Add websocket-authentication sample

websocket-authentication/src/test/java/com/example/greeting/GreetingApplicationTests.java

@@ -0,0 +1,57 @@
+package com.example.greeting;
+
+import java.net.URI;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import reactor.core.publisher.Flux;
+import reactor.test.StepVerifier;
+
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.server.LocalServerPort;
+import org.springframework.graphql.test.tester.GraphQlTester;
+import org.springframework.graphql.test.tester.WebSocketGraphQlTester;
+import org.springframework.web.reactive.socket.client.ReactorNettyWebSocketClient;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+class GreetingApplicationTests {
+
+	@LocalServerPort
+	private int port;
+
+	@Value("http://localhost:${local.server.port}${spring.graphql.websocket.path}")
+	private String baseUrl;
+
+	private GraphQlTester graphQlTester;
+
+
+	@BeforeEach
+	void setUp() {
+		URI url = URI.create(baseUrl);
+		this.graphQlTester = WebSocketGraphQlTester.builder(url, new ReactorNettyWebSocketClient())
+				.interceptor(JwtGraphQlClientInterceptor.create())
+				.build();
+	}
+
+	@Test
+	void greeting() {
+		this.graphQlTester.document("{greeting}")
+				.execute()
+				.path("greeting")
+				.entity(String.class).isEqualTo("Hello Markey!");
+	}
+
+	@Test
+	void greetings() {
+		Flux<String> flux = this.graphQlTester.document("subscription {greetings}")
+				.executeSubscription()
+				.toFlux("greetings", String.class);
+
+		StepVerifier.create(flux)
+				.expectNext("Hello Markey0!", "Hello Markey1!", "Hello Markey2!", "Hello Markey3!")
+				.thenCancel()
+				.verify();
+	}
+
+}