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Unit tests. 

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1463534 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Gilles Sadowski 2013-04-02 13:38:26 +00:00
parent 84361f9a4f
commit eea1b0114a
4 changed files with 176 additions and 0 deletions
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48
src/test/java/org/apache/commons/math3/ml/distance/CanberraDistanceTest.java Normal file
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/*
* 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.commons.math3.ml.distance;
import org.junit.Assert;
import org.junit.Test;
/**
* Tests for {@link CanberraDistance} class.
*/
public class CanberraDistanceTest {
final DistanceMeasure distance = new CanberraDistance();
@Test
public void testZero() {
final double[] a = { 0, 1, -2, 3.4, 5, -6.7, 89 };
Assert.assertEquals(0, distance.compute(a, a), 0d);
}
@Test
public void testZero2() {
final double[] a = { 0, 0 };
Assert.assertEquals(0, distance.compute(a, a), 0d);
}
@Test
public void test() {
final double[] a = { 1, 2, 3, 4, 9 };
final double[] b = { -5, -6, 7, 4, 3 };
final double expected = 2.9;
Assert.assertEquals(expected, distance.compute(a, b), 0d);
Assert.assertEquals(expected, distance.compute(b, a), 0d);
}
}

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src/test/java/org/apache/commons/math3/ml/distance/ChebyshevDistanceTest.java Normal file
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/*
* 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.commons.math3.ml.distance;
import org.junit.Assert;
import org.junit.Test;
import org.apache.commons.math3.util.FastMath;
/**
* Tests for {@link ChebyshevDistance} class.
*/
public class ChebyshevDistanceTest {
final DistanceMeasure distance = new ChebyshevDistance();
@Test
public void testZero() {
final double[] a = { 0, 1, -2, 3.4, 5, -6.7, 89 };
Assert.assertEquals(0, distance.compute(a, a), 0d);
}
@Test
public void test() {
final double[] a = { 1, 2, 3, 4 };
final double[] b = { -5, -6, 7, 8 };
final double expected = 8;
Assert.assertEquals(expected, distance.compute(a, b), 0d);
Assert.assertEquals(expected, distance.compute(b, a), 0d);
}
}

43
src/test/java/org/apache/commons/math3/ml/distance/EuclideanDistanceTest.java Normal file
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/*
* 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.commons.math3.ml.distance;
import org.junit.Assert;
import org.junit.Test;
import org.apache.commons.math3.util.FastMath;
/**
* Tests for {@link EuclideanDistance} class.
*/
public class EuclideanDistanceTest {
final DistanceMeasure distance = new EuclideanDistance();
@Test
public void testZero() {
final double[] a = { 0, 1, -2, 3.4, 5, -6.7, 89 };
Assert.assertEquals(0, distance.compute(a, a), 0d);
}
@Test
public void test() {
final double[] a = { 1, -2, 3, 4 };
final double[] b = { -5, -6, 7, 8 };
final double expected = FastMath.sqrt(84);
Assert.assertEquals(expected, distance.compute(a, b), 0d);
Assert.assertEquals(expected, distance.compute(b, a), 0d);
}
}

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src/test/java/org/apache/commons/math3/ml/distance/ManhattanDistanceTest.java Normal file
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/*
* 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.commons.math3.ml.distance;
import org.junit.Assert;
import org.junit.Test;
/**
* Tests for {@link ManhattanDistance} class.
*/
public class ManhattanDistanceTest {
final DistanceMeasure distance = new ManhattanDistance();
@Test
public void testZero() {
final double[] a = { 0, 1, -2, 3.4, 5, -6.7, 89 };
Assert.assertEquals(0, distance.compute(a, a), 0d);
}
@Test
public void test() {
final double[] a = { 1, -2, 3, 4 };
final double[] b = { -5, -6, 7, 8 };
final double expected = 18;
Assert.assertEquals(expected, distance.compute(a, b), 0d);
Assert.assertEquals(expected, distance.compute(b, a), 0d);
}
}