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au.com.dius.pact.provider:junit5spring 4.1.20
# Pact Spring/JUnit5 Support
This module extends the base [Pact JUnit5 module](/provider/junit5/README.md). See that for more details.
## Dependency
The combined library (JUnit5 + Spring) is available on maven central using:
group-id = au.com.dius.pact.provider
artifact-id = junit5spring
version-id = 4.1.x
## Usage
For writing Spring Pact verification tests with JUnit 5, there is an JUnit 5 Invocation Context Provider that you can use with
the `@TestTemplate` annotation. This will generate a test for each interaction found for the pact files for the provider.
To use it, add the `@Provider` and `@ExtendWith(SpringExtension.class)` and one of the pact source annotations to your test class (as per a JUnit 5 test), then
add a method annotated with `@TestTemplate` and `@ExtendWith(PactVerificationSpringProvider.class)` that
takes a `PactVerificationContext` parameter. You will need to call `verifyInteraction()` on the context parameter in
your test template method.
For example:
```java
@ExtendWith(SpringExtension.class)
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT)
@Provider("Animal Profile Service")
@PactBroker
public class ContractVerificationTest {
@TestTemplate
@ExtendWith(PactVerificationSpringProvider.class)
void pactVerificationTestTemplate(PactVerificationContext context) {
context.verifyInteraction();
}
}
```
You will now be able to setup all the required properties using the Spring context, e.g. creating an application
YAML file in the test resources:
```yaml
pactbroker:
host: your.broker.host
auth:
username: broker-user
password: broker.password
```
You can also run pact tests against `MockMvc` without need to spin up the whole application context which takes time
and often requires more additional setup (e.g. database). In order to run lightweight tests just use `@WebMvcTest`
from Spring and `MockMvcTestTarget` as a test target before each test.
For example:
```java
@WebMvcTest
@Provider("myAwesomeService")
@PactBroker
class ContractVerificationTest {
@Autowired
private MockMvc mockMvc;
@TestTemplate
@ExtendWith(PactVerificationInvocationContextProvider.class)
void pactVerificationTestTemplate(PactVerificationContext context) {
context.verifyInteraction();
}
@BeforeEach
void before(PactVerificationContext context) {
context.setTarget(new MockMvcTestTarget(mockMvc));
}
}
```
You can also use `MockMvcTestTarget` for tests without spring context by providing the controllers manually.
For example:
```java
@Provider("myAwesomeService")
@PactFolder("pacts")
class MockMvcTestTargetStandaloneMockMvcTestJava {
@TestTemplate
@ExtendWith(PactVerificationInvocationContextProvider.class)
void pactVerificationTestTemplate(PactVerificationContext context) {
context.verifyInteraction();
}
@BeforeEach
void before(PactVerificationContext context) {
MockMvcTestTarget testTarget = new MockMvcTestTarget();
testTarget.setControllers(new DataResource());
context.setTarget(testTarget);
}
@RestController
static class DataResource {
@GetMapping("/data")
@ResponseStatus(HttpStatus.NO_CONTENT)
void getData(@RequestParam("ticketId") String ticketId) {
}
}
}
```
**Important:** Since `@WebMvcTest` starts only Spring MVC components you can't use `PactVerificationSpringProvider`
and need to fallback to `PactVerificationInvocationContextProvider`
## Modifying requests
As documented in [Pact JUnit5 module](/provider/junit5/README.md#modifying-the-requests-before-they-are-sent), you can
inject a request object to modifiy the requests made. However, depending on the Pact test target you are using,
you need to use a different class.
| Test Target | Class to use |
|-------------|--------------|
| HttpTarget, HttpsTarget, SpringBootHttpTarget | org.apache.http.HttpRequest |
| MockMvcTestTarget | MockHttpServletRequestBuilder |
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