public async void ElementAtAsync_Predicate_Selector_With_OutOfRange_Must_Return_None(int[] source, Predicate <int> predicate, Selector <int, string> selector)
{
// Arrange
var wrapped = Wrap.AsAsyncValueEnumerable(source);
// Act
var optionNegative = await AsyncValueEnumerable
.Where <Wrap.AsyncValueEnumerable <int>, Wrap.AsyncEnumerator <int>, int>(wrapped, predicate.AsAsync())
.Select(selector.AsAsync())
.ElementAtAsync(-1);
var optionTooLarge = await AsyncValueEnumerable
.Where <Wrap.AsyncValueEnumerable <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 async ValueTask ContainsAsync_Predicate_Selector_With_Comparer_And_NotContains_Must_ReturnFalse(int[] source, Predicate <int> predicate, Selector <int, string> selector)
{
// Arrange
var value = "!";
var wrapped = Wrap.AsAsyncValueEnumerable(source);
// Act
var result = await AsyncValueEnumerable
.Where <Wrap.AsyncValueEnumerable <int>, Wrap.AsyncEnumerator <int>, int>(wrapped, predicate.AsAsync())
.Select(selector.AsAsync())
.ContainsAsync(value, EqualityComparer <string> .Default);
// Assert
_ = result.Must()
.BeFalse();
}
public async void FirstAsync_Predicate_Selector_With_Empty_Must_Return_None(int[] source, Predicate <int> predicate, Selector <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
// Act
var result = await AsyncValueEnumerable
.Where <Wrap.AsyncValueEnumerable <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 ContainsAsync_Predicate_Selector_With_Null_And_Contains_Must_ReturnTrue(int[] source, Predicate <int> predicate, Selector <int, string> selector)
{
// Arrange
var value =
System.Linq.Enumerable.Last(
System.Linq.Enumerable.Select(
System.Linq.Enumerable.Where(source, predicate.AsFunc()), selector.AsFunc()));
var wrapped = Wrap.AsAsyncValueEnumerable(source);
// Act
var result = await AsyncValueEnumerable
.Where <Wrap.AsyncValueEnumerable <int>, Wrap.AsyncEnumerator <int>, int>(wrapped, predicate.AsAsync())
.Select(selector.AsAsync())
.ContainsAsync(value, null);
// Assert
_ = result.Must()
.BeTrue();
}
public async ValueTask ToArrayAsync_Predicate_Selector_With_ValidData_Must_Succeed(int[] source, Predicate <int> predicate, Selector <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
var expected =
System.Linq.Enumerable.ToArray(
System.Linq.Enumerable.Select(
System.Linq.Enumerable.Where(source, predicate.AsFunc()), selector.AsFunc()));
// Act
var result = await AsyncValueEnumerable
.Where <Wrap.AsyncValueEnumerable <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, Selector <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
var expected =
System.Linq.Enumerable.First(
System.Linq.Enumerable.Select(
System.Linq.Enumerable.Where(source, predicate.AsFunc()), selector.AsFunc()));
// Act
var result = await AsyncValueEnumerable
.Where <Wrap.AsyncValueEnumerable <int>, Wrap.AsyncEnumerator <int>, int>(wrapped, predicate.AsAsync())
.Select(selector.AsAsync())
.FirstAsync();
// Assert
_ = result.Match(
value => value.Must().BeEqualTo(expected),
() => throw new Exception());
}
public async ValueTask ForEachAsync_ActionAt_Predicate_Selector_With_ValidData_Must_Succeed(int[] source, Predicate <int> predicate, Selector <int, string> selector)
{
// Arrange
var wrapped = Wrap.AsAsyncValueEnumerable(source);
var result = new List <(string, int)>();
var expected = new List <(string, int)>();
System.Linq.EnumerableEx.ForEach(
System.Linq.Enumerable.Select(
System.Linq.Enumerable.Where(source, predicate.AsFunc()), selector.AsFunc()), (item, index) => expected.Add((item, index)));
// Act
