public static void Eagerly_throws_ArgumentNullException_when_sequence_is_null_with_equality_comparer()
{
IEnumerable<char> nullSequence = null;
IEqualityComparer<char> stringLengthEqualityComparer = new StringLengthEqualityComparer<char>();
Assert.Throws<ArgumentNullException>(() => nullSequence.Without(stringLengthEqualityComparer, 'c'));
}
public static void Eagerly_throws_ArgumentNullException_when_elements_to_remove_collection_is_null_with_equality_comparer()
{
IEnumerable<char> letters = "abcd";
IEqualityComparer<char> stringLengthEqualityComparer = new StringLengthEqualityComparer<char>();
Assert.Throws<ArgumentNullException>(() => letters.Without(stringLengthEqualityComparer, null));
}
public static void Does_not_remove_elements_that_do_not_match_the_passed_element_but_each_other()
{
IEnumerable<string> fruits = new[] { "apple", "apricot", "banana", "cherry" };
const string elementToRemove = "apricot";
IEqualityComparer<string> stringLengthEqualityComparer = new StringLengthEqualityComparer<string>();
IEnumerable<string> fruitsWithoutElement = fruits.Without(stringLengthEqualityComparer, elementToRemove);
fruitsWithoutElement.Should().NotContain("apricot");
fruitsWithoutElement.Should().HaveCount(3);
}
private static void ToLookup()
{
Console.WriteLine("\n ToLookup");
Console.WriteLine(" Employees in lookup, key is id:");
foreach (var employeeGroup in employees.ToLookup(e => e.id))
{
foreach (var employee in employeeGroup)
{
Console.WriteLine($"Key {employeeGroup.Key.ToString().PadRight(10)} Value {employee}");
}
}
Console.WriteLine(" Employees in lookup, key is id, firstname is selector:");
foreach (var employeeGroup in employees.ToLookup(e => e.id, e => e.firstName))
{
foreach (var employee in employeeGroup)
{
Console.WriteLine($"Key {employeeGroup.Key.ToString().PadRight(10)} Value {employee}");
}
}
Console.WriteLine(" Employees in lookup, key is firstName, lastName is selector, String length compare:");
foreach (var employeeGroup in employees.ToLookup(e => e.firstName, e => e.lastName, new StringLengthEqualityComparer()))
{
if (StringLengthEqualityComparer.IsSmall(employeeGroup.Key))
{
Console.WriteLine($" Small first name length:");
}
else
{
Console.WriteLine($" Big first name length:");
}
foreach (var employee in employeeGroup)
{
Console.WriteLine($"Key {employeeGroup.Key.ToString().PadRight(10)} Value {employee}");
}
}
}
public static void Returns_sequence_without_elements_equal_to_passed_element()
{
IEnumerable<string> fruits = new[] { "apple", "apricot", "banana", "cherry" };
const string elementToRemove = "banana";
IEqualityComparer<string> stringLengthEqualityComparer = new StringLengthEqualityComparer<string>();
fruits = fruits.Without(stringLengthEqualityComparer, elementToRemove);
fruits.Should().NotContain("banana");
fruits.Should().NotContain("cherry");
fruits.Should().HaveCount(2);
}
public static void Returns_unmodified_sequence_when_sequence_does_not_contain_any_element_to_remove_with_equality_comparer()
{
IEnumerable<string> stringNumbers = new[] { "1", "22", "333", "4444" };
const string elementToRemove = "55555";
IEqualityComparer<string> stringLengthEqualityComparer = new StringLengthEqualityComparer<string>();
stringNumbers = stringNumbers.Without(stringLengthEqualityComparer, elementToRemove);
stringNumbers.Should().HaveCount(4);
}
private static void GroupBy()
{
Console.WriteLine("\n GroupBy");
Console.WriteLine(" Entries grouped by id");
foreach (var entrieGroup in employeesOptionEntries.GroupBy(e => e.id))
{
Console.WriteLine($" Group id = {entrieGroup.Key}");
foreach (var entrie in entrieGroup)
{
entrie.Print();
}
}
Console.WriteLine(" Employees grouped by firstName <= 5 and firstname > 5");
foreach (var employeeGroup in employees.GroupBy(e => e.firstName, new StringLengthEqualityComparer()))
{
if (StringLengthEqualityComparer.IsSmall(employeeGroup.Key))
{
Console.WriteLine($" Small first name length:");
}
else
{
Console.WriteLine($" Big first name length:");
}
foreach (var employee in employeeGroup)
{
employee.Print();
}
}
Console.WriteLine(" Date awarded for employees");
foreach (var entrieGroup in employeesOptionEntries.GroupBy(e => e.id, o => o.dateAwarded))
{
employees.Where(e => e.id == entrieGroup.Key).FirstOrDefault().Print();
foreach (var entrie in entrieGroup)
{
Console.WriteLine(entrie);
}
}
Console.WriteLine(" Date awarded for employees with firstname <= 5 and firstName > 5");
var employeesAndTheirOptionEntries = employees.Join(employeesOptionEntries, e => e.id, e => e.id, (e, o) => new { employee = e, employeeOptionEntry = o });
foreach (var group in employeesAndTheirOptionEntries.GroupBy(x => x.employee.firstName, x => x.employeeOptionEntry.dateAwarded, new StringLengthEqualityComparer()))
{
if (StringLengthEqualityComparer.IsSmall(group.Key))
{
Console.WriteLine($" Small first name length:");
}
else
{
Console.WriteLine($" Big first name length:");
}
foreach (var date in group.OrderBy(x => x))
{
Console.WriteLine(date);
}
}
}
