BigDecimalConverterWithScaleTest_roundtrip.java

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 *  to you under the Apache License, Version 2.0 (the
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package org.apache.isis.viewer.wicket.ui.components.scalars.jdkmath;

import java.math.BigDecimal;
import java.util.Locale;

import org.apache.wicket.util.convert.ConversionException;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;

public class BigDecimalConverterWithScaleTest_roundtrip {

    final BigDecimal bd_123_45_scale2 = new BigDecimal("123.45").setScale(2);
    final BigDecimal bd_123_4500_scale2 = new BigDecimal("123.4500").setScale(2);

    final BigDecimal bd_789123_45_scale2 = new BigDecimal("789123.45").setScale(2);

    final BigDecimal bd_123_45_scale4 = new BigDecimal("123.45").setScale(4);
    final BigDecimal bd_123_4500_scale4 = new BigDecimal("123.4500").setScale(4);
    
    private BigDecimalConverterWithScale converter;

    @Rule
    public ExpectedException exception = ExpectedException.none();
    
    @Before
    public void setUp() throws Exception {
        converter = newConverter(2);
    }
    
    @Test
    public void scale2_english() {
        
        // when
        final BigDecimal actual = converter.convertToObject("123.45", Locale.ENGLISH);
        Assert.assertEquals(bd_123_4500_scale2, actual);
        Assert.assertEquals(bd_123_45_scale2, actual);
        
        Assert.assertNotEquals(bd_123_4500_scale4, actual);
        Assert.assertNotEquals(bd_123_45_scale4, actual);

        // when
        String actualStr = converter.convertToString(actual, Locale.ENGLISH);
        Assert.assertEquals("123.45", actualStr);
    }
    
    @Test
    public void scale4_english() {
        converter = newConverter(4);
        
        final BigDecimal actual = converter.convertToObject("123.45", Locale.ENGLISH);
        Assert.assertNotEquals(bd_123_4500_scale2, actual);
        Assert.assertNotEquals(bd_123_45_scale2, actual);
        
        Assert.assertEquals(bd_123_4500_scale4, actual);
        Assert.assertEquals(bd_123_45_scale4, actual);
        
        // when
        String actualStr = converter.convertToString(actual, Locale.ENGLISH);
        Assert.assertEquals("123.4500", actualStr);
    }
    
    
    @Test
    public void scaleNull_english() {
        converter = newConverter(null);
        
        final BigDecimal actual = converter.convertToObject("123.45", Locale.ENGLISH);
        Assert.assertEquals(bd_123_4500_scale2, actual);
        Assert.assertEquals(bd_123_45_scale2, actual);
        
        final BigDecimal actual2 = converter.convertToObject("123.4500", Locale.ENGLISH);
        Assert.assertEquals(bd_123_4500_scale4, actual2);
        Assert.assertEquals(bd_123_45_scale4, actual2);
    }
    
    
    @Test
    public void scale2_italian() {
        
        final BigDecimal actual = converter.convertToObject("123,45", Locale.ITALIAN);
        Assert.assertEquals(bd_123_4500_scale2, actual);
        Assert.assertEquals(bd_123_45_scale2, actual);
        
        Assert.assertNotEquals(bd_123_4500_scale4, actual);
        Assert.assertNotEquals(bd_123_45_scale4, actual);
    }

    
    @Test
    public void scale2_english_withThousandSeparators() {
        
        exception.expect(ConversionException.class);
        exception.expectMessage("Thousands separator ',' is not allowed in input");
        
        converter.convertToObject("789,123.45", Locale.ENGLISH);
    }

    @Test
    public void scale2_english_withoutThousandSeparators() {
        
        // when
        final BigDecimal actual = converter.convertToObject("789123.45", Locale.ENGLISH);
        Assert.assertEquals(bd_789123_45_scale2, actual);
        
        // when
        String actualStr = converter.convertToString(actual, Locale.ENGLISH);
        Assert.assertEquals("789123.45", actualStr);
    }

    @Test
    public void scale2_english_tooLargeScale() {
        
        exception.expect(ConversionException.class);
        exception.expectMessage("No more than 2 digits can be entered after the decimal place");
        
        converter.convertToObject("123.454", Locale.ENGLISH);
    }

    private BigDecimalConverterWithScale newConverter(Integer scale) {
        return new BigDecimalConverterWithScale(scale);
    }

}