[TestMethod]
public async Task Given_Parameters_When_Invoked_Then_InvokeAsync_Should_Return_Result()
{
    // Arrange
    var result = new OkResult();

    var function = new Mock<IHealthCheckFunction>();
    function.Setup(p => p.InvokeAsync<HttpRequest, IActionResult>(It.IsAny<HttpRequest>(), It.IsAny<FunctionOptionsBase>()))
            .ReturnsAsync(result);

    var trigger = new HealthCheckHttpTrigger(function.Object);

    var req = new Mock<HttpRequest>();
    var log = new Mock<ILogger>();

    // Action
    var response = await trigger.PingAsync(req.Object, log.Object).ConfigureAwait(false);

    // Assert
    response
        .Should().BeOfType<OkResult>()
        .And.Subject.As<OkResult>()
            .StatusCode.Should().Be((int)HttpStatusCode.OK);
}