GH-258 Polishing around duplicqte registration

Removwd formatter plugin
Added additional test

Resolves #258
Resolves #259

spring-cloud-function-context/src/test/java/org/springframework/cloud/function/context/HybridFunctionalRegistrationTests.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2019-2019 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 org.springframework.cloud.function.context;
+
+import java.util.function.Function;
+
+import org.junit.Test;
+
+import org.springframework.boot.SpringBootConfiguration;
+import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
+import org.springframework.boot.autoconfigure.jackson.JacksonAutoConfiguration;
+import org.springframework.cloud.function.context.config.ContextFunctionCatalogAutoConfiguration;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.Bean;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ *
+ * @author Oleg Zhurakousky
+ *
+ */
+public class HybridFunctionalRegistrationTests {
+
+	// see https://github.com/spring-cloud/spring-cloud-function/issues/258
+	@Test
+	public void testNoDoubleRegistrationInHybridMode() {
+		ConfigurableApplicationContext context = FunctionalSpringApplication
+				.run(UppercaseFunction.class, "--spring.functional.enabled=false");
+		assertThat(context.containsBean("function")).isTrue();
+		assertThat(context.getBeansOfType(UppercaseFunction.class).size()).isEqualTo(1);
+	}
+
+	@SpringBootConfiguration
+	@ImportAutoConfiguration({
+		ContextFunctionCatalogAutoConfiguration.class,
+		JacksonAutoConfiguration.class }
+	)
+	public static class UppercaseFunction implements Function<String, String> {
+
+		@Override
+		public String apply(String t) {
+			System.out.println("Receoved " + t);
+			return t;
+		}
+
+		@Bean
+		public Function<String, String> foo() {
+			return x -> x;
+		}
+	}
+
+}