Added checkstyle

spring-cloud-config-sample/src/test/java/sample/ApplicationFailFastTests.java

@@ -1,25 +1,43 @@
+/*
+ * Copyright 2018-2019 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
+ *
+ *      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.Test;
+
 import org.springframework.boot.builder.SpringApplicationBuilder;
 
-import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.fail;
 
 public class ApplicationFailFastTests {
 
 	@Test
 	public void contextFails() {
-        try {
-            new SpringApplicationBuilder()
-                    .sources(Application.class)
-                    .run("--server.port=0", "--spring.cloud.config.enabled=true", 
-                            "--spring.cloud.config.fail-fast=true",
-                            "--spring.cloud.config.uri=http://server-host-doesnt-exist:1234");
-            fail("failFast option did not produce an exception");
-        } catch (Exception e) {
-            assertTrue("Exception not caused by fail fast", e.getMessage().contains("fail fast"));
-        }
-    }
+		try {
+			new SpringApplicationBuilder().sources(Application.class).run(
+					"--server.port=0", "--spring.cloud.config.enabled=true",
+					"--spring.cloud.config.fail-fast=true",
+					"--spring.cloud.config.uri=http://server-host-doesnt-exist:1234");
+			fail("failFast option did not produce an exception");
+		}
+		catch (Exception e) {
+			assertThat(e.getMessage().contains("fail fast"))
+					.as("Exception not caused by fail fast").isTrue();
+		}
+	}
 
 }