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dotnet-integration-tested

dotnet workflow

This repository contains the demo application used for a lecture: "Building Modern and Reliable .NET Solutions Through Integration Testing" which will be first presented on advtechdays.com Conference in Dec 2024.

Lecture summary

Presentation link: https://slides.com/vmandic/dotnet-integration-tested

In today’s fast-paced software landscape, developing reliable solutions goes beyond writing code—it’s about building a robust test suite from the start, maintaining it, and nourishing a wholesome testing culture across the team. In this demo-focused session, we will explore how to craft modern .NET solutions with confidence, leveraging integration tests to ensure stability across database interactions, external and internal services, and business logic.

We will build a few complex tests for a rudimental SEO keyword rank tracking solution. You’ll see how > integration tests help simulate real-world conditions using tools like database fake data factories and HTTP > client interception to mock external APIs. The tools in the discussion will be TestServer, Docker, Moq, > TestContainers, and XUnit (with parallelization) emphasizing how a solid testing culture ensures long-term > reliability.

By the end of this session, you’ll understand the importance of starting tests early, how to effectively > integrate databases and external services in tests, and how a well-designed testing suite can make your .NET > solutions more resilient and maintainable. This is not just a presentation—it's a live demonstration of the > power of integration tests in action.

It is never too late to add tests to your codebase, and this presentation will surely encourage or at least inspire you to do so.

Project and lecture goal

Demonstrate how to build a web-based system with multiple interdependent components and storage services whilst having each of its parts unit and integration tested.

Prerequirements

  • .NET SDK 7.0.203 as set up in global.json and NuGet deps relying on it.
  • Docker engine as we use Testcontainers library to start up the infrastructure in tests

How to build

dotnet build in git repository root to build the whole solution.

How to test

dotnet test will run both unit tests and integration tests.

How to use

Set up the appsettings.json for required WincherAuth and WincherApi configs.

# signup
curl --location 'http://localhost:5055/signup' \
--header 'Content-Type: application/json' \
--data '{
    "Username": "test2",
    "Password": "test"
}'

# login
curl --location 'http://localhost:5065/login' \
--header 'Content-Type: application/json' \
--data '{
    "Username": "test2",
    "Password": "test"
}'

# Check if authorized
curl --location 'http://localhost:5055/check-auth' \
--header 'Authorization: Bearer eyJhbG...'

# Make SEO check
curl --location 'http://localhost:5055/seo-check' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer eyJhbG...' \
--data '{
    "Url": "http://www.advtechdays.com",
    "Keywords": ["technology"]
}'

# Read all checks
curl --location 'http://localhost:5055/seo-checks' \
 --header 'Authorization: Bearer eyJhbG...'
 
# Read a specific SEO check
curl --location 'http://localhost:5055/seo-check/67484a730f012a66a82b6e76' \
 --header 'Authorization: Bearer eyJhbG...'