Testing AspnetCore Projects with Alba

preamble

In the AspnetCore ecosystem, we test our projects using the(used form a nominal expression)TestServer NET6 provides.(used form a nominal expression)WebApplicationFactoryThe latter is a wrapper around the former and is specifically designed for testing Core applications. It simplifies the process of creating and configuring test servers. AndAlbaIt is also based on the former package, and also provides some good testing experience.

Integration Testing with Alba

Here's a taste of some of TA's great test experiences:.

First, you need to install the Alba package in your project. This can be done via the NuGet package manager using the following command:

dotnet add package Alba

To demonstrate the use of Alba, we first create a simple Core application. This application contains a MinimalApi request that returns "Hello, World!

var builder = (args);
var app = ();
("/", () => "Hello, World!");
();

namespace TestCase
{
    public partial class Program { } //Define an entry point for testing
}

Next, we'll use Alba to create an application based on thexUnitof integration tests that test the above applications.

using Alba;
public class IntegrationTests
{
    [Fact]
    public async Task Get_Home_Returns_HelloWorld()
    {
        using var host = await <>(builder =>
        {
            // Here you can configure services and middleware
        });
        await (scenario =>
        {
            ("/");
            ();
            ("Hello, World!");
        });
    }
}

AlbaHost has a methodScenario(x=>{})Used to define test scenarios, such as the above test case, the scenario uses GET to request the start page and asserts whether it is returned.200, and whether the returned text isHello, World!

For assertions that are not supported by the built-in scenarios, we can also use parameters to receive theIScenarioResultSelf-assertion.

var myScenario = await _host.Scenario(_ =>
{
    _.("/");
});
("true", ());
(200, );

For POST and other ways to provide a chained syntax style, Alba will automatically serialize it for us.

using Alba;
public class IntegrationTests
{
    [Fact]
    public async Task Post_Data_Returns_Correct_Response()
    {
        using var host = await <>();
        await (scenario =>
        {
            (new { Name = "Test" }).ToUrl("/data");
            ();
            ("Received: Test");
        });
    }
}

insofar asXmlcap (a poem)FormDataThe POST, theScenarioSupport is also provided, for example.

//xml
(new Input {Name = "vipwan", Age = 18});
//form
public async Task write_form_data(IAlbaHost system)
{
    var form1 = new Dictionary<string, string>
    {
        ["a"] = "what?",
        ["b"] = "now?",
        ["c"] = "really?"
    };
    await (_ =>
    {
        // This writes the dictionary values to the HTTP
        // request as form data, and sets the content-length
        // header as well as setting the content-type
        // header to application/x-www-form-urlencoded
        _.WriteFormData(form1);
    });
}

Of course, in addition to automatic serialization when passing parameters, Alba also provides deserialization support for response returns.

public async Task read_json(IAlbaHost host)
{
    var result = await (_ =>
    {
        _.("/output");
    });
    var output = <Output>();
}
//or
public async Task read_json_shorthand(IAlbaHost host)
{
    var output = await <Output>("/output");
}

If we need to test requests that require authentication, Alba has done that for us. All we need to do is instantiate theAuthenticationStuborJwtSecurityStubOr to realizeOpenConnectExtension, then just pass it in when instantiating AlbaHost!

var securityStub = new AuthenticationStub()
    .With("foo", "bar")//Demo addedclaim
    .With(, "vipwan@")//Demo addedclaim
    .WithName("vipwan");
myHost = await <>(securityStub);

As in the code above as long as we use themyHostAny scenario created by the instance will automatically have the appropriate authentication information attached: the

// It also passes the test when the request requires authentication
("/", () => "Hello, World!").RequireAuthorization();

Alba also supports AOP for requests, for example, before and after the request, we need to make theHttpContextMake some changes.

public void sample_usage(AlbaHost system)
{
    // Synchronously
    (context =>
    {
        // Modify the HttpContext immediately before each
        // Scenario()/HTTP request is executed
        ("trace", "something");
    });
    (context =>
    {
        // perform an action immediately after the scenario/HTTP request
        // is executed
    });
    // Asynchronously
    (context =>
    {
        // do something asynchronous here
        return ;
    });
    (context =>
    {
        // do something asynchronous here
        return ;
    });
}

Here are some of the features of Alba and the way to use, of course, is not perfect, if you are interested in this library you canclick on a linkCheck out the official documentation

summarize

Alba provides a variety of convenient testing methods that make writing and executing integration tests easier and more efficient. Whether it's basic HTTP request testing, request testing with dependency injection, POST request testing, request testing with authentication, or complex request and response testing, Alba has you covered. With Alba, it's easier than ever to write reliable integration tests that ensure your application works in every situation.