public async System.Threading.Tasks.Task TestPostTeacher_Succesfull_ReturnsCreatedTeacher()
{
//Arrange
var context = TestingUtilities.CreateInMemoryDatabaseContext("PostTeacherSuccefull");
var testEntity = new Teacher()
{
Id = 42
};
var controller = new TeachersController(context);
//Act
var result = await controller.Post(testEntity);
//Assert
Assert.IsType <CreatedAtActionResult>(result.Result);
Assert.Equal(testEntity, context.Teachers.Last());
context.Database.EnsureDeleted();
}