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Java example source code file (ComplexFormatAbstractTest.java)

This example Java source code file (ComplexFormatAbstractTest.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

complex, complexformat, complexformatabstracttest, double, infinity, locale, nan, numberformat, parseposition, string, test, text, util

The ComplexFormatAbstractTest.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.complex;

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.util.FastMath;

public abstract class ComplexFormatAbstractTest {

    ComplexFormat complexFormat = null;
    ComplexFormat complexFormatJ = null;

    protected abstract Locale getLocale();

    protected abstract char getDecimalCharacter();

    protected ComplexFormatAbstractTest() {
        complexFormat = ComplexFormat.getInstance(getLocale());
        complexFormatJ = ComplexFormat.getInstance("j", getLocale());
    }

    @Test
    public void testSimpleNoDecimals() {
        Complex c = new Complex(1, 2);
        String expected = "1 + 2i";
        String actual = complexFormat.format(c);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testTrimOneImaginary() {
        final ComplexFormat fmt = ComplexFormat.getInstance(getLocale());
        fmt.getImaginaryFormat().setMaximumFractionDigits(1);

        Complex c = new Complex(1, 1.04);
        String expected = "1 + i";
        String actual = fmt.format(c);
        Assert.assertEquals(expected, actual);

        c = new Complex(1, 1.09);
        expected = "1 + 1" + getDecimalCharacter() + "1i";
        actual = fmt.format(c);
        Assert.assertEquals(expected, actual);

        c = new Complex(1, -1.09);
        expected = "1 - 1" + getDecimalCharacter() + "1i";
        actual = fmt.format(c);
        Assert.assertEquals(expected, actual);

        c = new Complex(1, -1.04);
        expected = "1 - i";
        actual = fmt.format(c);
        Assert.assertEquals(expected, actual);
    }

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

    @Test
    public void testSimpleWithDecimalsTrunc() {
        Complex c = new Complex(1.232323232323, 1.434343434343);
        String expected = "1" + getDecimalCharacter() + "2323232323 + 1" + getDecimalCharacter() + "4343434343i";
        String actual = complexFormat.format(c);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testNegativeReal() {
        Complex c = new Complex(-1.232323232323, 1.43);
        String expected = "-1" + getDecimalCharacter() + "2323232323 + 1" + getDecimalCharacter() + "43i";
        String actual = complexFormat.format(c);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testNegativeImaginary() {
        Complex c = new Complex(1.23, -1.434343434343);
        String expected = "1" + getDecimalCharacter() + "23 - 1" + getDecimalCharacter() + "4343434343i";
        String actual = complexFormat.format(c);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testNegativeBoth() {
        Complex c = new Complex(-1.232323232323, -1.434343434343);
        String expected = "-1" + getDecimalCharacter() + "2323232323 - 1" + getDecimalCharacter() + "4343434343i";
        String actual = complexFormat.format(c);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testZeroReal() {
        Complex c = new Complex(0.0, -1.434343434343);
        String expected = "0 - 1" + getDecimalCharacter() + "4343434343i";
        String actual = complexFormat.format(c);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testZeroImaginary() {
        Complex c = new Complex(30.23333333333, 0);
        String expected = "30" + getDecimalCharacter() + "2333333333";
        String actual = complexFormat.format(c);
        Assert.assertEquals(expected, actual);
    }

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

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

        Complex c = new Complex(232.22222222222, -342.3333333333);
        String expected = "232" + getDecimalCharacter() + "2222222222 - 342" + getDecimalCharacter() + "3333333333i";
        String actual = (new ComplexFormat()).format(c);
        Assert.assertEquals(expected, actual);

        Locale.setDefault(defaultLocal);
    }

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

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

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

    @Test
    public void testParseSimpleNoDecimals() {
        String source = "1 + 1i";
        Complex expected = new Complex(1, 1);
        Complex actual = complexFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseSimpleWithDecimals() {
        String source = "1" + getDecimalCharacter() + "23 + 1" + getDecimalCharacter() + "43i";
        Complex expected = new Complex(1.23, 1.43);
        Complex actual = complexFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseSimpleWithDecimalsTrunc() {
        String source = "1" + getDecimalCharacter() + "232323232323 + 1" + getDecimalCharacter() + "434343434343i";
        Complex expected = new Complex(1.232323232323, 1.434343434343);
        Complex actual = complexFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseNegativeReal() {
        String source = "-1" + getDecimalCharacter() + "232323232323 + 1" + getDecimalCharacter() + "4343i";
        Complex expected = new Complex(-1.232323232323, 1.4343);
        Complex actual = complexFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseNegativeImaginary() {
        String source = "1" + getDecimalCharacter() + "2323 - 1" + getDecimalCharacter() + "434343434343i";
        Complex expected = new Complex(1.2323, -1.434343434343);
        Complex actual = complexFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseNegativeBoth() {
        String source = "-1" + getDecimalCharacter() + "232323232323 - 1" + getDecimalCharacter() + "434343434343i";
        Complex expected = new Complex(-1.232323232323, -1.434343434343);
        Complex actual = complexFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseZeroReal() {
        String source = "0" + getDecimalCharacter() + "0 - 1" + getDecimalCharacter() + "4343i";
        Complex expected = new Complex(0.0, -1.4343);
        Complex actual = complexFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseZeroImaginary() {
        String source = "-1" + getDecimalCharacter() + "2323";
        Complex expected = new Complex(-1.2323, 0);
        Complex actual = complexFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseDifferentImaginaryChar() {
        String source = "-1" + getDecimalCharacter() + "2323 - 1" + getDecimalCharacter() + "4343j";
        Complex expected = new Complex(-1.2323, -1.4343);
        Complex actual = complexFormatJ.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParseNan() {
        String source = "(NaN) + (NaN)i";
        Complex expected = new Complex(Double.NaN, Double.NaN);
        Complex actual = complexFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testParsePositiveInfinity() {
        String source = "(Infinity) + (Infinity)i";
        Complex expected = new Complex(Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY);
        Complex actual = complexFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

    @Test
    public void testPaseNegativeInfinity() {
        String source = "(-Infinity) - (Infinity)i";
        Complex expected = new Complex(Double.NEGATIVE_INFINITY, Double.NEGATIVE_INFINITY);
        Complex actual = complexFormat.parse(source);
        Assert.assertEquals(expected, actual);
    }

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

    @Test
    public void testGetImaginaryFormat() {
        NumberFormat nf = NumberFormat.getInstance();
        ComplexFormat cf = new ComplexFormat(nf);
        Assert.assertSame(nf, cf.getImaginaryFormat());
    }

    @Test
    public void testGetRealFormat() {
        NumberFormat nf = NumberFormat.getInstance();
        ComplexFormat cf = new ComplexFormat(nf);
        Assert.assertSame(nf, cf.getRealFormat());
    }

    @Test
    public void testFormatNumber() {
        ComplexFormat cf = ComplexFormat.getInstance(getLocale());
        Double pi = Double.valueOf(FastMath.PI);
        String text = cf.format(pi);
        Assert.assertEquals("3" + getDecimalCharacter() + "1415926536", text);
    }

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

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