spring-soap/java-numbers/src/test/java/com/baeldung/string/DoubleToStringUnitTest.java

package com.baeldung.string;

import static org.assertj.core.api.Assertions.assertThat;

import org.junit.Test;

public class DoubleToStringUnitTest {
    
    private static final double DOUBLE_VALUE = 3.56;
    private static final String TRUNCATED_DOUBLE = "3";
    private static final String ROUNDED_UP_DOUBLE = "4";
    
    
    @Test
    public void truncateByCastTest() {
        assertThat(DoubleToString.truncateByCast(DOUBLE_VALUE)).isEqualTo(TRUNCATED_DOUBLE);
    }
    
    @Test
    public void roundingWithStringFormatTest() {
        assertThat(DoubleToString.roundWithStringFormat(DOUBLE_VALUE)).isEqualTo(ROUNDED_UP_DOUBLE);
    }

    @Test
    public void truncateWithNumberFormatTest() {
        assertThat(DoubleToString.truncateWithNumberFormat(DOUBLE_VALUE)).isEqualTo(TRUNCATED_DOUBLE);
    }
    
    @Test
    public void roundWithNumberFormatTest() {
        assertThat(DoubleToString.roundWithNumberFormat(DOUBLE_VALUE)).isEqualTo(ROUNDED_UP_DOUBLE);
    }

    @Test
    public void truncateWithDecimalFormatTest() {
        assertThat(DoubleToString.truncateWithDecimalFormat(DOUBLE_VALUE)).isEqualTo(TRUNCATED_DOUBLE);
    }
    
    @Test
    public void roundWithDecimalFormatTest() {
        assertThat(DoubleToString.roundWithDecimalFormat(DOUBLE_VALUE)).isEqualTo(ROUNDED_UP_DOUBLE);
    }


}