| /* |
| * 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.math4.legacy.core; |
| |
| import java.util.Arrays; |
| |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import org.apache.commons.numbers.core.Precision; |
| import org.apache.commons.math4.legacy.exception.DimensionMismatchException; |
| import org.apache.commons.math4.legacy.exception.MathArithmeticException; |
| import org.apache.commons.math4.legacy.exception.MathIllegalArgumentException; |
| import org.apache.commons.math4.legacy.exception.NoDataException; |
| import org.apache.commons.math4.legacy.exception.NonMonotonicSequenceException; |
| import org.apache.commons.math4.legacy.exception.NotANumberException; |
| import org.apache.commons.math4.legacy.exception.NotPositiveException; |
| import org.apache.commons.math4.legacy.exception.NotStrictlyPositiveException; |
| import org.apache.commons.math4.legacy.exception.NullArgumentException; |
| import org.apache.commons.math4.core.jdkmath.JdkMath; |
| |
| /** |
| * Test cases for the {@link MathArrays} class. |
| */ |
| public class MathArraysTest { |
| |
| private double[] testArray = {0, 1, 2, 3, 4, 5}; |
| private double[] testWeightsArray = {0.3, 0.2, 1.3, 1.1, 1.0, 1.8}; |
| private double[] testNegativeWeightsArray = {-0.3, 0.2, -1.3, 1.1, 1.0, 1.8}; |
| private double[] singletonArray = {0}; |
| |
| @Test |
| public void testScale() { |
| final double[] test = new double[] {-2.5, -1, 0, 1, 2.5}; |
| final double[] correctTest = Arrays.copyOf(test, test.length); |
| final double[] correctScaled = new double[]{5.25, 2.1, 0, -2.1, -5.25}; |
| |
| final double[] scaled = MathArrays.scale(-2.1, test); |
| |
| // Make sure test has not changed |
| for (int i = 0; i < test.length; i++) { |
| Assert.assertEquals(correctTest[i], test[i], 0); |
| } |
| |
| // Test scaled values |
| for (int i = 0; i < scaled.length; i++) { |
| Assert.assertEquals(correctScaled[i], scaled[i], 0); |
| } |
| } |
| |
| @Test |
| public void testScaleInPlace() { |
| final double[] test = new double[] {-2.5, -1, 0, 1, 2.5}; |
| final double[] correctScaled = new double[]{5.25, 2.1, 0, -2.1, -5.25}; |
| MathArrays.scaleInPlace(-2.1, test); |
| |
| // Make sure test has changed |
| for (int i = 0; i < test.length; i++) { |
| Assert.assertEquals(correctScaled[i], test[i], 0); |
| } |
| } |
| |
| @Test(expected = DimensionMismatchException.class) |
| public void testEbeAddPrecondition() { |
| MathArrays.ebeAdd(new double[3], new double[4]); |
| } |
| @Test(expected = DimensionMismatchException.class) |
| public void testEbeSubtractPrecondition() { |
| MathArrays.ebeSubtract(new double[3], new double[4]); |
| } |
| @Test(expected = DimensionMismatchException.class) |
| public void testEbeMultiplyPrecondition() { |
| MathArrays.ebeMultiply(new double[3], new double[4]); |
| } |
| @Test(expected = DimensionMismatchException.class) |
| public void testEbeDividePrecondition() { |
| MathArrays.ebeDivide(new double[3], new double[4]); |
| } |
| |
| @Test |
| public void testEbeAdd() { |
| final double[] a = {0, 1, 2}; |
| final double[] b = {3, 5, 7}; |
| final double[] r = MathArrays.ebeAdd(a, b); |
| |
| for (int i = 0; i < a.length; i++) { |
| Assert.assertEquals(a[i] + b[i], r[i], 0); |
