public void Single_With_Multiple_Must_Return_None(int[] source)
{
// Arrange
var wrapped = Wrap
.AsValueList(source);
// Act
var result = wrapped.AsValueEnumerable()
.Single();
// Assert
_ = result.Must()
.BeOfType <Option <int> >()
.EvaluateTrue(option => option.IsNone);
}
public void Single_Predicate_With_Empty_Must_Return_None(int[] source, Func <int, bool> predicate)
{
// Arrange
var wrapped = Wrap
.AsValueList(source);
// Act
var result = wrapped.AsValueEnumerable()
.Where(predicate)
.Single();
// Assert
_ = result.Must()
.BeOfType <Option <int> >()
.EvaluateTrue(option => option.IsNone);
}
public void Single_SelectorAt_With_Empty_Must_Return_None(int[] source, Func <int, int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsValueList(source);
// Act
var result = wrapped.AsValueEnumerable()
.Select(selector)
.Single();
// Assert
_ = result.Must()
.BeOfType <Option <string> >()
.EvaluateTrue(option => option.IsNone);
}
public void Single_With_Single_Must_Return_Some(int[] source)
{
// Arrange
var wrapped = Wrap
.AsValueList(source);
var expected = source
.Single();
// Act
var result = wrapped.AsValueEnumerable()
.Single();
// Assert
_ = result.Match(
value => value.Must().BeEqualTo(expected),
() => throw new Exception());
}
public void First_Predicate_With_ValidData_Must_Return_Some(int[] source, Func <int, bool> predicate)
{
// Arrange
var wrapped = Wrap
.AsValueList(source);
var expected = source
.First(predicate);
// Act
var result = wrapped.AsValueEnumerable()
.Where(predicate)
.First();
// Assert
_ = result.Match(
value => value.Must().BeEqualTo(expected),
() => throw new Exception());
}
public void First_SelectorAt_With_ValidData_Must_Return_Some(int[] source, Func <int, int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsValueList(source);
var expected = source
.Select(selector)
.First();
// Act
var result = wrapped.AsValueEnumerable()
.Select(selector)
.First();
// Assert
_ = result.Match(
value => value.Must().BeEqualTo(expected),
() => throw new Exception());
}
public void ElementAt_With_ValidData_Must_Return_Some(int[] source)
{
for (var index = 0; index < source.Length; index++)
{
// Arrange
var wrapped = Wrap
.AsValueList(source);
var expected = source
.ElementAt(index);
// Act
var result = wrapped.AsValueEnumerable()
.ElementAt(index);
// Assert
_ = result.Match(
value => value.Must().BeEqualTo(expected),
() => throw new Exception());
}
}
public void ElementAt_With_OutOfRange_Must_Return_None(int[] source)
{
// Arrange
var wrapped = Wrap
.AsValueList(source);
// Act
var optionNegative = wrapped.AsValueEnumerable()
.ElementAt(-1);
var optionTooLarge = wrapped.AsValueEnumerable()
.ElementAt(source.Length);
// Assert
_ = optionNegative.Must()
.BeOfType <Option <int> >()
.EvaluateTrue(option => option.IsNone);
_ = optionTooLarge.Must()
.BeOfType <Option <int> >()
.EvaluateTrue(option => option.IsNone);
}
public void Single_Predicate_Selector_With_Single_Must_Return_Some(int[] source, Func <int, bool> predicate, Func <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsValueList(source);
var expected = source
.Where(predicate)
.Select(selector)
.Single();
// Act
var result = wrapped.AsValueEnumerable()
.Where(predicate)
.Select(selector)
.Single();
// Assert
_ = result.Match(
value => value.Must().BeEqualTo(expected),
() => throw new Exception());
}
public void ElementAt_Predicate_With_ValidData_Must_Return_Some(int[] source, Func <int, bool> predicate)
{
// Arrange
var wrapped = Wrap
.AsValueList(source);
var expected = source
.Where(predicate)
.ToList();
for (var index = 0; index < expected.Count; index++)
{
// Act
var result = wrapped.AsValueEnumerable()
.Where(predicate)
.ElementAt(index);
// Assert
_ = result.Match(
value => value.Must().BeEqualTo(expected[index]),
() => throw new Exception());
}
}
public void ElementAt_Predicate_Selector_With_OutOfRange_Must_Return_None(int[] source, Func <int, bool> predicate, Func <int, string> selector)
{
// Arrange
var wrapped = Wrap
.AsValueList(source);
// Act
var optionNegative = wrapped.AsValueEnumerable()
.Where(predicate)
.Select(selector)
.ElementAt(-1);
var optionTooLarge = wrapped.AsValueEnumerable()
.Where(predicate)
.Select(selector)
.ElementAt(source.Length);
// Assert
_ = optionNegative.Must()
.BeOfType <Option <string> >()
.EvaluateTrue(option => option.IsNone);
_ = optionTooLarge.Must()
.BeOfType <Option <string> >()
.EvaluateTrue(option => option.IsNone);
}
