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Java example source code file (RealMatrixFormatAbstractTest.java)

This example Java source code file (RealMatrixFormatAbstractTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

expecting, ignore, infinity, locale, mathparseexception, nan, numberformat, parseposition, realmatrix, realmatrixformat, realmatrixformatabstracttest, should, string, test, text, util

The RealMatrixFormatAbstractTest.java Java example source code

/*
 * 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.linear;

import java.text.NumberFormat;
import java.text.ParsePosition;
import java.util.Locale;

import org.junit.Ignore;
import org.junit.Test;
import org.junit.Assert;

import org.apache.commons.math3.exception.MathParseException;

public abstract class RealMatrixFormatAbstractTest {

    RealMatrixFormat realMatrixFormat = null;
    RealMatrixFormat realMatrixFormatOctave = null;

    protected abstract Locale getLocale();

    protected abstract char getDecimalCharacter();

    public RealMatrixFormatAbstractTest() {
        realMatrixFormat = RealMatrixFormat.getInstance(getLocale());
        final NumberFormat nf = NumberFormat.getInstance(getLocale());
        nf.setMaximumFractionDigits(2);
        realMatrixFormatOctave = new RealMatrixFormat("[", "]", "", "", "; ", ", ", nf);
    }

    @Test
    public void testSimpleNoDecimals() {
        RealMatrix m = MatrixUtils.createRealMatrix(new double[][] {{1, 1, 1}, {1, 1, 1}});
        String expected = "{{1,1,1},{1,1,1}}";
        String actual = realMatrixFormat.format(m);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testSimpleWithDecimals() {
        RealMatrix m = MatrixUtils.createRealMatrix(new double[][] {{1.23, 1.43, 1.63}, {2.46, 2.46, 2.66}});
        String expected =
            "{{1"    + getDecimalCharacter() +
            "23,1" + getDecimalCharacter() +
            "43,1" + getDecimalCharacter() +
            "63},{2" + getDecimalCharacter() +
            "46,2" + getDecimalCharacter() +
            "46,2" + getDecimalCharacter() +
            "66}}";
        String actual = realMatrixFormat.format(m);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testSimpleWithDecimalsTrunc() {
        RealMatrix m = MatrixUtils.createRealMatrix(new double[][] {{1.232323232323, 1.43, 1.63},
                                                                    {2.46, 2.46, 2.666666666666}});
        String expected =
                "{{1"    + getDecimalCharacter() +
                "2323232323,1" + getDecimalCharacter() +
                "43,1" + getDecimalCharacter() +
                "63},{2" + getDecimalCharacter() +
                "46,2" + getDecimalCharacter() +
                "46,2" + getDecimalCharacter() +
                "6666666667}}";
        String actual = realMatrixFormat.format(m);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testNegativeComponent() {
        RealMatrix m = MatrixUtils.createRealMatrix(new double[][] {{-1.232323232323, 1.43, 1.63},
                                                                    {2.46, 2.46, 2.66}});
        String expected =
                "{{-1"    + getDecimalCharacter() +
                "2323232323,1" + getDecimalCharacter() +
                "43,1" + getDecimalCharacter() +
                "63},{2" + getDecimalCharacter() +
                "46,2" + getDecimalCharacter() +
                "46,2" + getDecimalCharacter() +
                "66}}";
        String actual = realMatrixFormat.format(m);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testNegativeComponent2() {
        RealMatrix m = MatrixUtils.createRealMatrix(new double[][] {{1.23, -1.434343434343, 1.63},
                                                                    {2.46, 2.46, 2.66}});
        String expected =
                "{{1"    + getDecimalCharacter() +
                "23,-1" + getDecimalCharacter() +
                "4343434343,1" + getDecimalCharacter() +
                "63},{2" + getDecimalCharacter() +
                "46,2" + getDecimalCharacter() +
                "46,2" + getDecimalCharacter() +
                "66}}";
        String actual = realMatrixFormat.format(m);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testNegativeSecondRow() {
        RealMatrix m = MatrixUtils.createRealMatrix(new double[][] {{1.23, 1.43, 1.63},
                                                                    {-2.66666666666, 2.46, 2.66}});
        String expected =
                "{{1"    + getDecimalCharacter() +
                "23,1" + getDecimalCharacter() +
                "43,1" + getDecimalCharacter() +
                "63},{-2" + getDecimalCharacter() +
                "6666666667,2" + getDecimalCharacter() +
                "46,2" + getDecimalCharacter() +
                "66}}";
        String actual = realMatrixFormat.format(m);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testNonDefaultSetting() {
        RealMatrix m = MatrixUtils.createRealMatrix(new double[][] {{1, 1, 1}, {1, 1, 1}});
        String expected = "[1, 1, 1; 1, 1, 1]";
        String actual = realMatrixFormatOctave.format(m);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testDefaultFormat() {
        Locale defaultLocale = Locale.getDefault();
        Locale.setDefault(getLocale());

