var result = await AsyncValueEnumerableExtensions
.Where <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int>(wrapped, predicate.AsAsync())
.Select(selector.AsAsync())
.FirstAsync();
// Assert
_ = result.Must()
.BeOfType <Option <string> >()
.EvaluateTrue(option => option.IsNone);
}
public async ValueTask CountAsync_PredicateAt_With_ValidData_Must_Succeed(int[] source, PredicateAt <int> predicate)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
var expected = Enumerable.Where(source, predicate.AsFunc())
.Count();
// Act
var result = await AsyncValueEnumerableExtensions
.Where <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int>(wrapped, predicate.AsAsync())
.CountAsync();
// Assert
_ = result.Must()
.BeEqualTo(expected);
}
public void WhereSelect_Predicate_With_ValidData_Must_Succeed(int[] source, Predicate <int> predicate, NullableSelector <int, string> selector)
{
// Arrange
var wrapped = Wrap.AsAsyncValueEnumerable(source);
var expected =
System.Linq.Enumerable.Select(
System.Linq.Enumerable.Where(source, predicate.AsFunc()), selector.AsFunc());
// Act
var result = AsyncValueEnumerableExtensions
.Where <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int>(wrapped, predicate.AsAsync())
.Select(selector.AsAsync());
// Assert
_ = result.Must()
.BeAsyncEnumerableOf <string>()
.BeEqualTo(expected);
}
public async ValueTask SingleAsync_Predicate_With_SingleAsync_Must_Return_Some(int[] source, Func <int, bool> predicate)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
var expected = Enumerable
.Single(source, predicate);
// Act
var result = await AsyncValueEnumerableExtensions
.Where <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int>(wrapped, predicate.AsAsync())
.SingleAsync();
// Assert
_ = result.Match(
value => value.Must().BeEqualTo(expected),
() => throw new Exception());
}
public async ValueTask ToArrayAsync_Predicate_MemoryPool_Must_Succeed(int[] source, Func <int, bool> predicate)
{
// Arrange
var pool = MemoryPool <int> .Shared;
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
var expected = Enumerable
.Where(source, predicate)
.ToArray();
// Act
var result = await AsyncValueEnumerableExtensions
.Where <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int>(wrapped, predicate.AsAsync())
.ToArrayAsync(pool);
// Assert
_ = result.Memory
.SequenceEqual(expected);
}
public async ValueTask ElementAtAsync_PredicateAt_With_ValidData_Must_Return_Some(int[] source, PredicateAt <int> predicate)
{
// Arrange
var wrapped = Wrap.AsAsyncValueEnumerable(source);
var expected = Enumerable
.Where(source, predicate.AsFunc())
.ToList();
for (var index = 0; index < expected.Count; index++)
{
// Act
var result = await AsyncValueEnumerableExtensions
.Where <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int>(wrapped, predicate.AsAsync())
.ElementAtAsync(index);
// Assert
_ = result.Match(
value => value.Must().BeEqualTo(expected[index]),
() => throw new Exception());
}
}
public async ValueTask ToArrayAsync_Predicate_Selector_With_ValidData_Must_Succeed(int[] source, Func <int, bool> predicate, Func <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
var expected = Enumerable
.Where(source, predicate)
.Select(selector)
.ToArray();
// Act
var result = await AsyncValueEnumerableExtensions
.Where <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int>(wrapped, predicate.AsAsync())
.Select(selector.AsAsync())
.ToArrayAsync();
// Assert
_ = result.Must()
.BeArrayOf <string>()
.BeEqualTo(expected);
}
public async ValueTask FirstAsync_Predicate_Selector_With_ValidData_Must_Return_Some(int[] source, Predicate <int> predicate, NullableSelector <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
var expected = Enumerable
.Where(source, predicate.AsFunc())
.Select(selector.AsFunc())
.First();
// Act
var result = await AsyncValueEnumerableExtensions
.Where <Wrap.AsyncValueEnumerableWrapper <int>, Wrap.AsyncEnumerator <int>, int>(wrapped, predicate.AsAsync())
.Select(selector.AsAsync())
.FirstAsync();
// Assert
_ = result.Match(
value => value.Must().BeEqualTo(expected),
() => throw new Exception());
}