1 files changed, 77 insertions, 0 deletions
diff --git a/feature-pooling-dmaap/src/test/java/org/onap/policy/drools/pooling/extractor/FieldExtractorTest.java b/feature-pooling-dmaap/src/test/java/org/onap/policy/drools/pooling/extractor/FieldExtractorTest.java
new file mode 100644
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--- /dev/null
+++ b/feature-pooling-dmaap/src/test/java/org/onap/policy/drools/pooling/extractor/FieldExtractorTest.java
@@ -0,0 +1,77 @@
+/*
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2018 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.drools.pooling.extractor;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+import java.lang.reflect.Field;
+import org.junit.Before;
+import org.junit.Test;
+
+public class FieldExtractorTest {
+
+    private static final String VALUE = "the value";
+    private static final Integer INT_VALUE = 10;
+
+    private Field field;
+    private FieldExtractor ext;
+
+    @Before
+    public void setUp() throws Exception {
+        field = MyClass.class.getDeclaredField("value");
+        ext = new FieldExtractor(field);
+    }
+
+    @Test
+    public void testExtract() throws Exception {
+        assertEquals(VALUE, ext.extract(new MyClass()));
+
+        // repeat
+        assertEquals(VALUE, ext.extract(new MyClass()));
+
+        // null value
+        MyClass obj = new MyClass();
+        obj.value = null;
+        assertEquals(null, ext.extract(obj));
+
+        obj.value = VALUE + "X";
+        assertEquals(VALUE + "X", ext.extract(obj));
+
+        // different value type
+        field = MyClass.class.getDeclaredField("value2");
+        ext = new FieldExtractor(field);
+        assertEquals(INT_VALUE, ext.extract(new MyClass()));
+    }
+
+    @Test
+    public void testExtract_ArgEx() {
+        // pass it the wrong class type
+        assertNull(ext.extract(this));
+    }
+
+    private static class MyClass {
+        @SuppressWarnings("unused")
+        private String value = VALUE;
+
+        @SuppressWarnings("unused")
+        private int value2 = INT_VALUE;
+    }
+}