        RealMatrix m = MatrixUtils.createRealMatrix(new double[][] {{232.2222222222, -342.33333333333, 432.44444444444}});
        String expected =
            "{{232"    + getDecimalCharacter() +
            "2222222222,-342" + getDecimalCharacter() +
            "3333333333,432" + getDecimalCharacter() +
            "4444444444}}";
        String actual = (new RealMatrixFormat()).format(m);
        Assert.assertEquals(expected, actual);

        Locale.setDefault(defaultLocale);
    }

    @Test
    public void testNan() {
        RealMatrix m = MatrixUtils.createRealMatrix(new double[][] {{Double.NaN, Double.NaN, Double.NaN}});
        String expected = "{{(NaN),(NaN),(NaN)}}";
        String actual = realMatrixFormat.format(m);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testPositiveInfinity() {
        RealMatrix m = MatrixUtils.createRealMatrix(
                new double[][] {{Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY}});
        String expected = "{{(Infinity),(Infinity),(Infinity)}}";
        String actual = realMatrixFormat.format(m);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void tesNegativeInfinity() {
        RealMatrix m = MatrixUtils.createRealMatrix(
                new double[][] {{Double.NEGATIVE_INFINITY, Double.NEGATIVE_INFINITY, Double.NEGATIVE_INFINITY}});
        String expected = "{{(-Infinity),(-Infinity),(-Infinity)}}";
        String actual = realMatrixFormat.format(m);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseSimpleNoDecimals() {
        String source = "{{1, 1, 1}, {1, 1, 1}}";
        RealMatrix expected = MatrixUtils.createRealMatrix(new double[][] {{1, 1, 1}, {1, 1, 1}});
        RealMatrix actual = realMatrixFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    @Ignore
    public void testParseSimpleWithClosingRowSeparator() {
        String source = "{{1, 1, 1},{1, 1, 1}, }}";
        RealMatrix expected = MatrixUtils.createRealMatrix(new double[][] {{1, 1, 1}, {1, 1, 1}});
        RealMatrix actual = realMatrixFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseIgnoredWhitespace() {
        RealMatrix expected = MatrixUtils.createRealMatrix(new double[][] {{1, 1, 1}, {1, 1, 1}});
        ParsePosition pos1 = new ParsePosition(0);
        String source1 = "{{1,1,1},{1,1,1}}";
        Assert.assertEquals(expected, realMatrixFormat.parse(source1, pos1));
        Assert.assertEquals(source1.length(), pos1.getIndex());
        ParsePosition pos2 = new ParsePosition(0);
        String source2 = " { { 1 , 1 , 1 } , { 1 , 1 , 1 } } ";
        Assert.assertEquals(expected, realMatrixFormat.parse(source2, pos2));
        Assert.assertEquals(source2.length() - 1, pos2.getIndex());
    }

