public void ChangeRepresentative_Valid()
{
// Arrange
var expected = "*****@*****.**";
if (!userService.FindRolesByEmail("*****@*****.**").Contains("DepartmentHead"))
{
userService.AddDepartmentHeadRole("*****@*****.**");
}
// Act
departmentService.ChangeRepresentative(expected, "*****@*****.**");
// Assert
Assert.AreEqual(expected, new UserRepository(context).FindByEmail("*****@*****.**").Department.Representative.Email);
}