Added support for writing contracts in Java

fixes gh-1161

samples/standalone/dsl/http-client/src/test/java/com/example/loan/TestControllerTests.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2013-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.loan;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.cloud.contract.stubrunner.spring.AutoConfigureStubRunner;
+import org.springframework.cloud.contract.stubrunner.spring.StubRunnerPort;
+import org.springframework.cloud.contract.stubrunner.spring.StubRunnerProperties;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.web.client.RestTemplate;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+// tag::autoconfigure_stubrunner[]
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = WebEnvironment.NONE)
+@AutoConfigureStubRunner(ids = {
+		"com.example:http-server-dsl:+:stubs:6565"}, stubsMode = StubRunnerProperties.StubsMode.LOCAL)
+public class TestControllerTests {
+	// end::autoconfigure_stubrunner[]
+
+	@StubRunnerPort("http-server-dsl")
+	int port;
+
+	@Test
+	public void should_work_with_java_dsl() {
+		// when:
+		ResponseEntity<String> response = new RestTemplate()
+				.getForEntity("http://localhost:" + this.port + "/example", String.class);
+		// then:
+		assertThat(response.getStatusCodeValue()).isEqualTo(200);
+	}
+
+}