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Java example source code file (RealVectorFormatAbstractTest.java)

This example Java source code file (RealVectorFormatAbstractTest.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

arrayrealvector, expecting, infinity, locale, mathparseexception, nan, numberformat, parseposition, realvectorformat, realvectorformatabstracttest, should, string, test, text, util

The RealVectorFormatAbstractTest.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.Test;
import org.junit.Assert;

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

public abstract class RealVectorFormatAbstractTest {

    RealVectorFormat realVectorFormat = null;
    RealVectorFormat realVectorFormatSquare = null;

    protected abstract Locale getLocale();

    protected abstract char getDecimalCharacter();

    public RealVectorFormatAbstractTest() {
        realVectorFormat = RealVectorFormat.getInstance(getLocale());
        final NumberFormat nf = NumberFormat.getInstance(getLocale());
        nf.setMaximumFractionDigits(2);
        realVectorFormatSquare = new RealVectorFormat("[", "]", " : ", nf);
    }

    @Test
    public void testSimpleNoDecimals() {
        ArrayRealVector c = new ArrayRealVector(new double[] {1, 1, 1});
        String expected = "{1; 1; 1}";
        String actual = realVectorFormat.format(c);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testSimpleWithDecimals() {
        ArrayRealVector c = new ArrayRealVector(new double[] {1.23, 1.43, 1.63});
        String expected =
            "{1"    + getDecimalCharacter() +
            "23; 1" + getDecimalCharacter() +
            "43; 1" + getDecimalCharacter() +
            "63}";
        String actual = realVectorFormat.format(c);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testSimpleWithDecimalsTrunc() {
        ArrayRealVector c = new ArrayRealVector(new double[] {1.232323232323, 1.43434343434343, 1.633333333333});
        String expected =
            "{1"    + getDecimalCharacter() +
            "2323232323; 1" + getDecimalCharacter() +
            "4343434343; 1" + getDecimalCharacter() +
            "6333333333}";
        String actual = realVectorFormat.format(c);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testNegativeX() {
        ArrayRealVector c = new ArrayRealVector(new double[] {-1.232323232323, 1.43, 1.63});
        String expected =
            "{-1"    + getDecimalCharacter() +
            "2323232323; 1" + getDecimalCharacter() +
            "43; 1" + getDecimalCharacter() +
            "63}";
        String actual = realVectorFormat.format(c);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testNegativeY() {
        ArrayRealVector c = new ArrayRealVector(new double[] {1.23, -1.434343434343, 1.63});
        String expected =
            "{1"    + getDecimalCharacter() +
            "23; -1" + getDecimalCharacter() +
            "4343434343; 1" + getDecimalCharacter() +
            "63}";
        String actual = realVectorFormat.format(c);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testNegativeZ() {
        ArrayRealVector c = new ArrayRealVector(new double[] {1.23, 1.43, -1.633333333333});
        String expected =
            "{1"    + getDecimalCharacter() +
            "23; 1" + getDecimalCharacter() +
            "43; -1" + getDecimalCharacter() +
            "6333333333}";
        String actual = realVectorFormat.format(c);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testNonDefaultSetting() {
        ArrayRealVector c = new ArrayRealVector(new double[] {1, 1, 1});
        String expected = "[1 : 1 : 1]";
        String actual = realVectorFormatSquare.format(c);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testDefaultFormatRealVectorImpl() {
        Locale defaultLocal = Locale.getDefault();
        Locale.setDefault(getLocale());

        ArrayRealVector c = new ArrayRealVector(new double[] {232.22222222222, -342.3333333333, 432.44444444444});
        String expected =
            "{232"    + getDecimalCharacter() +
            "2222222222; -342" + getDecimalCharacter() +
            "3333333333; 432" + getDecimalCharacter() +
            "4444444444}";
        String actual = (new RealVectorFormat()).format(c);
        Assert.assertEquals(expected, actual);

        Locale.setDefault(defaultLocal);
    }

    @Test
    public void testNan() {
        ArrayRealVector c = new ArrayRealVector(new double[] {Double.NaN, Double.NaN, Double.NaN});
        String expected = "{(NaN); (NaN); (NaN)}";
        String actual = realVectorFormat.format(c);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testPositiveInfinity() {
        ArrayRealVector c = new ArrayRealVector(new double[] {
                Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY
        });
        String expected = "{(Infinity); (Infinity); (Infinity)}";
        String actual = realVectorFormat.format(c);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void tesNegativeInfinity() {
        ArrayRealVector c = new ArrayRealVector(new double[] {
                Double.NEGATIVE_INFINITY, Double.NEGATIVE_INFINITY, Double.NEGATIVE_INFINITY
        });
        String expected = "{(-Infinity); (-Infinity); (-Infinity)}";
        String actual = realVectorFormat.format(c);
        Assert.assertEquals(expected, actual);
    }

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

    @Test
    public void testParseIgnoredWhitespace() {
        ArrayRealVector expected = new ArrayRealVector(new double[] {1, 1, 1});
        ParsePosition pos1 = new ParsePosition(0);
        String source1 = "{1;1;1}";
        Assert.assertEquals(expected, realVectorFormat.parse(source1, pos1));
        Assert.assertEquals(source1.length(), pos1.getIndex());
        ParsePosition pos2 = new ParsePosition(0);
        String source2 = " { 1 ; 1 ; 1 } ";
        Assert.assertEquals(expected, realVectorFormat.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}";
        ArrayRealVector expected = new ArrayRealVector(new double[] {1.23, 1.43, 1.63});
        ArrayRealVector actual = realVectorFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

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

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

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

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

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

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

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

    @Test
    public void testParseNan() {
        String source = "{(NaN); (NaN); (NaN)}";
        ArrayRealVector actual = realVectorFormat.parse(source);
        Assert.assertEquals(new ArrayRealVector(new double[] {Double.NaN, Double.NaN, Double.NaN}), actual);
    }

    @Test
    public void testParsePositiveInfinity() {
        String source = "{(Infinity); (Infinity); (Infinity)}";
        ArrayRealVector actual = realVectorFormat.parse(source);
        Assert.assertEquals(new ArrayRealVector(new double[] {
                Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY
        }), actual);
    }

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

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

    @Test
    public void testParseManyComponents() {
        ArrayRealVector parsed = realVectorFormat.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.getDimension());
    }

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

    @Test
    public void testForgottenPrefix() {
        ParsePosition pos = new ParsePosition(0);
        final String source = "1; 1; 1}";
        Assert.assertNull("Should not parse <"+source+">",new RealVectorFormat().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+">",new RealVectorFormat().parse(source, pos));
        Assert.assertEquals(6, pos.getErrorIndex());
    }

    @Test
    public void testForgottenSuffix() {
        ParsePosition pos = new ParsePosition(0);
        final String source = "{1; 1; 1 ";
        Assert.assertNull("Should not parse <"+source+">",new RealVectorFormat().parse(source, pos));
        Assert.assertEquals(8, pos.getErrorIndex());
    }
}

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