public void SortAccordingTo_NullKeySelector_ReturnsException()
{
var sourceCollection = new[] {"A", "B", "C", "D"};
var templateCollection = new[] {"A", "B", "C", "D"};
Assert.Throws<ArgumentNullException>(() => sourceCollection.SortAccordingTo(templateCollection, null));
}
public void SortAccordingTo_EmptyTemplateCollection_ReturnsSameSourceCollection()
{
var sourceCollection = new[] {"A", "B", "C", "D"};
var templateCollection = Enumerable.Empty<string>();
var result = sourceCollection.SortAccordingTo(templateCollection);
Assert.AreEqual(sourceCollection, result);
}
public void SortAccordingTo_TemplateCollectionThatContainsAllValuesInSourceCollection_ReturnsCorrectSequence()
{
var sourceCollection = new[] {"A", "B", "C", "B", "A", "C", "D", "D"};
var templateCollection = new[] {"B", "A", "D", "C"};
var result = sourceCollection.SortAccordingTo(templateCollection);
var expected = new[] {"B", "B", "A", "A", "D", "D", "C", "C"};
Assert.AreEqual(expected, result);
}
public void SortAccordingTo_UsingIntegers_ReturnsCorrectSequence()
{
var sourceCollection = new[] {2, 3, 9, 4, 1, 6};
var templateCollection = Enumerable.Range(0, 10);
var result = sourceCollection.SortAccordingTo(templateCollection);
var expected = new[] {1, 2, 3, 4, 6, 9};
Assert.AreEqual(expected, result);
}
public void SortAccordingTo_UseComparer_ReturnsCorrectSequence()
{
var sourceCollection = new[] {"A", "b", "c", "C", "B", "a", "D", "E", "a", "B"};
var templateCollection = new[] {"B", "c", "A"};
var result = sourceCollection.SortAccordingTo(templateCollection, comparer: StringComparer.CurrentCultureIgnoreCase);
var expected = new[] {"b", "B", "B", "c", "C", "A", "a", "a", "D", "E"};
Assert.AreEqual(expected, result);
}
public void SortAccordingTo_TemplateCollectionDoesNotContainAllValuesInSourceCollection_DoNotIncludeNoMatches_ReturnsCorrectSequence()
{
var sourceCollection = new[] {"A", "B", "C", "B", "A", "C", "D", "D"};
var templateCollection = new[] {"B", "D", "C"};
var result = sourceCollection.SortAccordingTo(templateCollection, false);
// Since "A" does not exist in the template collection they are placed at the end of the sequence
var expected = new[] {"B", "B", "D", "D", "C", "C"};
Assert.AreEqual(expected, result);
}
public void SortAccordingTo_TemplateCollectionDoesNotContainAllValuesInSourceCollection_ReturnsCorrectSequence2()
{
var sourceCollection = new[] {"X", "A", "B", "C", "Y", "B", "A", "C", "Z", "D", "D"};
var templateCollection = new[] {"B", "D", "C"};
var result = sourceCollection.SortAccordingTo(templateCollection);
// Slightly more complicated than the previous test
// NOTE: no matches get sorted amongst themselves in the order they appear in the list.
var expected = new[] {"B", "B", "D", "D", "C", "C", "X", "A", "A", "Y", "Z"};
Assert.AreEqual(expected, result);
}
public void SortAccordingTo_TemplateCollectionSomeValuesInSourceCollection_ReturnsCorrectSequence()
{
var sourceCollection = new[] {"A", "B", "C", "B", "A", "C", "D", "D"};
var templateCollection = new[] {"B", "D", "C"};
var result = sourceCollection.SortAccordingTo(templateCollection);
// Since "A" does not exist int he template collection they are placed at the end of the sequence
var expected = new[] {"B", "B", "D", "D", "C", "C", "A", "A"};
Assert.AreEqual(expected, result);
}
