private async Task TestSelects()
{
List <TeacherGroup> teacherGroupActual = await groupStorage.TeacherGroupGetAll();
for (int i = 0; i < listTeacherGroup.Count; i++)
{
Assert.Contains(listTeacherGroup[i], teacherGroupActual);
}
TeacherGroup actualteacherGroup = await groupStorage.TeacherGroupGetById((int)listTeacherGroup[0].Id);
Assert.AreEqual(listTeacherGroup[0], actualteacherGroup);
}