Merge pull request #2165 from tomekl007/BAEL-981_pact

BAEL-981 pact article code

libraries/pom.xml

@@ -350,6 +350,17 @@
             <artifactId>java-lsh</artifactId>
             <version>${java-lsh.version}</version>
         </dependency>
+        <dependency>
+            <groupId>au.com.dius</groupId>
+            <artifactId>pact-jvm-consumer-junit_2.11</artifactId>
+            <version>${pact.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.codehaus.groovy</groupId>
+            <artifactId>groovy-all</artifactId>
+            <version>2.4.10</version>
+        </dependency>
     </dependencies>
     <properties>
         <multiverse.version>0.7.0</multiverse.version>
@@ -379,6 +390,7 @@
         <commons.collections.version>4.1</commons.collections.version>
         <junit.version>4.12</junit.version>
         <java-lsh.version>0.10</java-lsh.version>
+        <pact.version>3.5.0</pact.version>
     </properties>
 
 </project>

libraries/src/test/java/com/baeldung/pact/PactConsumerDrivenContractUnitTest.java

@@ -0,0 +1,82 @@
+package com.baeldung.pact;
+
+
+import au.com.dius.pact.consumer.Pact;
+import au.com.dius.pact.consumer.PactProviderRuleMk2;
+import au.com.dius.pact.consumer.PactVerification;
+import au.com.dius.pact.consumer.dsl.PactDslWithProvider;
+import au.com.dius.pact.model.RequestResponsePact;
+import org.junit.Rule;
+import org.junit.Test;
+import org.springframework.http.*;
+import org.springframework.web.client.RestTemplate;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class PactConsumerDrivenContractUnitTest {
+
+    @Rule
+    public PactProviderRuleMk2 mockProvider
+            = new PactProviderRuleMk2("test_provider", "localhost", 8080, this);
+
+    @Pact(consumer = "test_consumer")
+    public RequestResponsePact createPact(PactDslWithProvider builder) {
+        Map<String, String> headers = new HashMap<String, String>();
+        headers.put("Content-Type", "application/json");
+
+        return builder
+                .given("test GET ")
+                .uponReceiving("GET REQUEST")
+                    .path("/")
+                    .method("GET")
+                .willRespondWith()
+                    .status(200)
+                    .headers(headers)
+                    .body("{\"condition\": true, \"name\": \"tom\"}")
+                .given("test POST")
+                .uponReceiving("POST REQUEST")
+                    .method("POST")
+                    .headers(headers)
+                    .body("{\"name\": \"Michael\"}")
+                    .path("/create")
+                .willRespondWith()
+                    .status(201)
+                    .headers(headers)
+                    .body("")
+                .toPact();
+    }
+
+
+    @Test
+    @PactVerification()
+    public void givenGet_whenSendRequest_shouldReturn200WithProperHeaderAndBody() {
+        //when
+        ResponseEntity<String> response
+                = new RestTemplate().getForEntity(mockProvider.getUrl(), String.class);
+
+        //then
+        assertThat(response.getStatusCode().value()).isEqualTo(200);
+        assertThat(response.getHeaders().get("Content-Type").contains("application/json")).isTrue();
+        assertThat(response.getBody()).contains("condition", "true", "name", "tom");
+
+        //and
+        HttpHeaders httpHeaders = new HttpHeaders();
+        httpHeaders.setContentType(MediaType.APPLICATION_JSON);
+        String jsonBody = "{\"name\": \"Michael\"}";
+
+        //when
+        ResponseEntity<String> postResponse = new RestTemplate().exchange(
+                mockProvider.getUrl() + "/create",
+                HttpMethod.POST,
+                new HttpEntity<>(jsonBody, httpHeaders),
+                String.class
+        );
+
+        //then
+        assertThat(postResponse.getStatusCode().value()).isEqualTo(201);
+    }
+
+}