    @Test
    public void testParseSimpleWithDecimals() {
        String source =
            "{{1" + getDecimalCharacter() +
            "23,1" + getDecimalCharacter() +
            "43,1" + getDecimalCharacter() +
            "63}}";
        RealMatrix expected = MatrixUtils.createRealMatrix(new double[][] {{1.23, 1.43, 1.63}});
        RealMatrix actual = realMatrixFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseSimpleWithDecimalsTrunc() {
        String source =
            "{{1" + getDecimalCharacter() +
            "2323,1" + getDecimalCharacter() +
            "4343,1" + getDecimalCharacter() +
            "6333}}";
        RealMatrix expected = MatrixUtils.createRealMatrix(new double[][] {{1.2323, 1.4343, 1.6333}});
        RealMatrix actual = realMatrixFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseNegativeComponent() {
        String source =
            "{{-1" + getDecimalCharacter() +
            "2323,1" + getDecimalCharacter() +
            "4343,1" + getDecimalCharacter() +
            "6333}}";
        RealMatrix expected = MatrixUtils.createRealMatrix(new double[][] {{-1.2323, 1.4343, 1.6333}});
        RealMatrix actual = realMatrixFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseNegativeAll() {
        String source =
            "{{-1" + getDecimalCharacter() +
            "2323,-1" + getDecimalCharacter() +
            "4343,-1" + getDecimalCharacter() +
            "6333}}";
        RealMatrix expected = MatrixUtils.createRealMatrix(new double[][] {{-1.2323, -1.4343, -1.6333}});
        RealMatrix actual = realMatrixFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseZeroComponent() {
        String source =
            "{{0" + getDecimalCharacter() +
            "0,-1" + getDecimalCharacter() +
            "4343,1" + getDecimalCharacter() +
            "6333}}";
        RealMatrix expected = MatrixUtils.createRealMatrix(new double[][] {{0.0, -1.4343, 1.6333}});
        RealMatrix actual = realMatrixFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseNonDefaultSetting() {
        String source =
            "[1" + getDecimalCharacter() +
            "2323, 1" + getDecimalCharacter() +
            "4343, 1" + getDecimalCharacter() +
            "6333]";
        RealMatrix expected = MatrixUtils.createRealMatrix(new double[][] {{1.2323, 1.4343, 1.6333}});
        RealMatrix actual = realMatrixFormatOctave.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseNan() {
        String source = "{{(NaN), (NaN), (NaN)}}";
        RealMatrix actual = realMatrixFormat.parse(source);
        RealMatrix expected = MatrixUtils.createRealMatrix(new double[][] {{Double.NaN, Double.NaN, Double.NaN}});
        for (int i = 0; i < expected.getRowDimension(); i++) {
            for (int j = 0; j < expected.getColumnDimension(); j++) {
                Assert.assertTrue(Double.isNaN(actual.getEntry(i, j)));
            }
        }
    }

    @Test
    public void testParsePositiveInfinity() {
        String source = "{{(Infinity), (Infinity), (Infinity)}}";
        RealMatrix actual = realMatrixFormat.parse(source);
        RealMatrix expected = MatrixUtils.createRealMatrix(
                new double[][] {{Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY}});
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseNegativeInfinity() {
        String source = "{{(-Infinity), (-Infinity), (-Infinity)}}";
        RealMatrix actual = realMatrixFormat.parse(source);
        RealMatrix expected = MatrixUtils.createRealMatrix(
                new double[][] {{Double.NEGATIVE_INFINITY, Double.NEGATIVE_INFINITY, Double.NEGATIVE_INFINITY}});
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseNoComponents() {
        try {
            realMatrixFormat.parse("{{ }}");
            Assert.fail("Expecting MathParseException");
        } catch (MathParseException pe) {
            // expected behavior
        }
    }

    @Test
    public void testParseManyComponents() {
        RealMatrix parsed = realMatrixFormat.parse("{{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}}");
        Assert.assertEquals(24, parsed.getColumnDimension());
    }

    @Test
    public void testConstructorSingleFormat() {
        NumberFormat nf = NumberFormat.getInstance();
        RealMatrixFormat mf = new RealMatrixFormat(nf);
        Assert.assertNotNull(mf);
        Assert.assertEquals(nf, mf.getFormat());
    }

    @Test
    public void testForgottenPrefix() {
        ParsePosition pos = new ParsePosition(0);
        final String source = "1; 1; 1]";
        Assert.assertNull("Should not parse <"+source+">", realMatrixFormat.parse(source, pos));
        Assert.assertEquals(0, pos.getErrorIndex());
    }

    @Test
    public void testForgottenSeparator() {
        ParsePosition pos = new ParsePosition(0);
        final String source = "{{1, 1 1}}";
        Assert.assertNull("Should not parse <"+source+">", realMatrixFormat.parse(source, pos));
        Assert.assertEquals(7, pos.getErrorIndex());
    }

    @Test
    public void testForgottenSuffix() {
        ParsePosition pos = new ParsePosition(0);
        final String source = "{{1, 1, 1 ";
        Assert.assertNull("Should not parse <"+source+">", realMatrixFormat.parse(source, pos));
        Assert.assertEquals(9, pos.getErrorIndex());
    }
}

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