| } |
| } |
| @Test |
| public void testEbeSubtract() { |
| final double[] a = {0, 1, 2}; |
| final double[] b = {3, 5, 7}; |
| final double[] r = MathArrays.ebeSubtract(a, b); |
| |
| for (int i = 0; i < a.length; i++) { |
| Assert.assertEquals(a[i] - b[i], r[i], 0); |
| } |
| } |
| |
| @Test |
| public void testEbeMultiply() { |
| final double[] a = {0, 1, 2}; |
| final double[] b = {3, 5, 7}; |
| final double[] r = MathArrays.ebeMultiply(a, b); |
| |
| for (int i = 0; i < a.length; i++) { |
| Assert.assertEquals(a[i] * b[i], r[i], 0); |
| } |
| } |
| |
| @Test |
| public void testEbeDivide() { |
| final double[] a = {0, 1, 2}; |
| final double[] b = {3, 5, 7}; |
| final double[] r = MathArrays.ebeDivide(a, b); |
| |
| for (int i = 0; i < a.length; i++) { |
| Assert.assertEquals(a[i] / b[i], r[i], 0); |
| } |
| } |
| |
| @Test |
| public void testL1DistanceDouble() { |
| double[] p1 = {2.5, 0.0}; |
| double[] p2 = {-0.5, 4.0}; |
| Assert.assertTrue(Precision.equals(7.0, MathArrays.distance1(p1, p2), 1)); |
| } |
| |
| @Test |
| public void testL1DistanceInt() { |
| int[] p1 = {3, 0}; |
| int[] p2 = {0, 4}; |
| Assert.assertEquals(7, MathArrays.distance1(p1, p2)); |
| } |
| |
| @Test |
| public void testL2DistanceDouble() { |
| double[] p1 = {2.5, 0.0}; |
| double[] p2 = {-0.5, 4.0}; |
| Assert.assertTrue(Precision.equals(5.0, MathArrays.distance(p1, p2), 1)); |
| } |
| |
| @Test |
| public void testL2DistanceInt() { |
| int[] p1 = {3, 0}; |
| int[] p2 = {0, 4}; |
| Assert.assertTrue(Precision.equals(5, MathArrays.distance(p1, p2), 1)); |
| } |
| |
| @Test |
| public void testLInfDistanceDouble() { |
| double[] p1 = {2.5, 0.0}; |
| double[] p2 = {-0.5, 4.0}; |
| Assert.assertTrue(Precision.equals(4.0, MathArrays.distanceInf(p1, p2), 1)); |
| } |
| |
| @Test |
| public void testLInfDistanceInt() { |
| int[] p1 = {3, 0}; |
| int[] p2 = {0, 4}; |
| Assert.assertEquals(4, MathArrays.distanceInf(p1, p2)); |
| } |
| |
| @Test |
| public void testCheckOrder() { |
| MathArrays.checkOrder(new double[] {-15, -5.5, -1, 2, 15}, |
| MathArrays.OrderDirection.INCREASING, true); |
| MathArrays.checkOrder(new double[] {-15, -5.5, -1, 2, 2}, |
| MathArrays.OrderDirection.INCREASING, false); |
| MathArrays.checkOrder(new double[] {3, -5.5, -11, -27.5}, |
| MathArrays.OrderDirection.DECREASING, true); |
| MathArrays.checkOrder(new double[] {3, 0, 0, -5.5, -11, -27.5}, |
| MathArrays.OrderDirection.DECREASING, false); |
| |
| try { |
| MathArrays.checkOrder(new double[] {-15, -5.5, -1, -1, 2, 15}, |
| MathArrays.OrderDirection.INCREASING, true); |
| Assert.fail("an exception should have been thrown"); |
| } catch (NonMonotonicSequenceException e) { |
| // Expected |
| } |
| try { |
| MathArrays.checkOrder(new double[] {-15, -5.5, -1, -2, 2}, |
| MathArrays.OrderDirection.INCREASING, false); |
| Assert.fail("an exception should have been thrown"); |
| } catch (NonMonotonicSequenceException e) { |
| // Expected |
| } |
| try { |
| MathArrays.checkOrder(new double[] {3, 3, -5.5, -11, -27.5}, |
| MathArrays.OrderDirection.DECREASING, true); |
| Assert.fail("an exception should have been thrown"); |
| } catch (NonMonotonicSequenceException e) { |
| // Expected |
| } |
| try { |
