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Restructured test using AsserJ library

This commit is contained in:
Marcin Krykowski 2020-05-27 16:34:21 +01:00
parent f05224a5a7
commit 6f496d0d5c
2 changed files with 23 additions and 52 deletions
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24
java-numbers/src/main/java/com/baeldung/formatNumber/FormatNumber.java
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@ -7,30 +7,6 @@ import java.text.NumberFormat;
import java.util.Locale;
public class FormatNumber {
private static final double D = 4.2352989244d;
private static final double F = 8.6994540927d;
public static void main(String[] args) {
System.out.println(D + " with Big Decimal (2 places) is " + withBigDecimal(D, 2));
System.out.println(D + " with Big Decimal (3 places) is " + withBigDecimal(D, 3));
System.out.println(F + " with Big Decimal (2 places) is " + withBigDecimal(F, 2));
System.out.println(F + " with Big Decimal (3 places) is " + withBigDecimal(F, 3));
System.out.println(D + " with Math.round is (2 places) " + withMathRound(D, 2));
System.out.println(D + " with Math.round is (3 places) " + withMathRound(D, 3));
System.out.println(F + " with Math.round is (2 places) " + withMathRound(F, 2));
System.out.println(F + " with Math.round is (3 places) " + withMathRound(F, 3));
System.out.println(D + " with String Format is (2 places) " + withStringFormat(D, 2));
System.out.println(D + " with String Format is (3 places) " + withStringFormat(D, 3));
System.out.println(F + " with String Format is (2 places) " + withStringFormat(F, 2));
System.out.println(F + " with String Format is (3 places) " + withStringFormat(F, 3));
System.out.println(D + " with Decimal Format (local) is " + withDecimalFormatLocal(D));
System.out.println(D + " with Decimal Format (2 places) is " + withDecimalFormatPattern(D, 2));
System.out.println(D + " with Decimal Format (3 places) is " + withDecimalFormatPattern(D, 3));
System.out.println(F + " with Decimal Format is (local) " + withDecimalFormatLocal(F));
System.out.println(F + " with Decimal Format is (2 places) " + withDecimalFormatPattern(F, 2));
System.out.println(F + " with Decimal Format is (3 places) " + withDecimalFormatPattern(F, 3));
}
public static double withBigDecimal(double value, int places) {
if (places < 0)
throw new IllegalArgumentException();

51
java-numbers/src/test/java/com/baeldung/formatNumber/FormatNumberTest.java
View File

@ -1,42 +1,37 @@
package com.baeldung.formatNumber;
import org.apache.commons.math3.util.Precision;
import org.decimal4j.util.DoubleRounder;
import org.junit.Assert;
import org.junit.Test;
import static com.baeldung.formatNumber.FormatNumber.*;
import static org.assertj.core.api.Assertions.*;
public class FormatNumberTest {
private double value = 2.03456d;
private int places = 2;
private double expected = 2.03d;
private static final double D = 4.2352989244d;
private static final double F = 8.6994540927d;
@Test public void givenDecimalNumber_whenFormatNumberToNDecimalPlaces_thenGetExpectedResult() {
double delta = 0.0d;
Assert.assertEquals(expected, FormatNumber.withBigDecimal(value, places), delta);
Assert.assertEquals(expected, FormatNumber.withDecimalFormatPattern(value, places), delta);
Assert.assertEquals(expected, FormatNumber.withMathRound(value, places), delta);
places = 3;
expected = 2.035d;
assertThat(withBigDecimal(D, 2)).isEqualTo(4.24);
assertThat(withBigDecimal(D, 3)).isEqualTo(4.235);
assertThat(withBigDecimal(F, 2)).isEqualTo(8.7);
assertThat(withBigDecimal(F, 3)).isEqualTo(8.699);
Assert.assertEquals(expected, FormatNumber.withBigDecimal(value, places), delta);
Assert.assertEquals(expected, FormatNumber.withDecimalFormatPattern(value, places), delta);
Assert.assertEquals(expected, FormatNumber.withMathRound(value, places), delta);
assertThat(withMathRound(D, 2)).isEqualTo(4.24);
assertThat(withMathRound(D, 3)).isEqualTo(4.235);
assertThat(withMathRound(F, 2)).isEqualTo(8.7);
assertThat(withMathRound(F, 3)).isEqualTo(8.699);
value = 256.024d;
places = 2;
expected = 256.02d;
assertThat(withStringFormat(D, 2)).isEqualTo("4.24");
assertThat(withStringFormat(D, 3)).isEqualTo("4.235");
assertThat(withStringFormat(F, 2)).isEqualTo("8.70");
assertThat(withStringFormat(F, 3)).isEqualTo("8.699");
Assert.assertEquals(expected, FormatNumber.withBigDecimal(value, places), delta);
Assert.assertEquals(expected, FormatNumber.withDecimalFormatPattern(value, places), delta);
Assert.assertEquals(expected, FormatNumber.withMathRound(value, places), delta);
assertThat(withDecimalFormatLocal(D)).isEqualTo(4.235);
assertThat(withDecimalFormatLocal(F)).isEqualTo(8.699);
value = 260.773d;
places = 2;
expected = 260.77d;
Assert.assertEquals(expected, FormatNumber.withBigDecimal(value, places), delta);
Assert.assertEquals(expected, FormatNumber.withDecimalFormatPattern(value, places), delta);
Assert.assertEquals(expected, FormatNumber.withMathRound(value, places), delta);
assertThat(withDecimalFormatPattern(D, 2)).isEqualTo(4.24);
assertThat(withDecimalFormatPattern(D, 3)).isEqualTo(4.235);
assertThat(withDecimalFormatPattern(F, 2)).isEqualTo(8.7);
assertThat(withDecimalFormatPattern(F, 3)).isEqualTo(8.699);
}
}