BATCH-1027: Created test class for PassThroughFieldExtractor

spring-batch-infrastructure/src/test/java/org/springframework/batch/item/file/transform/PassThroughFieldExtractorTests.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2006-2007 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.item.file.transform;
+
+import static junit.framework.Assert.*;
+
+import java.util.Arrays;
+import java.util.List;
+
+import org.junit.Test;
+
+/**
+ * @author Dan Garrette
+ * @since 2.0
+ */
+public class PassThroughFieldExtractorTests {
+
+	@Test
+	public void testExtract_string() {
+		PassThroughFieldExtractor<String> extractor = new PassThroughFieldExtractor<String>();
+		Object[] result = extractor.extract("abc");
+		assertTrue(Arrays.equals(new Object[] { "abc" }, result));
+	}
+
+	@Test
+	public void testExtract_array() {
+		PassThroughFieldExtractor<String[]> extractor = new PassThroughFieldExtractor<String[]>();
+		Object[] result = extractor.extract(new String[] { "a", "b", null, "d" });
+		assertTrue(Arrays.equals(new Object[] { "a", "b", "", "d" }, result));
+	}
+
+	@Test
+	public void testExtract_collection() {
+		PassThroughFieldExtractor<List<String>> extractor = new PassThroughFieldExtractor<List<String>>();
+		Object[] result = extractor.extract(Arrays.asList("a", "b", null, "d"));
+		assertTrue(Arrays.equals(new Object[] { "a", "b", "", "d" }, result));
+	}
+}