| MathArrays.checkOrder(new double[] {3, -1, 0, -5.5, -11, -27.5}, |
| MathArrays.OrderDirection.DECREASING, false); |
| Assert.fail("an exception should have been thrown"); |
| } catch (NonMonotonicSequenceException e) { |
| // Expected |
| } |
| try { |
| MathArrays.checkOrder(new double[] {3, 0, -5.5, -11, -10}, |
| MathArrays.OrderDirection.DECREASING, false); |
| Assert.fail("an exception should have been thrown"); |
| } catch (NonMonotonicSequenceException e) { |
| // Expected |
| } |
| } |
| |
| @Test |
| public void testIsMonotonic() { |
| Assert.assertFalse(MathArrays.isMonotonic(new double[] {-15, -5.5, -1, -1, 2, 15}, |
| MathArrays.OrderDirection.INCREASING, true)); |
| Assert.assertTrue(MathArrays.isMonotonic(new double[] {-15, -5.5, -1, 0, 2, 15}, |
| MathArrays.OrderDirection.INCREASING, true)); |
| Assert.assertFalse(MathArrays.isMonotonic(new double[] {-15, -5.5, -1, -2, 2}, |
| MathArrays.OrderDirection.INCREASING, false)); |
| Assert.assertTrue(MathArrays.isMonotonic(new double[] {-15, -5.5, -1, -1, 2}, |
| MathArrays.OrderDirection.INCREASING, false)); |
| Assert.assertFalse(MathArrays.isMonotonic(new double[] {3, 3, -5.5, -11, -27.5}, |
| MathArrays.OrderDirection.DECREASING, true)); |
| Assert.assertTrue(MathArrays.isMonotonic(new double[] {3, 2, -5.5, -11, -27.5}, |
| MathArrays.OrderDirection.DECREASING, true)); |
| Assert.assertFalse(MathArrays.isMonotonic(new double[] {3, -1, 0, -5.5, -11, -27.5}, |
| MathArrays.OrderDirection.DECREASING, false)); |
| Assert.assertTrue(MathArrays.isMonotonic(new double[] {3, 0, 0, -5.5, -11, -27.5}, |
| MathArrays.OrderDirection.DECREASING, false)); |
| } |
| |
| @Test |
| public void testIsMonotonicComparable() { |
| Assert.assertFalse(MathArrays.isMonotonic(new Double[] {Double.valueOf(-15), |
| Double.valueOf(-5.5), |
| Double.valueOf(-1), |
| Double.valueOf(-1), |
| Double.valueOf(2), |
| Double.valueOf(15) }, |
| MathArrays.OrderDirection.INCREASING, true)); |
| Assert.assertTrue(MathArrays.isMonotonic(new Double[] {Double.valueOf(-15), |
| Double.valueOf(-5.5), |
| Double.valueOf(-1), |
| Double.valueOf(0), |
| Double.valueOf(2), |
| Double.valueOf(15) }, |
| MathArrays.OrderDirection.INCREASING, true)); |
| Assert.assertFalse(MathArrays.isMonotonic(new Double[] {Double.valueOf(-15), |
| Double.valueOf(-5.5), |
| Double.valueOf(-1), |
| Double.valueOf(-2), |
| Double.valueOf(2) }, |
| MathArrays.OrderDirection.INCREASING, false)); |
| Assert.assertTrue(MathArrays.isMonotonic(new Double[] {Double.valueOf(-15), |
| Double.valueOf(-5.5), |
| Double.valueOf(-1), |
| Double.valueOf(-1), |
| Double.valueOf(2) }, |
| MathArrays.OrderDirection.INCREASING, false)); |
| Assert.assertFalse(MathArrays.isMonotonic(new Double[] {Double.valueOf(3), |
| Double.valueOf(3), |
| Double.valueOf(-5.5), |
| Double.valueOf(-11), |
| Double.valueOf(-27.5) }, |
| MathArrays.OrderDirection.DECREASING, true)); |
| Assert.assertTrue(MathArrays.isMonotonic(new Double[] {Double.valueOf(3), |
| Double.valueOf(2), |
| Double.valueOf(-5.5), |
| Double.valueOf(-11), |
| Double.valueOf(-27.5) }, |
| MathArrays.OrderDirection.DECREASING, true)); |
| Assert.assertFalse(MathArrays.isMonotonic(new Double[] {Double.valueOf(3), |
