This document discusses mocking REST APIs with Wiremock. It provides an overview of why and when APIs are mocked, how to install and use Wiremock to mock APIs, and demos of running Wiremock both standalone and integrated with test code. Key points covered include simulating unavailable or error-prone services for testing, installing Wiremock via Maven or Gradle, configuring Wiremock stubs and mappings, and viewing mocked request histories and mappings in the Wiremock admin interface.

1. Rest APIs mocking with Wiremock
GLOBANT
TAE WEEK </>

2. ● What the Mock?
● Why mocking API?
● When mocking API?
● Wiremock
○ Installing
○ Stubs
● Demo stand alone
● Demo code
AGENDA

3. What The
Mock?
mockable.io

4. WHY TO
MOCK
● Simulate not available services/rest API
● Stable service
● Simulate errors

5. WHEN TO
MOCK
External APIs
● Authentication
● Rights
● Send requests, alerts, emails

6. WireMock
Mock your APIs for fast, robust and comprehensive testing
WireMock is a simulator for HTTP(S)-based APIs. Some might consider it a service virtualization tool
or a mock server.

7. INSTALLING
Maven
Standard WireMock JAR
<dependency>
<groupId>com.github.tomakehurst</groupId>
<artifactId>wiremock</artifactId>
<version>2.19.0</version>
<scope>test</scope>
</dependency>
Or standalone JAR
<dependency>
<groupId>com.github.tomakehurst</groupId>
<artifactId>wiremock-standalone</artifactId>
<version>2.19.0</version>
</dependency>
Gradle
Standard WireMock JAR
testCompile "com.github.tomakehurst:wiremock:2.19.0"
Or standalone JAR
testCompile "com.github.tomakehurst:wiremock-standalone:2.19.0"

8. JUnit 4.x
import static com.github.tomakehurst.wiremock.client.WireMock.*;
@Rule
public WireMockRule wireMockRule = new WireMockRule(8089);
// No-args constructor defaults to port 8080

9. Non-JUnit and
general Java
usage
WireMockServer wireMockServer = new WireMockServer(wireMockConfig().port(8089));
//No-args constructor will start on port 8080, no HTTPS
wireMockServer.start();
//WireMock.configureFor("wiremock.host", 8089); //Change the port
//WireMock.configureFor("tomcat.host", 8080, "/wiremock"); //General path
// Do some stuff
WireMock.reset();
// Finish doing stuff
wireMockServer.stop();

10. Demo with
stand alone
To run: java -jar wiremock-standalone-2.19.0.jar
To see the history: http://localhost:8080/__admin/requests
To see the mappings: http://localhost:8080/__admin/mappings
Wiremock client

11. Demo with code
Webhooks
Event
generator A
Event
generator B
Send alerts
Method: POST
Server: alert_server
Path: /alert
Method: POST
Server: webhook
Path: /events

12. Thank you!