Github user myui commented on a diff in the pull request:
https://github.com/apache/incubator-hivemall/pull/52#discussion_r103386937
--- Diff: core/src/test/java/hivemall/evaluation/AUCUDAFTest.java ---
@@ -0,0 +1,218 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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 hivemall.evaluation;
+
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator;
+import
org.apache.hadoop.hive.ql.udf.generic.SimpleGenericUDAFParameterInfo;
+import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
+import
org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorFactory;
+import
org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector;
+import
org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+public class AUCUDAFTest {
+ AUCUDAF auc;
+ GenericUDAFEvaluator evaluator;
+ ObjectInspector[] inputOIs;
+ ObjectInspector[] partialOI;
+ AUCUDAF.ClassificationAUCAggregationBuffer agg;
+
+ @Before
+ public void setUp() throws Exception {
+ auc = new AUCUDAF();
+
+ inputOIs = new ObjectInspector[] {
+
PrimitiveObjectInspectorFactory.getPrimitiveJavaObjectInspector(
+ PrimitiveObjectInspector.PrimitiveCategory.DOUBLE),
+
PrimitiveObjectInspectorFactory.getPrimitiveJavaObjectInspector(
+
PrimitiveObjectInspector.PrimitiveCategory.DOUBLE)};
+
+ evaluator = auc.getEvaluator(new
SimpleGenericUDAFParameterInfo(inputOIs, false, false));
+
+ ArrayList<String> fieldNames = new ArrayList<String>();
+ ArrayList<ObjectInspector> fieldOIs = new
ArrayList<ObjectInspector>();
+ fieldNames.add("a");
+
fieldOIs.add(PrimitiveObjectInspectorFactory.writableDoubleObjectInspector);
+ fieldNames.add("scorePrev");
+
fieldOIs.add(PrimitiveObjectInspectorFactory.writableDoubleObjectInspector);
+ fieldNames.add("fp");
+
fieldOIs.add(PrimitiveObjectInspectorFactory.writableLongObjectInspector);
+ fieldNames.add("tp");
+
fieldOIs.add(PrimitiveObjectInspectorFactory.writableLongObjectInspector);
+ fieldNames.add("fpPrev");
+
fieldOIs.add(PrimitiveObjectInspectorFactory.writableLongObjectInspector);
+ fieldNames.add("tpPrev");
+
fieldOIs.add(PrimitiveObjectInspectorFactory.writableLongObjectInspector);
+
+ partialOI = new ObjectInspector[2];
+ partialOI[0] =
ObjectInspectorFactory.getStandardStructObjectInspector(fieldNames, fieldOIs);
+
+ agg = (AUCUDAF.ClassificationAUCAggregationBuffer)
evaluator.getNewAggregationBuffer();
+ }
+
+ @Test
+ public void test() throws Exception {
+ // should be sorted by scores in a descending order
+ final double[] scores = new double[] {0.8, 0.7, 0.5, 0.3, 0.2};
+ final double[] labels = new double[] {1, 1, 0, 1, 0};
+
+ evaluator.init(GenericUDAFEvaluator.Mode.PARTIAL1, inputOIs);
+ evaluator.reset(agg);
+
+ for (int i = 0; i < scores.length; i++) {
+ evaluator.iterate(agg, new Object[] {scores[i], labels[i]});
+ }
+
+ Assert.assertEquals(0.83333, agg.get(), 1e-5);
+ }
+
+ @Test
+ public void testAllTruePositive() throws Exception {
+ final double[] scores = new double[] {0.8, 0.7, 0.5, 0.3, 0.2};
+ final double[] labels = new double[] {1, 1, 1, 1, 1};
+
+ evaluator.init(GenericUDAFEvaluator.Mode.PARTIAL1, inputOIs);
+ evaluator.reset(agg);
+
+ for (int i = 0; i < scores.length; i++) {
+ evaluator.iterate(agg, new Object[] {scores[i], labels[i]});
+ }
+
+ // AUC for all TP scores are not defined => returns 0
+ Assert.assertEquals(0.d, agg.get(), 1e-5);
+ }
+
+ @Test
+ public void testAllFalsePositive() throws Exception {
+ final double[] scores = new double[] {0.8, 0.7, 0.5, 0.3, 0.2};
+ final double[] labels = new double[] {0, 0, 0, 0, 0};
+
+ evaluator.init(GenericUDAFEvaluator.Mode.PARTIAL1, inputOIs);
