TestableHttpClient 0.9.3

TestableHttpClient

Creating unittest for code that uses HttpClient can be difficult to test. It requires a custom HttpMessageHandler or a mocked version. TestableHttpClient provides a testable version of HttpMessageHandler and several helper functions to configure the TestableHttpHandler and several ways to assert which requests were made.

How to install

TestableHttpClient is released as a NuGet packages and can be installed via the NuGet manager in VisualStudio or by running the following command on the command line:

dotnet add package TestableHttpClient

How to use TestableHttpClient

The following code block shows the basic use case for asserting that certain requests are made:

TestableHttpMessageHandler testHandler = new();
HttpClient httpClient = new(testHandler); // or testHandler.CreateClient();

var result = await httpClient.GetAsync("http://httpbin.org/status/200");

testHandler.ShouldHaveMadeRequestsTo("https://httpbin.org/*");

The default response is an empty response message with a 200 OK StatusCode, in order to return real content the response need to be configured:

TestableHttpMessageHandler testHandler = new();
testHandler.RespondWith(Responses.Json(new { Hello: "World" }));
HttpClient httpClient = new(testHandler); // or testHandler.CreateClient();

var result = await httpClient.GetAsync("http://httpbin.org/status/200");

testHandler.ShouldHaveMadeRequestsTo("https://httpbin.org/*");

More examples can be found in the IntegrationTests project

Supported .NET versions

TestableHttpClient is build as a netstandard2.0 library, so theoretically it can work on every .NET version that support netstandard2.0. The following versions are being actively tested and thus supported:

• .NET Framework 4.6, 4.7 and 4.8
• .NET 6.0
• .NET 7.0

These versions are supported as long as Microsoft supports them, we do our best to test and support newer versions as soon as possible.

Contributing

Please read CONTRIBUTING.md for details on how you can help us out.

Versioning

We use SemVer for versioning. For the versions available, see the releases on this repository.

Note that currently every library will always be released when a new tag is created, even though it might not have any changes.

Authors

• David Perfors - dnperfors

See also the list of contributors who participated in this project.

License

This project is released under the MIT license, see LICENSE.md for more information.

Acknowledgments

This project is largely inspired by the HttpTest functionality from Flurl.
A lot of the ideas came from the thread about unit testing HttpClient code in this dotnet issue.