| Double.valueOf(-1), |
| Double.valueOf(0), |
| Double.valueOf(-5.5), |
| Double.valueOf(-11), |
| Double.valueOf(-27.5) }, |
| MathArrays.OrderDirection.DECREASING, false)); |
| Assert.assertTrue(MathArrays.isMonotonic(new Double[] {Double.valueOf(3), |
| Double.valueOf(0), |
| Double.valueOf(0), |
| Double.valueOf(-5.5), |
| Double.valueOf(-11), |
| Double.valueOf(-27.5) }, |
| MathArrays.OrderDirection.DECREASING, false)); |
| } |
| |
| @Test |
| public void testCheckRectangular() { |
| final long[][] rect = new long[][] {{0, 1}, {2, 3}}; |
| final long[][] ragged = new long[][] {{0, 1}, {2}}; |
| final long[][] nullArray = null; |
| final long[][] empty = new long[][] {}; |
| MathArrays.checkRectangular(rect); |
| MathArrays.checkRectangular(empty); |
| try { |
| MathArrays.checkRectangular(ragged); |
| Assert.fail("Expecting DimensionMismatchException"); |
| } catch (DimensionMismatchException ex) { |
| // Expected |
| } |
| try { |
| MathArrays.checkRectangular(nullArray); |
| Assert.fail("Expecting NullArgumentException"); |
| } catch (NullArgumentException ex) { |
| // Expected |
| } |
| } |
| |
| @Test |
| public void testCheckPositive() { |
| final double[] positive = new double[] {1, 2, 3}; |
| final double[] nonNegative = new double[] {0, 1, 2}; |
| final double[] nullArray = null; |
| final double[] empty = new double[] {}; |
| MathArrays.checkPositive(positive); |
| MathArrays.checkPositive(empty); |
| try { |
| MathArrays.checkPositive(nullArray); |
| Assert.fail("Expecting NullPointerException"); |
| } catch (NullPointerException ex) { |
| // Expected |
| } |
| try { |
| MathArrays.checkPositive(nonNegative); |
| Assert.fail("Expecting NotStrictlyPositiveException"); |
| } catch (NotStrictlyPositiveException ex) { |
| // Expected |
| } |
| } |
| |
| @Test |
| public void testCheckNonNegative() { |
| final long[] nonNegative = new long[] {0, 1}; |
| final long[] hasNegative = new long[] {-1}; |
| final long[] nullArray = null; |
| final long[] empty = new long[] {}; |
| MathArrays.checkNonNegative(nonNegative); |
| MathArrays.checkNonNegative(empty); |
| try { |
| MathArrays.checkNonNegative(nullArray); |
| Assert.fail("Expecting NullPointerException"); |
| } catch (NullPointerException ex) { |
| // Expected |
| } |
| try { |
| MathArrays.checkNonNegative(hasNegative); |
| Assert.fail("Expecting NotPositiveException"); |
| } catch (NotPositiveException ex) { |
| // Expected |
| } |
| } |
| |
| @Test |
| public void testCheckNonNegative2D() { |
| final long[][] nonNegative = new long[][] {{0, 1}, {1, 0}}; |
| final long[][] hasNegative = new long[][] {{-1}, {0}}; |
| final long[][] nullArray = null; |
| final long[][] empty = new long[][] {}; |
| MathArrays.checkNonNegative(nonNegative); |
| MathArrays.checkNonNegative(empty); |
| try { |
| MathArrays.checkNonNegative(nullArray); |
| Assert.fail("Expecting NullPointerException"); |
| } catch (NullPointerException ex) { |
| // Expected |
| } |
| try { |
| MathArrays.checkNonNegative(hasNegative); |
| Assert.fail("Expecting NotPositiveException"); |
| } catch (NotPositiveException ex) { |
| // Expected |
| } |
| } |
| |
| @Test |
| public void testCheckNotNaN() { |
| final double[] withoutNaN = {Double.NEGATIVE_INFINITY, |
