public void ElementAt_Skip_Take_Predicate_Selector_With_OutOfRange_Must_Return_None(int[] source, int skipCount, int takeCount, Func <int, bool> predicate, Func <int, string> selector)
{
// Arrange
var wrapped = Wrap.AsReadOnlyList(source);
// Act
var optionTooSmall = ReadOnlyListExtensions
.Skip <Wrap.ReadOnlyListWrapper <int>, int>(wrapped, skipCount)
.Take(takeCount)
.Where(predicate)
.Select(selector)
.ElementAt(-1);
var optionTooLarge = ReadOnlyListExtensions
.Skip <Wrap.ReadOnlyListWrapper <int>, int>(wrapped, skipCount)
.Take(takeCount)
.Where(predicate)
.Select(selector)
.ElementAt(takeCount);
// Assert
_ = optionTooSmall.Must()
.BeOfType <Option <string> >()
.EvaluateTrue(option => option.IsNone);
_ = optionTooLarge.Must()
.BeOfType <Option <string> >()
.EvaluateTrue(option => option.IsNone);
}
public void Single_Predicate_Selector_With_Single_Must_Return_Some(int[] source, int skipCount, int takeCount, Predicate <int> predicate, NullableSelector <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsReadOnlyList(source);
var expected = Enumerable
.Skip(source, skipCount)
.Take(takeCount)
.Where(predicate.AsFunc())
.Select(selector.AsFunc())
.Single();
// Act
var result = ReadOnlyListExtensions
.Skip <Wrap.ReadOnlyListWrapper <int>, int>(wrapped, skipCount)
.Take(takeCount)
.Where(predicate)
.Select(selector)
.Single();
// Assert
_ = result.Match(
value => value.Must().BeEqualTo(expected),
() => throw new Exception());
}
public void First_Predicate_Selector_With_ValidData_Must_Return_Some(int[] source, int skip, int take, Func <int, bool> predicate, Func <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsReadOnlyList <int>(source);
var expected = Enumerable
.Skip(source, skip)
.Take(take)
.Where(predicate)
.Select(selector)
.First();
// Act
var result = ReadOnlyListExtensions
.Skip <Wrap.ReadOnlyListWrapper <int>, int>(wrapped, skip)
.Take(take)
.Where(predicate)
.Select(selector)
.First();
// Assert
_ = result.Match(
value => value.Must().BeEqualTo(expected),
() => throw new Exception());
}
public void ToList_Skip_Take_Predicate_Selector_With_ValidData_Must_Succeed(int[] source, int skipCount, int takeCount, Predicate <int> predicate, NullableSelector <int, string> selector)
{
// Arrange
var wrapped = Wrap.AsReadOnlyList(source);
var expected = Enumerable
.Skip(source, skipCount)
.Take(takeCount)
.Where(predicate.AsFunc())
.Select(selector.AsFunc())
.ToArray();
// Act
var result = ReadOnlyListExtensions
.Skip <Wrap.ReadOnlyListWrapper <int>, int>(wrapped, skipCount)
.Take(takeCount)
.Where(predicate)
.Select(selector)
.ToList();
// Assert
_ = result.Must()
.BeOfType <List <string> >()
.BeEnumerableOf <string>()
.BeEqualTo(expected);
}
public void ToArray_Predicate_Selector_Must_Succeed(int[] source, int skip, int take, Func <int, bool> predicate, Func <int, string> selector)
{
// Arrange
var wrapped = Wrap.AsReadOnlyList(source);
var expected = Enumerable
.Skip(source, skip)
.Take(take)
.Where(predicate)
.Select(selector)
.ToArray();
// Act
var result = ReadOnlyListExtensions
.Skip <Wrap.ReadOnlyListWrapper <int>, int>(wrapped, skip)
.Take(take)
.Where(predicate)
.Select(selector)
.ToArray();
