Add auto-config for spring-security-oauth2-client

Closes gh-10497

spring-boot-samples/spring-boot-sample-oauth2-client/src/test/main/java/sample/oauth2/client/SampleOAuth2ClientApplicationTests.java

@@ -0,0 +1,51 @@
+package sample.oauth2.client;
+
+import java.net.URI;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Integration tests for an OAuth2 client application.
+ *
+ * @author Madhura Bhave
+ */
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+@DirtiesContext
+public class SampleOAuth2ClientApplicationTests {
+
+	@LocalServerPort
+	private int port;
+
+	@Autowired
+	private TestRestTemplate restTemplate;
+
+	@Test
+	public void everythingShouldRedirectToLogin() throws Exception {
+		ResponseEntity<String> entity = this.restTemplate.getForEntity("/", String.class);
+		assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.FOUND);
+		assertThat(entity.getHeaders().getLocation())
+				.isEqualTo(URI.create("http://localhost:" + this.port + "/login"));
+	}
+
+	@Test
+	public void loginShouldHaveBothOAuthClientsToChooseFrom() throws Exception {
+		ResponseEntity<String> entity = this.restTemplate.getForEntity("/login", String.class);
+		assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.OK);
+		assertThat(entity.getBody()).contains("/oauth2/authorization/code/github-client-1");
+		assertThat(entity.getBody()).contains("/oauth2/authorization/code/github-client-2");
+	}
+
+}