| -Double.MAX_VALUE, |
| -1, 0, |
| Double.MIN_VALUE, |
| JdkMath.ulp(1d), |
| 1, 3, 113, 4769, |
| Double.MAX_VALUE, |
| Double.POSITIVE_INFINITY }; |
| |
| final double[] withNaN = {Double.NEGATIVE_INFINITY, |
| -Double.MAX_VALUE, |
| -1, 0, |
| Double.MIN_VALUE, |
| JdkMath.ulp(1d), |
| 1, 3, 113, 4769, |
| Double.MAX_VALUE, |
| Double.POSITIVE_INFINITY, |
| Double.NaN }; |
| |
| |
| final double[] nullArray = null; |
| final double[] empty = new double[] {}; |
| MathArrays.checkNotNaN(withoutNaN); |
| MathArrays.checkNotNaN(empty); |
| try { |
| MathArrays.checkNotNaN(nullArray); |
| Assert.fail("Expecting NullPointerException"); |
| } catch (NullPointerException ex) { |
| // Expected |
| } |
| try { |
| MathArrays.checkNotNaN(withNaN); |
| Assert.fail("Expecting NotANumberException"); |
| } catch (NotANumberException ex) { |
| // Expected |
| } |
| } |
| |
| @Test(expected = DimensionMismatchException.class) |
| public void testCheckEqualLength1() { |
| MathArrays.checkEqualLength(new double[] {1, 2, 3}, |
| new double[] {1, 2, 3, 4}); |
| } |
| |
| @Test |
| public void testCheckEqualLength2() { |
| final double[] a = new double[] {-1, -12, -23, -34}; |
| final double[] b = new double[] {56, 67, 78, 89}; |
| Assert.assertTrue(MathArrays.checkEqualLength(a, b, false)); |
| } |
| |
| @Test |
| public void testArrayEquals() { |
| Assert.assertFalse(MathArrays.equals(new double[] {1d}, null)); |
| Assert.assertFalse(MathArrays.equals(null, new double[] {1d})); |
| Assert.assertTrue(MathArrays.equals((double[]) null, (double[]) null)); |
| |
| Assert.assertFalse(MathArrays.equals(new double[] {1d}, new double[0])); |
| Assert.assertTrue(MathArrays.equals(new double[] {1d}, new double[] {1d})); |
| Assert.assertTrue(MathArrays.equals(new double[] {Double.POSITIVE_INFINITY, |
| Double.NEGATIVE_INFINITY, 1d, 0d}, |
| new double[] {Double.POSITIVE_INFINITY, |
| Double.NEGATIVE_INFINITY, 1d, 0d})); |
| Assert.assertFalse(MathArrays.equals(new double[] {Double.NaN}, |
| new double[] {Double.NaN})); |
| Assert.assertFalse(MathArrays.equals(new double[] {Double.POSITIVE_INFINITY}, |
| new double[] {Double.NEGATIVE_INFINITY})); |
| Assert.assertFalse(MathArrays.equals(new double[] {1d}, |
| new double[] {JdkMath.nextAfter(JdkMath.nextAfter(1d, 2d), 2d)})); |
| |
| } |
| |
| @Test |
| public void testArrayEqualsIncludingNaN() { |
| Assert.assertFalse(MathArrays.equalsIncludingNaN(new double[] {1d}, null)); |
| Assert.assertFalse(MathArrays.equalsIncludingNaN(null, new double[] {1d})); |
| Assert.assertTrue(MathArrays.equalsIncludingNaN((double[]) null, (double[]) null)); |
| |
| Assert.assertFalse(MathArrays.equalsIncludingNaN(new double[] {1d}, new double[0])); |
| Assert.assertTrue(MathArrays.equalsIncludingNaN(new double[] {1d}, new double[] {1d})); |
| Assert.assertTrue(MathArrays.equalsIncludingNaN(new double[] {Double.NaN, Double.POSITIVE_INFINITY, |
| Double.NEGATIVE_INFINITY, 1d, 0d}, |
| new double[] {Double.NaN, Double.POSITIVE_INFINITY, |
| Double.NEGATIVE_INFINITY, 1d, 0d})); |
| Assert.assertFalse(MathArrays.equalsIncludingNaN(new double[] {Double.POSITIVE_INFINITY}, |
| new double[] {Double.NEGATIVE_INFINITY})); |
| Assert.assertFalse(MathArrays.equalsIncludingNaN(new double[] {1d}, |
