public void CountReturnNumberOfElementsThatMatchThePredicate()
{
var values = new[] { 1, 2, 3 };
Assert.AreEqual(2, values.Count(v => v >= 2));
}
public void CountReturnNumberOfElementsWhenNoPredicateIsDefined()
{
var values = new[] { 1, 2, 3 };
Assert.AreEqual(3, values.Count());
}
public void AnyReturnsTrueWhenAllElementsMatchThePredicate()
{
var values = new[] { 1, 2, 3 };
Assert.IsTrue(values.Any(v => v > 0));
}
public void AnyReturnsTrueWhenAtLeastOneElementMatchesThePredicate()
{
var values = new[] { 1, 2, 3 };
Assert.IsTrue(values.Any(v => v >= 3));
}
public void AnyReturnsFalseNoElementMatchesThePredicate()
{
var values = new[] { 1, 2, 3 };
Assert.IsFalse(values.Any(v => v == 4));
}
public void AllReturnsTrueWhenAllElementMatchThePredicate()
{
var values = new[] { 1, 2, 3 };
Assert.IsTrue(values.All(v => v < 4));
}
public void AllReturnsFalseWhenAtLeastOneElementDoesNotMatchThePredicate()
{
var values = new[] { 1, 2, 3 };
Assert.IsFalse(values.All(v => v < 3));
}
public void ElementAtReturnsElementAtTheSpecifiedIndex()
{
var values = new[] { 1, 2, 3 };
Assert.AreEqual(2, values.ElementAt(1));
}
static void Main(string[] args)
{
Linq.Demonstrate();
}
