Commons Math example source code file (ComplexFormatAbstractTest.java)

This example Commons Math source code file (ComplexFormatAbstractTest.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

complex, complex, complexformat, complexformat, compositeformat, illegalargumentexception, infinity, nan, numberformat, parseexception, parseexception, parseposition, string, string, text, util

The Commons Math ComplexFormatAbstractTest.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.complex;

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

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

import junit.framework.TestCase;

public abstract class ComplexFormatAbstractTest extends TestCase {

    CompositeFormat complexFormat = null;
    ComplexFormat complexFormatJ = null;

    protected abstract Locale getLocale();

    protected abstract char getDecimalCharacter();

    @Override
    protected void setUp() throws Exception {
        complexFormat = ComplexFormat.getInstance(getLocale());
        complexFormatJ = ComplexFormat.getInstance(getLocale());
        complexFormatJ.setImaginaryCharacter("j");
    }

    public void testSimpleNoDecimals() {
        Complex c = new Complex(1, 1);
        String expected = "1 + 1i";
        String actual = complexFormat.format(c);
        assertEquals(expected, actual);
    }

    public void testSimpleWithDecimals() {
        Complex c = new Complex(1.23, 1.43);
        String expected = "1" + getDecimalCharacter() + "23 + 1" + getDecimalCharacter() + "43i";
        String actual = complexFormat.format(c);
        assertEquals(expected, actual);
    }

    public void testSimpleWithDecimalsTrunc() {
        Complex c = new Complex(1.2323, 1.4343);
        String expected = "1" + getDecimalCharacter() + "23 + 1" + getDecimalCharacter() + "43i";
        String actual = complexFormat.format(c);
        assertEquals(expected, actual);
    }

    public void testNegativeReal() {
        Complex c = new Complex(-1.2323, 1.4343);
        String expected = "-1" + getDecimalCharacter() + "23 + 1" + getDecimalCharacter() + "43i";
        String actual = complexFormat.format(c);
        assertEquals(expected, actual);
    }

    public void testNegativeImaginary() {
        Complex c = new Complex(1.2323, -1.4343);
        String expected = "1" + getDecimalCharacter() + "23 - 1" + getDecimalCharacter() + "43i";
        String actual = complexFormat.format(c);
        assertEquals(expected, actual);
    }

    public void testNegativeBoth() {
        Complex c = new Complex(-1.2323, -1.4343);
        String expected = "-1" + getDecimalCharacter() + "23 - 1" + getDecimalCharacter() + "43i";
        String actual = complexFormat.format(c);
        assertEquals(expected, actual);
    }

    public void testZeroReal() {
        Complex c = new Complex(0.0, -1.4343);
        String expected = "0 - 1" + getDecimalCharacter() + "43i";
        String actual = complexFormat.format(c);
        assertEquals(expected, actual);
    }

    public void testZeroImaginary() {
        Complex c = new Complex(30.233, 0);
        String expected = "30" + getDecimalCharacter() + "23";
        String actual = complexFormat.format(c);
        assertEquals(expected, actual);
    }

    public void testDifferentImaginaryChar() {
        Complex c = new Complex(1, 1);
        String expected = "1 + 1j";
        String actual = complexFormatJ.format(c);
        assertEquals(expected, actual);
    }

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

        Complex c = new Complex(232.222, -342.33);
        String expected = "232" + getDecimalCharacter() + "22 - 342" + getDecimalCharacter() + "33i";
        String actual = ComplexFormat.formatComplex(c);
        assertEquals(expected, actual);

        Locale.setDefault(defaultLocal);
    }

    public void testNan() {
        Complex c = new Complex(Double.NaN, Double.NaN);
        String expected = "(NaN) + (NaN)i";
        String actual = complexFormat.format(c);
        assertEquals(expected, actual);
    }

    public void testPositiveInfinity() {
        Complex c = new Complex(Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY);
        String expected = "(Infinity) + (Infinity)i";
        String actual = complexFormat.format(c);
        assertEquals(expected, actual);
    }

    public void testNegativeInfinity() {
        Complex c = new Complex(Double.NEGATIVE_INFINITY, Double.NEGATIVE_INFINITY);
        String expected = "(-Infinity) - (Infinity)i";
        String actual = complexFormat.format(c);
        assertEquals(expected, actual);
    }

