Add hellowebflux-method sample

Fixes gh-4503

samples/javaconfig/hellowebflux-method/src/integration-test/java/sample/HelloWebfluxMethodApplicationITests.java

@@ -0,0 +1,105 @@
+/*
+ * Copyright 2002-2017 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
+ *
+ *      http://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 sample;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpStatus;
+import org.springframework.security.web.server.header.ContentTypeOptionsHttpHeadersWriter;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.TestPropertySource;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.reactive.server.ExchangeResult;
+import org.springframework.test.web.reactive.server.WebTestClient;
+import org.springframework.web.reactive.function.client.ExchangeFilterFunction;
+
+import java.nio.charset.Charset;
+import java.time.Duration;
+import java.util.Base64;
+import java.util.Map;
+import java.util.function.Consumer;
+
+import static org.springframework.web.reactive.function.client.ExchangeFilterFunctions.Credentials.basicAuthenticationCredentials;
+import static org.springframework.web.reactive.function.client.ExchangeFilterFunctions.basicAuthentication;
+
+/**
+ * @author Rob Winch
+ * @since 5.0
+ */
+@RunWith(SpringRunner.class)
+@ContextConfiguration(classes = HelloWebfluxMethodApplication.class)
+@TestPropertySource(properties = "server.port=0")
+public class HelloWebfluxMethodApplicationITests {
+	@Value("#{@nettyContext.address().getPort()}")
+	int port;
+
+	WebTestClient rest;
+
+	@Before
+	public void setup() {
+		this.rest = WebTestClient.bindToServer()
+				.filter(basicAuthentication())
+				.responseTimeout(Duration.ofDays(1))
+				.baseUrl("http://localhost:" + this.port)
+				.build();
+	}
+
+	@Test
+	public void messageWhenNotAuthenticated() throws Exception {
+		this.rest
+			.get()
+			.uri("/message")
+			.exchange()
+			.expectStatus().isUnauthorized();
+	}
+
+	@Test
+	public void messageWhenUserThenForbidden() throws Exception {
+		this.rest
+			.get()
+			.uri("/message")
+			.attributes(robsCredentials())
+			.exchange()
+			.expectStatus().isEqualTo(HttpStatus.FORBIDDEN)
+			.expectBody().isEmpty();
+	}
+
+	@Test
+	public void messageWhenAdminThenOk() throws Exception {
+		this.rest
+			.get()
+			.uri("/message")
+			.attributes(adminCredentials())
+			.exchange()
+			.expectStatus().isOk()
+			.expectBody(String.class).isEqualTo("Hello World!");
+	}
+
+	private Consumer<Map<String, Object>> robsCredentials() {
+		return basicAuthenticationCredentials("rob","rob");
+	}
+
+	private Consumer<Map<String, Object>> adminCredentials() {
+		return basicAuthenticationCredentials("admin","admin");
+	}
+
+	private String base64Encode(String value) {
+		return Base64.getEncoder().encodeToString(value.getBytes(Charset.defaultCharset()));
+	}
+}