// Assert
_ = result.Must()
.BeNotSameAs(source)
.BeArrayOf <string>()
.BeEqualTo(expected);
}
public void ElementAt_Skip_Take_Predicate_Selector_With_ValidData_Must_Return_Some(int[] source, int skipCount, int takeCount, Func <int, bool> predicate, Func <int, string> selector)
{
// Arrange
var wrapped = Wrap.AsReadOnlyList(source);
var expected = Enumerable
.Skip(source, skipCount)
.Take(takeCount)
.Where(predicate)
.Select(selector)
.ToList();
for (var index = 0; index < expected.Count; index++)
{
// Act
var result = ReadOnlyListExtensions
.Skip <Wrap.ReadOnlyListWrapper <int>, int>(wrapped, skipCount)
.Take(takeCount)
.Where(predicate)
.Select(selector)
.ElementAt(index);
// Assert
_ = result.Match(
value => value.Must().BeEqualTo(expected[index]),
() => throw new Exception());
}
}
public int WhereHyper()
{
var sum = 0;
foreach (var item in ReadOnlyListExtensions.Where <ImmutableArray <int>, int>(array, item => (item & 0x01) == 0))
{
sum += item;
}
return(sum);
}
public void ReadOnlyListExtensions_Basics()
{
Assert.True(ReadOnlyListExtensions.AreEqual <int>(null, null));
Assert.False(ReadOnlyListExtensions.AreEqual <int>(new int[] { 1 }, null));
int[] array = Enumerable.Range(0, 100).ToArray();
int last = -1;
ReadOnlyListExtensions.ForEachReverse(array, (value) => last = value);
Assert.Equal(0, last);
}
public int SelectHyper()
{
var source = ReadOnlyListExtensions.Select <ImmutableArray <int>, int, int>(array, item => item);
var sum = 0;
for (var index = 0; index < source.Count; index++)
{
sum += source[index];
}
return(sum);
}
public override bool Equals(object obj)
{
if (obj is ArraySlice <T> )
{
return(Equals((ArraySlice <T>)obj));
}
else
{
return(ReadOnlyListExtensions.AreEqual(this, obj as IReadOnlyList <T>));
}
}
public int Hyperlinq_List_Reference()
{
var sum = 0;
foreach (var item in ReadOnlyListExtensions.SelectMany <
ReadOnlyListExtensions.ValueEnumerableWrapper <int>, int,
ValueEnumerable.ReturnEnumerable <int>, ValueEnumerable.ReturnEnumerable <int> .DisposableEnumerator, int>(
ReadOnlyListExtensions.AsValueEnumerable <int>(listReference), item => ValueEnumerable.Return(item)))
{
sum += item;
}
return(sum);
}
public void Contains_ReferenceType_With_Null_And_Contains_Must_ReturnTrue(int[] source)
{
// Arrange
var value = System.Linq.Enumerable.Last(source).ToString();
var wrapped = Wrap.AsValueReadOnlyList(source.AsValueEnumerable().Select(item => item.ToString()).ToArray());
// Act
var result = ReadOnlyListExtensions
.Contains <Wrap.ValueReadOnlyListWrapper <string>, string>(wrapped, value);
// Assert
_ = result.Must()
.BeTrue();
}
public void Contains_ValueType_With_Null_And_Contains_Must_ReturnTrue(int[] source)
{
// Arrange
var value = System.Linq.Enumerable.Last(source);
var wrapped = Wrap.AsValueReadOnlyList(source);
// Act
var result = ReadOnlyListExtensions
.Contains <Wrap.ValueReadOnlyListWrapper <int>, int>(wrapped, value);
// Assert
_ = result.Must()
.BeTrue();
}
public void Contains_ReferenceType_With_Null_And_NotContains_Must_ReturnFalse(int[] source)
{
// Arrange
var value = default(string);
var wrapped = Wrap.AsValueReadOnlyList(source.Select(item => item.ToString()).ToArray());
