//[Fact]
        public async Task FindTeacher_ShouldReturnAnonymousObject_WhenUknownIdPassed()
        {
            // Arrange
            var teacherId = 0;

            // Act
            _repoMock.Setup(x => x.GetById(teacherId)).ReturnsAsync((Teacher)null);
            var result = await _controller.FindTeacher(teacherId);

            var valueFromAnnonymous = result.Value.GetType().GetProperty("text").GetValue(result.Value, null);

            // Assert
            Assert.NotNull(result);
            Assert.Equal("Server error!", valueFromAnnonymous);
        }