| new double[] {JdkMath.nextAfter(JdkMath.nextAfter(1d, 2d), 2d)})); |
| } |
| |
| @Test |
| public void testNormalizeArray() { |
| double[] testValues1 = new double[] {1, 1, 2}; |
| Assert.assertArrayEquals(new double[] {.25, .25, .5}, |
| MathArrays.normalizeArray(testValues1, 1), |
| Double.MIN_VALUE); |
| |
| double[] testValues2 = new double[] {-1, -1, 1}; |
| Assert.assertArrayEquals(new double[] {1, 1, -1}, |
| MathArrays.normalizeArray(testValues2, 1), |
| Double.MIN_VALUE); |
| |
| // Ignore NaNs |
| double[] testValues3 = new double[] {-1, -1, Double.NaN, 1, Double.NaN}; |
| Assert.assertArrayEquals(new double[] {1, 1, Double.NaN, -1, Double.NaN}, |
| MathArrays.normalizeArray(testValues3, 1), |
| Double.MIN_VALUE); |
| |
| // Zero sum -> MathArithmeticException |
| double[] zeroSum = new double[] {-1, 1}; |
| try { |
| MathArrays.normalizeArray(zeroSum, 1); |
| Assert.fail("expecting MathArithmeticException"); |
| } catch (MathArithmeticException ex) { /* ignore */ } |
| |
| // Infinite elements -> MathArithmeticException |
| double[] hasInf = new double[] {1, 2, 1, Double.NEGATIVE_INFINITY}; |
| try { |
| MathArrays.normalizeArray(hasInf, 1); |
| Assert.fail("expecting MathIllegalArgumentException"); |
| } catch (MathIllegalArgumentException ex) { /* ignore */ } |
| |
| // Infinite target -> MathIllegalArgumentException |
| try { |
| MathArrays.normalizeArray(testValues1, Double.POSITIVE_INFINITY); |
| Assert.fail("expecting MathIllegalArgumentException"); |
| } catch (MathIllegalArgumentException ex) { /* ignore */ } |
| |
| // NaN target -> MathIllegalArgumentException |
| try { |
| MathArrays.normalizeArray(testValues1, Double.NaN); |
| Assert.fail("expecting MathIllegalArgumentException"); |
| } catch (MathIllegalArgumentException ex) { /* ignore */ } |
| } |
| |
| @Test |
| public void testConvolve() { |
| /* Test Case (obtained via SciPy) |
| * x=[1.2,-1.8,1.4] |
| * h=[1,0.8,0.5,0.3] |
| * convolve(x,h) -> array([ 1.2 , -0.84, 0.56, 0.58, 0.16, 0.42]) |
| */ |
| double[] x1 = {1.2, -1.8, 1.4}; |
| double[] h1 = {1, 0.8, 0.5, 0.3}; |
| double[] y1 = {1.2, -0.84, 0.56, 0.58, 0.16, 0.42}; |
| double tolerance = 1e-13; |
| |
| double[] yActual = MathArrays.convolve(x1, h1); |
| Assert.assertArrayEquals(y1, yActual, tolerance); |
| |
| double[] x2 = {1, 2, 3}; |
| double[] h2 = {0, 1, 0.5}; |
| double[] y2 = {0, 1, 2.5, 4, 1.5}; |
| |
| yActual = MathArrays.convolve(x2, h2); |
| Assert.assertArrayEquals(y2, yActual, tolerance); |
| |
| try { |
| MathArrays.convolve(new double[]{1, 2}, null); |
| Assert.fail("an exception should have been thrown"); |
| } catch (NullArgumentException e) { |
| // expected behavior |
| } |
| |
| try { |
| MathArrays.convolve(null, new double[]{1, 2}); |
| Assert.fail("an exception should have been thrown"); |
| } catch (NullArgumentException e) { |
| // expected behavior |
| } |
| |
| try { |
| MathArrays.convolve(new double[]{1, 2}, new double[]{}); |
| Assert.fail("an exception should have been thrown"); |
| } catch (NoDataException e) { |
| // expected behavior |
| } |
| |
| try { |
| MathArrays.convolve(new double[]{}, new double[]{1, 2}); |
| Assert.fail("an exception should have been thrown"); |
