WebApplicationFactory
WebApplicationFactory is an ASP.NET Core testing API that bootstraps an application in an in-memory host and provides clients for functional and integration testing.
ASP.NET Core in Action, 3e
WebApplicationFactory is an ASP.NET Core testing API that bootstraps an application for in-memory functional and integration testing and permits test-specific customization.
- How it is used
- Tests a real ASP.NET Core application through in-memory HTTP requests and its configured framework pipeline.
- How deep it goes
- Explains setup, request verification, service replacement, and custom factories, but defers database-specific testing to a separate treatment.
- Examples
- Demonstrates GET /ping returning pong and a currency endpoint using a stub converter that returns 3.
- What you can do after
- Apply it via Microsoft.AspNetCore.Mvc.Testing to verify endpoints and substitute test services without starting an external server.
Read how ASP.NET Core in Action, 3e explains WebApplicationFactory →
.NET in Action, Second Edition
WebApplicationFactory is an ASP.NET Core testing API that creates an in-memory application host and a client for sending requests to it.
- How it is used
- Exercises an ASP.NET Core API across configuration, dependency injection, HTTP routing, and application logic without leaving the test process.
- How deep it goes
- Explains host creation, client-start timing, service replacement, environment selection, and response assertions, but not framework internals.
- Examples
- Uses a ComicFinderService, a fake external HTTP handler, and a search request whose JSON response is checked for one comic.
- What you can do after
- Diagnose integration behavior by sending real HTTP-style requests through a configured in-memory application and asserting complete responses.
Read how .NET in Action, Second Edition explains WebApplicationFactory →
Related concepts
- HTTP clientproduces · An HTTP client is software or an API component that sends HTTP requests and receives and processes HTTP responses.
- api calluses · An API call is a programmatic request or invocation through an application programming interface to access data or invoke an operation.
- TestServeruses · TestServer is an ASP.NET Core in-memory server that accepts test requests and returns responses without requiring a network server.
- IClassFixture<TFixture>used by · IClassFixture<TFixture> is an xUnit interface that provides one shared fixture instance to the tests in a class.
- integration testused by · An integration test evaluates whether multiple software components, or a component and an external dependency, interact and behave correctly together.
- contractuses · An API contract is a specification of the operations, data, and behavioral expectations that govern interactions between software components.
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