BATCH-891: Copied unit tests for AnnotationMethodResolver pulled from Spring Integration.

spring-batch-core/src/test/java/org/springframework/batch/core/configuration/xml/AnnotationMethodResolverTests.java

@@ -0,0 +1,101 @@
+/*
+ * Copyright 2002-2008 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.batch.core.configuration.xml;
+
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import java.lang.reflect.Method;
+
+import org.junit.Test;
+import org.springframework.batch.core.configuration.util.AnnotationMethodResolver;
+
+/**
+ * @author Mark Fisher
+ */
+public class AnnotationMethodResolverTests {
+
+	@Test
+	public void singleAnnotation() {
+		AnnotationMethodResolver resolver = new AnnotationMethodResolver(TestAnnotation.class);
+		Method method = resolver.findMethod(SingleAnnotationTestBean.class);
+		assertNotNull(method);
+	}
+
+	@Test(expected = IllegalArgumentException.class)
+	public void multipleAnnotations() {
+		AnnotationMethodResolver resolver = new AnnotationMethodResolver(TestAnnotation.class);
+		resolver.findMethod(MultipleAnnotationTestBean.class);
+	}
+
+	@Test
+	public void noAnnotations() {
+		AnnotationMethodResolver resolver = new AnnotationMethodResolver(TestAnnotation.class);
+		Method method = resolver.findMethod(NoAnnotationTestBean.class);
+		assertNull(method);
+	}
+
+
+	@Target(ElementType.METHOD)
+	@Retention(RetentionPolicy.RUNTIME)
+	private static @interface TestAnnotation {
+	}
+
+
+	private static class SingleAnnotationTestBean {
+
+		@TestAnnotation
+		public String upperCase(String s) {
+			return s.toUpperCase();
+		}
+
+		public String lowerCase(String s) {
+			return s.toLowerCase();
+		}
+	}
+
+
+	private static class MultipleAnnotationTestBean {
+
+		@TestAnnotation
+		public String upperCase(String s) {
+			return s.toUpperCase();
+		}
+
+		@TestAnnotation
+		public String lowerCase(String s) {
+			return s.toLowerCase();
+		}
+	}
+
+
+	private static class NoAnnotationTestBean {
+
+		public String upperCase(String s) {
+			return s.toUpperCase();
+		}
+
+		String lowerCase(String s) {
+			return s.toLowerCase();
+		}
+	}
+
+}