// Act
var result = ReadOnlyListExtensions
.Contains <Wrap.ValueReadOnlyListWrapper <string>, string>(wrapped, value);
// Assert
_ = result.Must()
.BeFalse();
}
public void Skip_With_ValidData_Must_Succeed(int[] source, int count)
{
// Arrange
var wrapped = Wrap.AsValueReadOnlyList(source);
var expected = System.Linq.Enumerable.Skip(source, count);
// Act
var result = ReadOnlyListExtensions.Skip <Wrap.ValueReadOnlyListWrapper <int>, int>(wrapped, count);
// Assert
_ = result.Must()
.BeEnumerableOf <int>()
.BeEqualTo(expected);
}
public void Contains_With_Comparer_And_NotContains_Must_ReturnFalse(int[] source)
{
// Arrange
var value = int.MaxValue;
var wrapped = Wrap.AsValueReadOnlyList(source);
// Act
var result = ReadOnlyListExtensions
.Contains <Wrap.ValueReadOnlyListWrapper <int>, int>(wrapped, value, EqualityComparer <int> .Default);
// Assert
_ = result.Must()
.BeFalse();
}
public void Select_With_NullSelector_Must_Throw()
{
// Arrange
var source = Wrap.AsReadOnlyList(new int[0]);
var selector = (NullableSelectorAt <int, string>)null;
// Act
Action action = () => _ = ReadOnlyListExtensions.Select <Wrap.ReadOnlyListWrapper <int>, int, string>(source, selector);
// Assert
_ = action.Must()
.Throw <ArgumentNullException>()
.EvaluateTrue(exception => exception.ParamName == "selector");
}
public void All_With_NullPredicate_Must_Throw()
{
// Arrange
var wrapped = Wrap.AsValueReadOnlyList(new int[0]);
var predicate = (Predicate <int>)null;
// Act
Action action = () => _ = ReadOnlyListExtensions
.All <Wrap.ValueReadOnlyListWrapper <int>, int>(wrapped, predicate);
// Assert
_ = action.Must()
.Throw <ArgumentNullException>()
.EvaluateTrue(exception => exception.ParamName == "predicate");
}
public void First_With_Empty_Must_Return_None(int[] source)
{
// Arrange
var wrapped = Wrap
.AsReadOnlyList <int>(source);
// Act
var result = ReadOnlyListExtensions
.First <Wrap.ReadOnlyListWrapper <int>, int>(wrapped);
// Assert
_ = result.Must()
.BeOfType <Option <int> >()
.EvaluateTrue(option => option.IsNone);
}
public void Any_Predicate_With_ValidData_Must_Succeed(int[] source, Predicate <int> predicate)
{
// Arrange
var wrapped = Wrap.AsValueReadOnlyList(source);
var expected =
System.Linq.Enumerable.Any(wrapped, predicate.AsFunc());
// Act
var result = ReadOnlyListExtensions
.Any <Wrap.ValueReadOnlyListWrapper <int>, int>(wrapped, predicate);
// Assert
_ = result.Must()
.BeEqualTo(expected);
}
public void Where_With_NullPredicate_Must_Throw()
{
// Arrange
var list = Wrap
.AsReadOnlyList(new int[0]);
var predicate = (PredicateAt <int>)null;
// Act
Action action = () => _ = ReadOnlyListExtensions.Where(list, predicate);
// Assert
_ = action.Must()
.Throw <ArgumentNullException>()
.EvaluateTrue(exception => exception.ParamName == "predicate");
}
public void All_PredicateAt_With_ValidData_Must_Succeed(int[] source, PredicateAt <int> predicate)
{
// Arrange
var wrapped = Wrap.AsValueReadOnlyList(source);
var expected =
System.Linq.Enumerable.Count(
System.Linq.Enumerable.Where(source, predicate.AsFunc())) == source.Length;
// Act
var result = ReadOnlyListExtensions
.All <Wrap.ValueReadOnlyListWrapper <int>, int>(wrapped, predicate);
