Update exercise and answer ServeEvent listener, add example

Author: basdijkstra

src/test/java/answers/WireMockAnswers7dot3Test.java

@@ -61,9 +61,9 @@ public void anIncomingLoanRequestShouldTriggerAConsoleLogMessage() {
 
         given().
                 spec(requestSpec).
-                when().
+        when().
                 post("/requestLoan").
-                then().
+        then().
                 assertThat().
                 statusCode(201);
     }

src/test/java/answers/extensions/LogRequestWithTimestamp.java

@@ -14,6 +14,11 @@ public String getName() {
         return "log-loan-request-with-timestamp";
     }
 
+    @Override
+    public boolean applyGlobally() {
+        return false;
+    }
+
     @Override
     public void afterComplete(ServeEvent serveEvent, Parameters parameters) {
 

src/test/java/examples/extensions/DatabaseWriter.java

@@ -0,0 +1,26 @@
+package examples.extensions;
+
+import com.github.tomakehurst.wiremock.extension.Parameters;
+import com.github.tomakehurst.wiremock.extension.ServeEventListener;
+import com.github.tomakehurst.wiremock.stubbing.ServeEvent;
+
+public class DatabaseWriter implements ServeEventListener {
+
+    @Override
+    public String getName() {
+        return "database-writer";
+    }
+
+    @Override
+    public boolean applyGlobally() {
+        return false;
+    }
+
+    @Override
+    public void afterComplete(ServeEvent serveEvent, Parameters parameters) {
+
+        String database = parameters.getString("database");
+
+        System.out.println("Writing to database: " + database);
+    }
+}

src/test/java/examples/usingextensions/DatabaseWriterTest.java

@@ -0,0 +1,64 @@
+package examples.usingextensions;
+
+import com.github.tomakehurst.wiremock.extension.Parameters;
+import com.github.tomakehurst.wiremock.junit5.WireMockExtension;
+import examples.extensions.BodyLengthMatcher;
+import examples.extensions.DatabaseWriter;
+import io.restassured.builder.RequestSpecBuilder;
+import io.restassured.specification.RequestSpecification;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import static com.github.tomakehurst.wiremock.client.WireMock.*;
+import static com.github.tomakehurst.wiremock.core.WireMockConfiguration.wireMockConfig;
+import static io.restassured.RestAssured.given;
+
+public class DatabaseWriterTest {
+
+    private RequestSpecification requestSpec;
+
+    @RegisterExtension
+    static WireMockExtension wiremock = WireMockExtension.newInstance().
+            options(wireMockConfig().
+                    port(9876).
+                    extensions(new DatabaseWriter())
+            ).build();
+
+    @BeforeEach
+    public void createRequestSpec() {
+
+        requestSpec = new RequestSpecBuilder().
+                setBaseUri("http://localhost").
+                setPort(9876).
+                build();
+    }
+
+    public void stubForServeEventListener() {
+
+        Map<String, Object> params = new HashMap<>();
+        params.put("database", "requestsDB");
+
+        wiremock.stubFor(get(urlEqualTo("/serve-event")).
+                withServeEventListener("database-writer", Parameters.from(params)).
+                willReturn(aResponse().withStatus(200))
+        );
+    }
+
+    @Test
+    public void sendRequest_shouldWriteRequestToDatabaseAfterServeIsComplete() {
+
+        stubForServeEventListener();
+
+        given().
+                spec(requestSpec).
+        when().
+                get("/serve-event").
+        then().
+                assertThat().
+                statusCode(200);
+    }
+}