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Streamlining API Integration and Testing: A Guide to Implementing OpenAPI Generator and WireMock
Speed up API integration and testing! Use OpenAPI Generator to create client code & WireMock stubs from your API specs. Ensure proper code coverage and avoid unwieldy mocks.
The OpenAPI Generator provides an integrated solution for generating client-side code and WireMock stubs. This will accelerate developers by providing the tools needed to integrate with APIs and the means to conduct integration testing by leveraging stubs. The latter is important to ensure proper code coverage. Furthermore, when developing in the Spring Boot ecosystem, the Spring Boot Test ensures a fully loaded context connecting to a live HTTP endpoint, which may not be achievable via mock libraries. Employing mock libraries tends to become unwieldy to maintain and may lead to pretense that the code is well tested, but when loaded with other layers may break.
This post is a step-by-step guide to implementing OpenAPI Generator to create the WireMock classes. By using OpenAPI specifications, developers can generate consistent stubs and client code that align with the API’s contract.
This guideline extends from this post’s sample and code:
The following dependencies are needed for enabling JUnit, WireMock, and RestAssured:
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-api</artifactId>
<version>5.11.4</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<version>3.4.2</version>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-contract-wiremock</artifactId>
<version>4.2.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.wiremock</groupId>
<artifactId>wiremock-standalone</artifactId>
<version>3.11.0</version>
</dependency>
<dependency>
<groupId>io.rest-assured</groupId>…
