Commons Math example source code file (RealVectorFormatAbstractTest.java)

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

Java - Commons Math tags/keywords

arrayrealvector, arrayrealvector, exception, infinity, infinity, locale, nan, parseexception, parseexception, parseposition, realvectorformat, should, string, string, text, util

The Commons Math RealVectorFormatAbstractTest.java 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.math.linear;

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

import junit.framework.TestCase;

import org.apache.commons.math.util.CompositeFormat;

public abstract class RealVectorFormatAbstractTest extends TestCase {

    RealVectorFormat realVectorFormat = null;
    RealVectorFormat realVectorFormatSquare = null;

    protected abstract Locale getLocale();

    protected abstract char getDecimalCharacter();

    @Override
    public void setUp() throws Exception {
        realVectorFormat = RealVectorFormat.getInstance(getLocale());
        final NumberFormat nf = NumberFormat.getInstance(getLocale());
        nf.setMaximumFractionDigits(2);
        realVectorFormatSquare = new RealVectorFormat("[", "]", " : ", nf);
    }

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

    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);
        assertEquals(expected, actual);
    }

    public void testSimpleWithDecimalsTrunc() {
        ArrayRealVector c = new ArrayRealVector(new double[] {1.2323, 1.4343, 1.6333});
        String expected =
            "{1"    + getDecimalCharacter() +
            "23; 1" + getDecimalCharacter() +
            "43; 1" + getDecimalCharacter() +
            "63}";
        String actual = realVectorFormat.format(c);
        assertEquals(expected, actual);
    }

    public void testNegativeX() {
        ArrayRealVector c = new ArrayRealVector(new double[] {-1.2323, 1.4343, 1.6333});
        String expected =
            "{-1"    + getDecimalCharacter() +
            "23; 1" + getDecimalCharacter() +
            "43; 1" + getDecimalCharacter() +
            "63}";
        String actual = realVectorFormat.format(c);
        assertEquals(expected, actual);
    }

    public void testNegativeY() {
        ArrayRealVector c = new ArrayRealVector(new double[] {1.2323, -1.4343, 1.6333});
        String expected =
            "{1"    + getDecimalCharacter() +
            "23; -1" + getDecimalCharacter() +
            "43; 1" + getDecimalCharacter() +
            "63}";
        String actual = realVectorFormat.format(c);
        assertEquals(expected, actual);
    }

    public void testNegativeZ() {
        ArrayRealVector c = new ArrayRealVector(new double[] {1.2323, 1.4343, -1.6333});
        String expected =
            "{1"    + getDecimalCharacter() +
            "23; 1" + getDecimalCharacter() +
            "43; -1" + getDecimalCharacter() +
            "63}";
        String actual = realVectorFormat.format(c);
        assertEquals(expected, actual);
    }

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

    public void testStaticFormatRealVectorImpl() {
        Locale defaultLocal = Locale.getDefault();
        Locale.setDefault(getLocale());

        ArrayRealVector c = new ArrayRealVector(new double[] {232.222, -342.33, 432.444});
        String expected =
            "{232"    + getDecimalCharacter() +
            "22; -342" + getDecimalCharacter() +
            "33; 432" + getDecimalCharacter() +
            "44}";
        String actual = RealVectorFormat.formatRealVector(c);
        assertEquals(expected, actual);

        Locale.setDefault(defaultLocal);
    }

    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);
        assertEquals(expected, actual);
    }

    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);
        assertEquals(expected, actual);
    }

    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);
        assertEquals(expected, actual);
    }

    public void testParseSimpleNoDecimals() {
        String source = "{1; 1; 1}";
        ArrayRealVector expected = new ArrayRealVector(new double[] {1, 1, 1});
        try {
            ArrayRealVector actual = (ArrayRealVector) realVectorFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    public void testParseIgnoredWhitespace() {
        ArrayRealVector expected = new ArrayRealVector(new double[] {1, 1, 1});
        ParsePosition pos1 = new ParsePosition(0);
        String source1 = "{1;1;1}";
        assertEquals(expected, realVectorFormat.parseObject(source1, pos1));
        assertEquals(source1.length(), pos1.getIndex());
        ParsePosition pos2 = new ParsePosition(0);
        String source2 = " { 1 ; 1 ; 1 } ";
        assertEquals(expected, realVectorFormat.parseObject(source2, pos2));
        assertEquals(source2.length() - 1, pos2.getIndex());
    }

    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});
        try {
            ArrayRealVector actual = (ArrayRealVector) realVectorFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    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});
        try {
            ArrayRealVector actual = (ArrayRealVector) realVectorFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    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});
        try {
            ArrayRealVector actual = (ArrayRealVector) realVectorFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    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});
        try {
            ArrayRealVector actual = (ArrayRealVector) realVectorFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    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});
        try {
            ArrayRealVector actual = (ArrayRealVector) realVectorFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    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});
        try {
            ArrayRealVector actual = (ArrayRealVector) realVectorFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    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});
        try {
            ArrayRealVector actual = (ArrayRealVector) realVectorFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    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});
        try {
            ArrayRealVector actual = (ArrayRealVector) realVectorFormatSquare.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    public void testParseNan() {
        String source = "{(NaN); (NaN); (NaN)}";
        try {
            ArrayRealVector actual = (ArrayRealVector) realVectorFormat.parseObject(source);
            assertEquals(new ArrayRealVector(new double[] {Double.NaN, Double.NaN, Double.NaN}), actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    public void testParsePositiveInfinity() {
        String source = "{(Infinity); (Infinity); (Infinity)}";
        try {
            ArrayRealVector actual = (ArrayRealVector)realVectorFormat.parseObject(source);
            assertEquals(new ArrayRealVector(new double[] {
                    Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY
            }), actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    public void testParseNegativeInfinity() {
        String source = "{(-Infinity); (-Infinity); (-Infinity)}";
        try {
            ArrayRealVector actual = (ArrayRealVector)realVectorFormat.parseObject(source);
            assertEquals(new ArrayRealVector(new double[] {
                    Double.NEGATIVE_INFINITY, Double.NEGATIVE_INFINITY, Double.NEGATIVE_INFINITY
            }), actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    public void testParseNoComponents() {
        try {
            realVectorFormat.parseObject("{ }");
        } catch (ParseException pe) {
            // expected behavior
        } catch (Exception e) {
            fail("wrong exception caught");
        }
    }

    public void testParseManyComponents() throws ParseException {
        ArrayRealVector parsed =
            (ArrayRealVector) realVectorFormat.parseObject("{0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0;0}");
        assertEquals(24, parsed.getDimension());
    }

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

    public void testFormatObject() {
        try {
            CompositeFormat cf = new RealVectorFormat();
            Object object = new Object();
            cf.format(object);
            fail();
        } catch (IllegalArgumentException ex) {
            // success
        }
    }

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

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

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

}