Using WireMock in UnitTests

WireMock with your favorite UnitTest framework

Obviously you can use your favorite test framework and use WireMock.Net within your tests. In order to avoid flaky tests you should:

• let WireMock.Net choose ports dynamically. Avoid hard coded ports in your tests. This can cause issues when running these unit-tests on a build-server, there is not 100% guarantee that this port will be free on the OS.
• clean up the request log or shutdown the server at the end of each test

Below a simple example using Nunit and NFluent test assertion library:

[SetUp]
public void StartMockServer()
{
    _server = WireMockServer.Start();
}

[Test]
public async Task Should_respond_to_request()
{
  // Arrange (start WireMock.Net server)
  _server
    .Given(Request.Create().WithPath("/foo").UsingGet())
    .RespondWith(
      Response.Create()
        .WithStatusCode(200)
        .WithBody(@"{ ""msg"": ""Hello world!"" }")
    );

  // Act (use a HttpClient which connects to the URL where WireMock.Net is running)
  var response = await new HttpClient().GetAsync($"{_server.Urls[0]}/foo");
    
  // Assert
  Check.That(response).IsEqualTo(EXPECTED_RESULT);
}

[TearDown]
public void ShutdownServer()
{
    _server.Stop();
}

For some more examples: see https://github.com/bredah/csharp-wiremock