+ evaluator.reset(agg);
+
+ for (int i = 0; i < scores.length; i++) {
+ evaluator.iterate(agg, new Object[] {scores[i], labels[i]});
+ }
+
+ // AUC for all FP scores are not defined => returns 0
+ Assert.assertEquals(0.d, agg.get(), 1e-5);
+ }
+
+ @Test
+ public void testMaxAUC() throws Exception {
+ final double[] scores = new double[] {0.8, 0.7, 0.5, 0.3, 0.2};
+ final double[] labels = new double[] {1, 1, 1, 1, 0};
+
+ evaluator.init(GenericUDAFEvaluator.Mode.PARTIAL1, inputOIs);
+ evaluator.reset(agg);
+
+ for (int i = 0; i < scores.length; i++) {
+ evaluator.iterate(agg, new Object[] {scores[i], labels[i]});
+ }
+
+ // All TPs are ranked higher than FPs => AUC=1.0
+ Assert.assertEquals(1.d, agg.get(), 1e-5);
+ }
+
+ @Test
+ public void testMinAUC() throws Exception {
+ final double[] scores = new double[] {0.8, 0.7, 0.5, 0.3, 0.2};
+ final double[] labels = new double[] {0, 0, 0, 1, 1};
+
+ evaluator.init(GenericUDAFEvaluator.Mode.PARTIAL1, inputOIs);
+ evaluator.reset(agg);
+
+ for (int i = 0; i < scores.length; i++) {
+ evaluator.iterate(agg, new Object[] {scores[i], labels[i]});
+ }
+
+ // All TPs are ranked lower than FPs => AUC=0.0
+ Assert.assertEquals(0.d, agg.get(), 1e-5);
+ }
+
+ @Test
+ public void testMidAUC() throws Exception {
+ final double[] scores = new double[] {0.8, 0.7, 0.5, 0.3, 0.2};
+
+ // if TP and FP appear alternately, AUC=0.5
+ final double[] labels1 = new double[] {1, 0, 1, 0, 1};
+ evaluator.init(GenericUDAFEvaluator.Mode.PARTIAL1, inputOIs);
+ evaluator.reset(agg);
+ for (int i = 0; i < scores.length; i++) {
+ evaluator.iterate(agg, new Object[] {scores[i], labels1[i]});
+ }
+ Assert.assertEquals(0.5, agg.get(), 1e-5);
+
+ final double[] labels2 = new double[] {0, 1, 0, 1, 0};
+ evaluator.init(GenericUDAFEvaluator.Mode.PARTIAL1, inputOIs);
+ evaluator.reset(agg);
+ for (int i = 0; i < scores.length; i++) {
+ evaluator.iterate(agg, new Object[] {scores[i], labels2[i]});
+ }
+ Assert.assertEquals(0.5, agg.get(), 1e-5);
+ }
+
+ @Test
+ public void testMerge() throws Exception {
+ final double[] scores = new double[] {0.8, 0.7, 0.5, 0.3, 0.2};
+ final double[] labels = new double[] {1, 1, 0, 1, 0};
+
+ Object[] partials = new Object[3];
+
+ // bin #1
+ evaluator.init(GenericUDAFEvaluator.Mode.PARTIAL1, inputOIs);
+ evaluator.reset(agg);
+ evaluator.iterate(agg, new Object[] {scores[0], labels[0]});
+ evaluator.iterate(agg, new Object[] {scores[1], labels[1]});
+ partials[0] = evaluator.terminatePartial(agg);
+
+ // bin #2
+ evaluator.init(GenericUDAFEvaluator.Mode.PARTIAL1, inputOIs);
+ evaluator.reset(agg);
+ evaluator.iterate(agg, new Object[] {scores[2], labels[2]});
+ evaluator.iterate(agg, new Object[] {scores[3], labels[3]});
+ partials[1] = evaluator.terminatePartial(agg);
+
+ // bin #3
+ evaluator.init(GenericUDAFEvaluator.Mode.PARTIAL1, inputOIs);
+ evaluator.reset(agg);
+ evaluator.iterate(agg, new Object[] {scores[4], labels[4]});
+ partials[2] = evaluator.terminatePartial(agg);
+
+ // merge bins
+ // merge in a different order; e.g., <bin0, bin1>, <bin1, bin0>
should return same value
+ final int[][] orders = new int[][] {{0, 1, 2}, {1, 0, 2}, {1, 2,
0}, {2, 1, 0}};
+ for (int i = 0; i < orders.length; i++) {
+ evaluator.init(GenericUDAFEvaluator.Mode.PARTIAL2, partialOI);
+ evaluator.reset(agg);
+
+ evaluator.merge(agg, partials[orders[i][0]]);
+ evaluator.merge(agg, partials[orders[i][1]]);
+ evaluator.merge(agg, partials[orders[i][2]]);
+
+ Assert.assertEquals(0.83333, agg.get(), 1e-5);
+ }
+ }
+}
--- End diff --
add a blank line
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