    public void testParseSimpleNoDecimals() {
        String source = "1 + 1i";
        Complex expected = new Complex(1, 1);
        try {
            Complex actual = (Complex)complexFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    public void testParseSimpleWithDecimals() {
        String source = "1" + getDecimalCharacter() + "23 + 1" + getDecimalCharacter() + "43i";
        Complex expected = new Complex(1.23, 1.43);
        try {
            Complex actual = (Complex)complexFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    public void testParseSimpleWithDecimalsTrunc() {
        String source = "1" + getDecimalCharacter() + "2323 + 1" + getDecimalCharacter() + "4343i";
        Complex expected = new Complex(1.2323, 1.4343);
        try {
            Complex actual = (Complex)complexFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    public void testParseNegativeReal() {
        String source = "-1" + getDecimalCharacter() + "2323 + 1" + getDecimalCharacter() + "4343i";
        Complex expected = new Complex(-1.2323, 1.4343);
        try {
            Complex actual = (Complex)complexFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    public void testParseNegativeImaginary() {
        String source = "1" + getDecimalCharacter() + "2323 - 1" + getDecimalCharacter() + "4343i";
        Complex expected = new Complex(1.2323, -1.4343);
        try {
            Complex actual = (Complex)complexFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    public void testParseNegativeBoth() {
        String source = "-1" + getDecimalCharacter() + "2323 - 1" + getDecimalCharacter() + "4343i";
        Complex expected = new Complex(-1.2323, -1.4343);
        try {
            Complex actual = (Complex)complexFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    public void testParseZeroReal() {
        String source = "0" + getDecimalCharacter() + "0 - 1" + getDecimalCharacter() + "4343i";
        Complex expected = new Complex(0.0, -1.4343);
        try {
            Complex actual = (Complex)complexFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    public void testParseZeroImaginary() {
        String source = "-1" + getDecimalCharacter() + "2323";
        Complex expected = new Complex(-1.2323, 0);
        try {
            Complex actual = (Complex)complexFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    public void testParseDifferentImaginaryChar() {
        String source = "-1" + getDecimalCharacter() + "2323 - 1" + getDecimalCharacter() + "4343j";
        Complex expected = new Complex(-1.2323, -1.4343);
        try {
            Complex actual = (Complex)complexFormatJ.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    public void testParseNan() {
        String source = "(NaN) + (NaN)i";
        Complex expected = new Complex(Double.NaN, Double.NaN);
        try {
            Complex actual = (Complex)complexFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    public void testParsePositiveInfinity() {
        String source = "(Infinity) + (Infinity)i";
        Complex expected = new Complex(Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY);
        try {
            Complex actual = (Complex)complexFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

    public void testPaseNegativeInfinity() {
        String source = "(-Infinity) - (Infinity)i";
        Complex expected = new Complex(Double.NEGATIVE_INFINITY, Double.NEGATIVE_INFINITY);
        try {
            Complex actual = (Complex)complexFormat.parseObject(source);
            assertEquals(expected, actual);
        } catch (ParseException ex) {
            fail(ex.getMessage());
        }
    }

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

    public void testGetImaginaryFormat() {
        NumberFormat nf = NumberFormat.getInstance();
        ComplexFormat cf = new ComplexFormat();

        assertNotSame(nf, cf.getImaginaryFormat());
        cf.setImaginaryFormat(nf);
        assertSame(nf, cf.getImaginaryFormat());
    }

    public void testSetImaginaryFormatNull() {
        try {
            ComplexFormat cf = new ComplexFormat();
            cf.setImaginaryFormat(null);
            fail();
        } catch (IllegalArgumentException ex) {
            // success
        }
    }

    public void testSetRealFormatNull() {
        try {
            ComplexFormat cf = new ComplexFormat();
            cf.setRealFormat(null);
            fail();
        } catch (IllegalArgumentException ex) {
            // success
        }
    }

    public void testGetRealFormat() {
        NumberFormat nf = NumberFormat.getInstance();
        ComplexFormat cf = new ComplexFormat();

        assertNotSame(nf, cf.getRealFormat());
        cf.setRealFormat(nf);
        assertSame(nf, cf.getRealFormat());
    }

    public void testSetImaginaryCharacterNull() {
        try {
            ComplexFormat cf = new ComplexFormat();
            cf.setImaginaryCharacter(null);
            fail();
        } catch (IllegalArgumentException ex) {
            // success
        }
    }

    public void testSetImaginaryCharacterEmpty() {
        try {
            ComplexFormat cf = new ComplexFormat();
            cf.setImaginaryCharacter("");
            fail();
        } catch (IllegalArgumentException ex) {
            // success
        }
    }

    public void testFormatNumber() {
        CompositeFormat cf = ComplexFormat.getInstance(getLocale());
        Double pi = Double.valueOf(Math.PI);
        String text = cf.format(pi);
        assertEquals("3" + getDecimalCharacter() + "14", text);
    }

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

    public void testForgottenImaginaryCharacter() {
        ParsePosition pos = new ParsePosition(0);
        assertNull(new ComplexFormat().parse("1 + 1", pos));
        assertEquals(5, pos.getErrorIndex());
    }
}