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Learn to build robust RESTFUL API Clients, Service Virtualization in Java and SpringBoot applications using WireMock.
Updated on Sep, 2026
Programming, Programming Languages, Java
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WireMock is a simulator for HTTP-based APIs or MockServer.
REST APIs are everywhere today, as it's the modern and easiest way to build functionality and expose it to the real world.
When it comes to writing Unit Test Cases that involve REST-based interactions, there is always a challenge in testing error responses, network faults, latency, and timeouts . WireMock is going to solve this problem of the application code that depends on the external service by mocking the actual service.
In MicroServices Architecture , It is pretty common for services to depend on one another and it's always a challenge to write test cases for the code that depends on other external services . WireMock provides the necessary tools to simulate an external service so the code that depends on the external service can be tested, which helps to build a robust REST client.
This course is going to cover the techniques that are listed below using WireMock:
Service Virtualization
Simulating the External Service
Simulating Error response
Simulating Network errors
Learn to integrate the most powerful HTTP mock library, WireMock, into your application to build resilient and robust REST API clients.
If your application depends on an API that does not exist but still would like to build the REST client, then WireMock can help support that kind of development.
If you want to cover all the edge cases scenarios, such as NetWork Errors, Faults, Latency, and RunTime Exceptions, in your REST client, then start using WireMock
If you would like to write Unit Test cases that cover all the possible scenarios that can happen in a REST-based interaction, then start using WireMock.
In a MicroServices architecture, it is pretty common for your services to depend on each other. WireMock is a powerful simulation tool to simulate the service that your application depends on. In a nutshell, WireMock is a Service Virtualization tool.
Introduction to WireMock
Learn to build a REST client using the Spring WebClient.
Learn to virtualize an External Service
Learn to create Stubs using WireMock
Learn to simulate network errors, latency, network timeouts, and more.
Learn to run WireMock using JUnit4 and JUnit5 platform
Learn to integrate and run WireMock in the Spring Boot application
Check out the detailed breakdown of what’s inside the course
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