// Assert
_ = result.Must()
.BeEqualTo(expected);
}
public void WhereSelect_Predicate_With_Null_Must_Throw()
{
// Arrange
var source = Wrap.AsReadOnlyList(new int[0]);
var predicate = (Predicate <int>)null;
// Act
Action action = () => _ = ReadOnlyListExtensions
.Where <Wrap.ReadOnlyListWrapper <int>, int>(source, predicate)
.Select(item => item.ToString());
// Assert
_ = action.Must()
.Throw <ArgumentNullException>()
.EvaluateTrue(exception => exception.ParamName == "predicate");
}
public void Count_With_ValidData_Must_Succeed(int[] source)
{
// Arrange
var wrapped = Wrap
.AsReadOnlyList(source);
var expected = Enumerable
.Count(source);
// Act
var result = ReadOnlyListExtensions
.Count <Wrap.ReadOnlyListWrapper <int>, int>(wrapped);
// Assert
_ = result.Must()
.BeEqualTo(expected);
}
public void Select_With_ValidData_Must_Succeed(int[] source, NullableSelectorAt <int, string> selector)
{
// Arrange
var wrapped = Wrap.AsReadOnlyList(source);
var expected =
System.Linq.Enumerable.Select(wrapped, selector.AsFunc());
// Act
var result = ReadOnlyListExtensions
.Select <Wrap.ReadOnlyListWrapper <int>, int, string>(wrapped, selector);
// Assert
_ = result.Must()
.BeEnumerableOf <string>()
.BeEqualTo(expected);
}
public void AsValueEnumerable_With_ValidData_Must_Succeed(int[] source)
{
// Arrange
var wrapped = Wrap
.AsReadOnlyList(source);
// Act
var result = ReadOnlyListExtensions
.AsValueEnumerable(wrapped);
// Assert
_ = result.Must()
.BeOfType <ReadOnlyListExtensions.ValueEnumerableWrapper <int> >()
.BeEnumerableOf <int>()
.BeEqualTo(wrapped);
}
public void Contains_Skip_Take_With_Comparer_And_NotContains_Must_ReturnFalse(int[] source, int skip, int take)
{
// Arrange
var value = int.MaxValue;
var wrapped = Wrap.AsValueReadOnlyList(source);
// Act
var result = ReadOnlyListExtensions
.Skip <Wrap.ValueReadOnlyListWrapper <int>, int>(wrapped, skip)
.Take(take)
.Contains(value, TestComparer <int> .Instance);
// Assert
_ = result.Must()
.BeFalse();
}
public void ToList_Predicate_With_Null_Must_Throw()
{
// Arrange
var source = new int[0];
var wrapped = Wrap.AsReadOnlyList(source);
var predicate = (Predicate <int>)null;
// Act
Action action = () => _ = ReadOnlyListExtensions
.Where(wrapped, predicate)
.ToList();
// Assert
_ = action.Must()
.Throw <ArgumentNullException>()
.EvaluateTrue(exception => exception.ParamName == "predicate");
}
public void First_With_ValidData_Must_Return_Some(int[] source)
{
// Arrange
var wrapped = Wrap
.AsReadOnlyList <int>(source);
var expected = Enumerable
.First(source);
// Act
var result = ReadOnlyListExtensions
.First <Wrap.ReadOnlyListWrapper <int>, int>(wrapped);
// Assert
_ = result.Match(
value => value.Must().BeEqualTo(expected),
() => throw new Exception());
}
public void ToList_SelectorAt_With_Null_Must_Throw()
{
// Arrange
var source = new int[0];
var wrapped = Wrap.AsReadOnlyList(source);
var selector = (NullableSelectorAt <int, string>)null;
// Act
Action action = () => _ = ReadOnlyListExtensions
.Select(wrapped, selector)
.ToList();
// Assert
_ = action.Must()
.Throw <ArgumentNullException>()
.EvaluateTrue(exception => exception.ParamName == "selector");
}