public void ComparerSorterSort_WhenCollectionHasASingleElement_ShouldReturnCollectionWithSingleElement()
{
KeyValuePair<string, int>[] collection =
{
new KeyValuePair<string, int>("Test", 1)
};
var sorter = new ComparerSorter();
// act
var result = sorter.Sort(collection);
// assert
Assert.AreEqual(collection.Count(), result.Count());
Assert.AreEqual(collection[0], result.ElementAt(0));
}
public void ComparerSorterSort_WhenCollectionHasTwoSortedElements_ShouldReturnTheSameElementInTheSameOrder()
{
KeyValuePair<string, int>[] collection =
{
new KeyValuePair<string, int>("Test 1", 1),
new KeyValuePair<string, int>("Test 2", 2)
};
var sorter = new ComparerSorter();
// act
var result = sorter.Sort(collection);
// assert
Assert.AreEqual(collection.Length, result.Count());
for (int i = 0; i < collection.Length; i++)
{
Assert.AreEqual(collection[i], result.ElementAt(i));
}
}
public void ComparerSorterSort_WhenCollectionHasTwoUnsortedElements_ShouldReturnTheSameElementInTheSameOrder()
{
KeyValuePair<string, int>[] collection =
{
new KeyValuePair<string, int>("Test 2", 2),
new KeyValuePair<string, int>("Test 1", 1)
};
var sorter = new ComparerSorter();
// act
var actual = sorter.Sort(collection);
var expected = collection.OrderBy(item => item.Value).ToArray();
// assert
Assert.AreEqual(expected.Count(), actual.Count());
for (int i = 0; i < expected.Count(); i++)
{
Assert.AreEqual(expected.ElementAt(i), actual.ElementAt(i));
}
}
public void ComparerSorterSort_WhenCollectionIsEmpty_ShouldReturnEmtpyCollection()
{
// arrange
KeyValuePair<string, int>[] collection = { };
var sorter = new ComparerSorter();
// act
var result = sorter.Sort(collection);
// assert
Assert.IsNotNull(result);
Assert.AreEqual(0, result.Count());
}
public void ComparerSorterSort_WhenCollectionIsNull_ShouldThrow()
{
// arrange
KeyValuePair<string, int>[] collection = null;
var sorter = new ComparerSorter();
// act
var result = sorter.Sort(collection);
}