add tests for sample app functions

spring-cloud-function-samples/spring-cloud-function-sample/pom.xml

@@ -38,6 +38,11 @@
 			<artifactId>spring-boot-configuration-processor</artifactId>
 			<optional>true</optional>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 
 	<dependencyManagement>

spring-cloud-function-samples/spring-cloud-function-sample/src/test/java/com/example/SampleApplicationTests.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2016 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 com.example;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.List;
+
+import org.junit.Test;
+
+import reactor.core.publisher.Flux;
+
+public class SampleApplicationTests {
+
+	private final SampleApplication functions = new SampleApplication();
+
+	@Test
+	public void testUppercase() {
+		Flux<String> output = functions.uppercase().apply(Flux.just("foo", "bar"));
+		List<String> results = output.collectList().block();
+		assertEquals(2, results.size());
+		assertEquals("FOO", results.get(0));
+		assertEquals("BAR", results.get(1));
+	}
+
+	@Test
+	public void testLowercase() {
+		Flux<String> output = functions.lowercase().apply(Flux.just("FOO", "BAR"));
+		List<String> results = output.collectList().block();
+		assertEquals(2, results.size());
+		assertEquals("foo", results.get(0));
+		assertEquals("bar", results.get(1));		
+	}
+
+	@Test
+	public void testWords() {
+		Flux<String> output = functions.words().get();
+		List<String> results = output.collectList().block();
+		assertEquals(2, results.size());
+		assertEquals("foo", results.get(0));
+		assertEquals("bar", results.get(1));	
+	}
+}