| } catch (NoDataException e) { |
| // expected behavior |
| } |
| |
| try { |
| MathArrays.convolve(new double[]{}, new double[]{}); |
| Assert.fail("an exception should have been thrown"); |
| } catch (NoDataException e) { |
| // expected behavior |
| } |
| } |
| |
| @Test |
| public void testNatural() { |
| final int n = 4; |
| final int[] expected = {0, 1, 2, 3}; |
| |
| final int[] natural = MathArrays.natural(n); |
| for (int i = 0; i < n; i++) { |
| Assert.assertEquals(expected[i], natural[i]); |
| } |
| } |
| |
| @Test |
| public void testNaturalZero() { |
| final int[] natural = MathArrays.natural(0); |
| Assert.assertEquals(0, natural.length); |
| } |
| |
| @Test |
| public void testSequence() { |
| final int size = 4; |
| final int start = 5; |
| final int stride = 2; |
| final int[] expected = {5, 7, 9, 11}; |
| |
| final int[] seq = MathArrays.sequence(size, start, stride); |
| for (int i = 0; i < size; i++) { |
| Assert.assertEquals(expected[i], seq[i]); |
| } |
| } |
| |
| @Test |
| public void testSequenceZero() { |
| final int[] seq = MathArrays.sequence(0, 12345, 6789); |
| Assert.assertEquals(0, seq.length); |
| } |
| |
| @Test |
| public void testVerifyValuesPositive() { |
| for (int j = 0; j < 6; j++) { |
| for (int i = 1; i < (7 - j); i++) { |
| Assert.assertTrue(MathArrays.verifyValues(testArray, 0, i)); |
| } |
| } |
| Assert.assertTrue(MathArrays.verifyValues(singletonArray, 0, 1)); |
| Assert.assertTrue(MathArrays.verifyValues(singletonArray, 0, 0, true)); |
| } |
| |
| @Test |
| public void testVerifyValuesNegative() { |
| final double[] nullArray = null; |
| Assert.assertFalse(MathArrays.verifyValues(singletonArray, 0, 0)); |
| Assert.assertFalse(MathArrays.verifyValues(testArray, 0, 0)); |
| Assert.assertTrue(MathArrays.verifyValues(testArray, 0, 0, true)); |
| Assert.assertFalse(MathArrays.verifyValues(testArray, testWeightsArray, 0, 0)); |
| Assert.assertTrue(MathArrays.verifyValues(testArray, testWeightsArray, 0, 0, true)); |
| try { |
| MathArrays.verifyValues(singletonArray, 2, 1); // start past end |
| Assert.fail("Expecting MathIllegalArgumentException"); |
| } catch (MathIllegalArgumentException ex) { |
| // expected |
| } |
| try { |
| MathArrays.verifyValues(testArray, 0, 7); // end past end |
| Assert.fail("Expecting MathIllegalArgumentException"); |
| } catch (MathIllegalArgumentException ex) { |
| // expected |
| } |
| try { |
| MathArrays.verifyValues(testArray, -1, 1); // start negative |
| Assert.fail("Expecting MathIllegalArgumentException"); |
| } catch (MathIllegalArgumentException ex) { |
| // expected |
| } |
| try { |
| MathArrays.verifyValues(testArray, 0, -1); // length negative |
| Assert.fail("Expecting MathIllegalArgumentException"); |
| } catch (MathIllegalArgumentException ex) { |
| // expected |
| } |
| try { |
| MathArrays.verifyValues(nullArray, 0, 1); // null array |
| Assert.fail("Expecting NullArgumentException"); |
| } catch (NullArgumentException ex) { |
| // expected |
| } |
| try { |
| MathArrays.verifyValues(testArray, nullArray, 0, 1); // null weights array |
| Assert.fail("Expecting NullArgumentException"); |
| } catch (NullArgumentException ex) { |
| // expected |
| } |
| try { |