await AsyncValueEnumerable
.Where <Wrap.AsyncValueEnumerable <int>, Wrap.AsyncEnumerator <int>, int>(wrapped, predicate.AsAsync())
.Select(selector.AsAsync())
.ForEachAsync((item, index, cancellationToken) => { result.Add((item, index)); return(new ValueTask()); });
// Assert
_ = result.Must()
.BeEnumerableOf <(string, int)>()
.BeEqualTo(expected);
}
public async ValueTask ToListAsync_Selector_With_ValidData_Must_Succeed(int[] source, Selector <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
var expected =
System.Linq.Enumerable.ToList(
System.Linq.Enumerable.Select(source, selector.AsFunc()));
// Act
var result = await AsyncValueEnumerable
.Select <Wrap.AsyncValueEnumerable <int>, Wrap.AsyncEnumerator <int>, int, string>(wrapped, selector.AsAsync())
.ToListAsync();
// Assert
_ = result.Must()
.BeOfType <List <string> >()
.BeEnumerableOf <string>()
.BeEqualTo(expected);
}
public async ValueTask ContainsAsync_Selector_With_Comparer_And_Contains_Must_ReturnTrue(int[] source, Selector <int, string> selector)
{
// Arrange
var value =
System.Linq.Enumerable.Last(
System.Linq.Enumerable.Select(source, selector.AsFunc()));
var wrapped = Wrap.AsAsyncValueEnumerable(source);
// Act
var result = await AsyncValueEnumerable
.Select <Wrap.AsyncValueEnumerable <int>, Wrap.AsyncEnumerator <int>, int, string>(wrapped, selector.AsAsync())
.ContainsAsync(value, EqualityComparer <string> .Default);
// Assert
_ = result.Must()
.BeTrue();
}
public async ValueTask ContainsAsync_Selector_With_Null_And_NotContains_Must_ReturnFalse(int[] source, Selector <int, string> selector)
{
// Arrange
var value = "!";
var wrapped = Wrap.AsAsyncValueEnumerable(source);
// Act
var result = await AsyncValueEnumerable
.Select <Wrap.AsyncValueEnumerable <int>, Wrap.AsyncEnumerator <int>, int, string>(wrapped, selector.AsAsync())
.ContainsAsync(value, null);
// Assert
_ = result.Must()
.BeFalse();
}
public async ValueTask ElementAtAsync_Selector_With_ValidData_Must_Return_Some(int[] source, Selector <int, string> selector)
{
for (var index = 0; index < source.Length; index++)
{
// Arrange
var wrapped = Wrap.AsAsyncValueEnumerable(source);
var expected =
System.Linq.Enumerable.ElementAt(
System.Linq.Enumerable.Select(source, selector.AsFunc()), index);
// Act
var result = await AsyncValueEnumerable
.Select <Wrap.AsyncValueEnumerable <int>, Wrap.AsyncEnumerator <int>, int, string>(wrapped, selector.AsAsync())
.ElementAtAsync(index);
// Assert
_ = result.Match(
value => value.Must().BeEqualTo(expected),
() => throw new Exception());
}
}
public async void SingleAsync_Selector_With_Multiple_Must_Return_None(int[] source, Selector <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
// Act
var result = await AsyncValueEnumerable
.Select <Wrap.AsyncValueEnumerable <int>, Wrap.AsyncEnumerator <int>, int, string>(wrapped, selector.AsAsync())
.SingleAsync();
// Assert
_ = result.Must()
.BeOfType <Option <string> >()
.EvaluateTrue(option => option.IsNone);
}
public async ValueTask SingleAsync_Selector_With_SingleAsync_Must_Return_Some(int[] source, Selector <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsAsyncValueEnumerable(source);
var expected =
System.Linq.Enumerable.Single(
System.Linq.Enumerable.Select(source, selector.AsFunc()));
// Act
var result = await AsyncValueEnumerable
.Select <Wrap.AsyncValueEnumerable <int>, Wrap.AsyncEnumerator <int>, int, string>(wrapped, selector.AsAsync())
.SingleAsync();
// Assert
_ = result.Match(
value => value.Must().BeEqualTo(expected),
() => throw new Exception());
}
