| /* |
| * 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 org.apache.beam.sdk.transforms; |
| |
| import static org.junit.Assert.assertEquals; |
| |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| import org.joda.time.Instant; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** Tests of Min, Max, Mean, and Sum. */ |
| @RunWith(JUnit4.class) |
| public class SimpleStatsFnsTest { |
| static final double DOUBLE_COMPARISON_ACCURACY = 1e-7; |
| |
| private static class TestCase<NumT extends Number & Comparable<NumT>> { |
| final List<NumT> data; |
| final NumT min; |
| final NumT max; |
| final NumT sum; |
| final Double mean; |
| |
| @SafeVarargs |
| @SuppressWarnings("all") |
| public TestCase(NumT min, NumT max, NumT sum, NumT... values) { |
| this.data = Arrays.asList(values); |
| this.min = min; |
| this.max = max; |
| this.sum = sum; |
| this.mean = values.length == 0 ? Double.NaN : sum.doubleValue() / values.length; |
| } |
| } |
| |
| static final List<TestCase<Double>> DOUBLE_CASES = |
| Arrays.asList( |
| new TestCase<>( |
| -312.31, 6312.31, 11629.13, -312.31, 29.13, 112.158, 6312.31, -312.158, -312.158, |
| 112.158, -312.31, 6312.31, 0.0), |
| new TestCase<>(3.14, 3.14, 3.14, 3.14), |
| new TestCase<>(Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY, 0.0)); |
| |
| static final List<TestCase<Long>> LONG_CASES = |
| Arrays.asList( |
| new TestCase<>( |
| -50000000000000000L, |
| 70000000000000000L, |
| 60000033123213121L, |
| 0L, |
| 1L, |
| 10000000000000000L, |
| -50000000000000000L, |
| 70000000000000000L, |
| 0L, |
| 10000000000000000L, |
| -1L, |
| -50000000000000000L, |
| 70000000000000000L, |
| 33123213121L), |
| new TestCase<>(3L, 3L, 3L, 3L), |
| new TestCase<>(Long.MAX_VALUE, Long.MIN_VALUE, 0L)); |
| |
| static final List<TestCase<Integer>> INTEGER_CASES = |
| Arrays.asList( |
| new TestCase<>(-3, 6, 22, 1, -3, 2, 6, 3, 4, -3, 5, 6, 1), |
| new TestCase<>(3, 3, 3, 3), |
| new TestCase<>(Integer.MAX_VALUE, Integer.MIN_VALUE, 0)); |
| |
| @Test |
| public void testInstantStats() { |
| assertEquals( |
| new Instant(1000), |
| Min.<Instant>naturalOrder().apply(Arrays.asList(new Instant(1000), new Instant(2000)))); |
| assertEquals(null, Min.<Instant>naturalOrder().apply(Collections.emptyList())); |
| assertEquals( |
| new Instant(5000), Min.naturalOrder(new Instant(5000)).apply(Collections.emptyList())); |
| |
| assertEquals( |
| new Instant(2000), |
| Max.<Instant>naturalOrder().apply(Arrays.asList(new Instant(1000), new Instant(2000)))); |
| assertEquals(null, Max.<Instant>naturalOrder().apply(Collections.emptyList())); |
| assertEquals( |
| new Instant(5000), Max.naturalOrder(new Instant(5000)).apply(Collections.emptyList())); |
| } |
| |
| @Test |
| public void testDoubleStats() { |
| for (TestCase<Double> t : DOUBLE_CASES) { |
| assertEquals(t.sum, Sum.ofDoubles().apply(t.data), DOUBLE_COMPARISON_ACCURACY); |
| assertEquals(t.min, Min.ofDoubles().apply(t.data), DOUBLE_COMPARISON_ACCURACY); |
| assertEquals(t.max, Max.ofDoubles().apply(t.data), DOUBLE_COMPARISON_ACCURACY); |
| assertEquals(t.mean, Mean.<Double>of().apply(t.data), DOUBLE_COMPARISON_ACCURACY); |
| } |
| } |
| |
| @Test |
| public void testIntegerStats() { |
| for (TestCase<Integer> t : INTEGER_CASES) { |
| assertEquals(t.sum, Sum.ofIntegers().apply(t.data)); |
| assertEquals(t.min, Min.ofIntegers().apply(t.data)); |
| assertEquals(t.max, Max.ofIntegers().apply(t.data)); |
| assertEquals(t.mean, Mean.<Integer>of().apply(t.data)); |
| } |
| } |
| |
| @Test |
| public void testLongStats() { |
| for (TestCase<Long> t : LONG_CASES) { |
| assertEquals(t.sum, Sum.ofLongs().apply(t.data)); |
| assertEquals(t.min, Min.ofLongs().apply(t.data)); |
| assertEquals(t.max, Max.ofLongs().apply(t.data)); |
| assertEquals(t.mean, Mean.<Long>of().apply(t.data)); |
| } |
| } |
| } |