| MathArrays.verifyValues(singletonArray, testWeightsArray, 0, 1); // weights.length != value.length |
| Assert.fail("Expecting MathIllegalArgumentException"); |
| } catch (MathIllegalArgumentException ex) { |
| // expected |
| } |
| try { |
| MathArrays.verifyValues(testArray, testNegativeWeightsArray, 0, 6); // can't have negative weights |
| Assert.fail("Expecting MathIllegalArgumentException"); |
| } catch (MathIllegalArgumentException ex) { |
| // expected |
| } |
| try { |
| MathArrays.verifyValues(testArray, new double[testArray.length], 0, 6); // can't have all zero weights |
| Assert.fail("Expecting MathIllegalArgumentException"); |
| } catch (MathIllegalArgumentException ex) { |
| // expected |
| } |
| } |
| |
| @Test |
| public void testConcatenate() { |
| final double[] u = new double[] {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; |
| final double[] x = new double[] {0, 1, 2}; |
| final double[] y = new double[] {3, 4, 5, 6, 7, 8}; |
| final double[] z = new double[] {9}; |
| Assert.assertArrayEquals(u, MathArrays.concatenate(x, y, z), 0); |
| } |
| |
| @Test |
| public void testConcatenateSingle() { |
| final double[] x = new double[] {0, 1, 2}; |
| Assert.assertArrayEquals(x, MathArrays.concatenate(x), 0); |
| } |
| |
| public void testConcatenateEmptyArguments() { |
| final double[] x = new double[] {0, 1, 2}; |
| final double[] y = new double[] {3}; |
| final double[] z = new double[] {}; |
| final double[] u = new double[] {0, 1, 2, 3}; |
| Assert.assertArrayEquals(u, MathArrays.concatenate(x, z, y), 0); |
| Assert.assertArrayEquals(u, MathArrays.concatenate(x, y, z), 0); |
| Assert.assertArrayEquals(u, MathArrays.concatenate(z, x, y), 0); |
| Assert.assertEquals(0, MathArrays.concatenate(z, z, z).length); |
| } |
| |
| @Test(expected = NullPointerException.class) |
| public void testConcatenateNullArguments() { |
| final double[] x = new double[] {0, 1, 2}; |
| MathArrays.concatenate(x, null); |
| } |
| |
| @Test |
| public void testUnique() { |
| final double[] x = {0, 9, 3, 0, 11, 7, 3, 5, -1, -2}; |
| final double[] values = {11, 9, 7, 5, 3, 0, -1, -2}; |
| Assert.assertArrayEquals(values, MathArrays.unique(x), 0); |
| } |
| |
| @Test |
| public void testUniqueInfiniteValues() { |
| final double[] x = {0, Double.NEGATIVE_INFINITY, 3, Double.NEGATIVE_INFINITY, |
| 3, Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY}; |
| final double[] u = {Double.POSITIVE_INFINITY, 3, 0, Double.NEGATIVE_INFINITY}; |
| Assert.assertArrayEquals(u, MathArrays.unique(x), 0); |
| } |
| |
| @Test |
| public void testUniqueNaNValues() { |
| final double[] x = new double[] {10, 2, Double.NaN, Double.NaN, Double.NaN, |
| Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY, Double.NEGATIVE_INFINITY}; |
| final double[] u = MathArrays.unique(x); |
| Assert.assertEquals(5, u.length); |
| Assert.assertTrue(Double.isNaN(u[0])); |
| Assert.assertEquals(Double.POSITIVE_INFINITY, u[1], 0); |
| Assert.assertEquals(10, u[2], 0); |
| Assert.assertEquals(2, u[3], 0); |
| Assert.assertEquals(Double.NEGATIVE_INFINITY, u[4], 0); |
| } |
| |
| @Test(expected = NullPointerException.class) |
| public void testUniqueNullArgument() { |
| MathArrays.unique(null); |
| } |
| } |
