public async Task GetStudentIdsWithMatchingEmailShouldReturnStudents()
{
var dbOptions = new DbContextOptionsBuilder <ApplicationDbContext>()
.UseInMemoryDatabase("test");
var context = new ApplicationDbContext(dbOptions.Options);
var roleService = new WebSchool.Services.RolesService(context);
var studentsService = new StudentsService(context, roleService);
var school = new School();
await context.Schools.AddAsync(school);
await context.SaveChangesAsync();
var students = studentsService.GetStudentIdsWithMatchingEmail("email", "12 D", school.Id);
Assert.That(students.Count == 0);
}