Add test and fix type inspection for scanned functions

Fixes gh-73

spring-cloud-function-web/src/test/java/org/springframework/cloud/function/scan/ComponentTests.java

@@ -0,0 +1,87 @@
+/*
+ * Copyright 2012-2015 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 org.springframework.cloud.function.scan;
+
+import java.net.URI;
+import java.util.function.Function;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.context.embedded.LocalServerPort;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.RequestEntity;
+import org.springframework.http.ResponseEntity;
+import org.springframework.stereotype.Component;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import reactor.core.publisher.Flux;
+
+/**
+ * @author Dave Syer
+ *
+ */
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = WebEnvironment.RANDOM_PORT)
+public class ComponentTests {
+
+	@LocalServerPort
+	private int port;
+	@Autowired
+	private Greeter greeter;
+	@Autowired
+	private TestRestTemplate rest;
+
+	@Test
+	public void contextLoads() throws Exception {
+		assertThat(greeter).isNotNull();
+	}
+
+	@Test
+	public void greeter() throws Exception {
+		ResponseEntity<String> result = rest
+				.exchange(
+						RequestEntity.post(new URI("/greeter"))
+								.contentType(MediaType.TEXT_PLAIN).body("World"),
+						String.class);
+		assertThat(result.getStatusCode()).isEqualTo(HttpStatus.OK);
+		assertThat(result.getBody()).isEqualTo("Hello World");
+	}
+
+	@SpringBootApplication
+	@ComponentScan
+	protected static class TestConfiguration {
+	}
+
+	@Component("greeter")
+	protected static class Greeter implements Function<Flux<String>, Flux<String>> {
+		@Override
+		public Flux<String> apply(Flux<String> flux) {
+			return flux.map(name -> "Hello " + name);
+		}
+	}
+
+}