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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.text;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
@SuppressWarnings("deprecation")
/**
* @author arnej27959
*/
public class DoubleFormatterTestCase {
@Test
public void testZero() {
String zero = DoubleFormatter.stringValue(0.0);
//assertEquals("0.0", zero);
}
@Test
public void testOne() {
String one = DoubleFormatter.stringValue(1.0);
assertEquals("1.0", one);
}
@Test
public void testMinusOne() {
String one = DoubleFormatter.stringValue(-1.0);
assertEquals("-1.0", one);
}
@Test
public void testNanInf() {
String plusInf = DoubleFormatter.stringValue(Double.POSITIVE_INFINITY);
assertEquals("Infinity", plusInf);
String notAnum = DoubleFormatter.stringValue(Double.NaN);
assertEquals("NaN", notAnum);
String negInf = DoubleFormatter.stringValue(Double.NEGATIVE_INFINITY);
assertEquals("-Infinity", negInf);
}
@Test
public void testSeven() {
String seven = DoubleFormatter.stringValue(7.0);
assertEquals("7.0", seven);
seven = DoubleFormatter.stringValue(77.0);
assertEquals("77.0", seven);
seven = DoubleFormatter.stringValue(7777.0);
assertEquals("7777.0", seven);
seven = DoubleFormatter.stringValue(7777007777.0);
assertEquals("7.777007777E9", seven);
}
@Test
public void testSomeChosenNumbers() {
String s = DoubleFormatter.stringValue(4097.0);
assertEquals("4097.0", s);
s = DoubleFormatter.stringValue(4097.5);
assertEquals("4097.5", s);
s = DoubleFormatter.stringValue(1073741823.0);
assertEquals("1.073741823E9", s);
s = DoubleFormatter.stringValue(1073741823.5);
assertEquals("1.0737418235E9", s);
s = DoubleFormatter.stringValue(1073741825.5);
assertEquals("1.0737418255E9", s);
s = DoubleFormatter.stringValue(1.23456789012345669);
assertEquals("1.2345678901234567", s);
s = DoubleFormatter.stringValue(12.3456789012345673);
assertEquals("12.345678901234567", s);
s = DoubleFormatter.stringValue(123.456789012345666);
assertEquals("123.45678901234567", s);
s = DoubleFormatter.stringValue(1234.56789012345666);
assertEquals("1234.5678901234567", s);
s = DoubleFormatter.stringValue(12345.6789012345670);
assertEquals("12345.678901234567", s);
s = DoubleFormatter.stringValue(123456.789012345674);
assertEquals("123456.78901234567", s);
s = DoubleFormatter.stringValue(1234567.89012345671);
assertEquals("1234567.8901234567", s);
s = DoubleFormatter.stringValue(0.99);
// assertEquals("0.99", s);
s = DoubleFormatter.stringValue(0.5);
assertEquals("0.5", s);
s = DoubleFormatter.stringValue(0.1);
// assertEquals("0.1", s);
s = DoubleFormatter.stringValue(0.00123456789);
// assertEquals("0.00123456789", s);
s = DoubleFormatter.stringValue(0.0000000000001);
// assertEquals("0.0000000000001", s);
}
@Test
public void testPowersOfTwo() {
String twos = DoubleFormatter.stringValue(2.0);
assertEquals("2.0", twos);
twos = DoubleFormatter.stringValue(128.0);
assertEquals("128.0", twos);
twos = DoubleFormatter.stringValue(1048576.0);
assertEquals("1048576.0", twos);
twos = DoubleFormatter.stringValue(1073741824.0);
assertEquals("1.073741824E9", twos);
}
@Test
public void testSmallNumbers() {
for (double d = 1.0; d > 1.0e-200; d *= 0.75) {
String fs = DoubleFormatter.stringValue(d);
String vs = String.valueOf(d);
double rp = Double.valueOf(fs);
if (d != rp) {
// System.err.println("differs: "+d+" became "+fs+" then instead: "+rp+" diff: "+(d-rp));
} else if (! fs.equals(vs)) {
// System.err.println("string rep differs: "+vs+" became "+fs);
}
assertEquals(d, rp, 1.0e-7*d);
}
}
@Test
public void testVerySmallNumbers() {
for (double d = 1.0; d > 1.0e-200; d *= 0.5) {
String fs = DoubleFormatter.stringValue(d);
String vs = String.valueOf(d);
double rp = Double.valueOf(fs);
if (d != rp) {
// System.err.println("differs: "+d+" became "+fs+" then instead: "+rp+" diff: "+(d-rp));
} else if (! fs.equals(vs)) {
// System.err.println("string rep differs: "+vs+" became "+fs);
}
assertEquals(d, rp, 1.0e-13*d);
}
}
@Test
public void testVeryVerySmallNumbers() {
for (double d = 1.0e-200; d > 0; d *= 0.5) {
String fs = DoubleFormatter.stringValue(d);
String vs = String.valueOf(d);
double rp = Double.valueOf(fs);
if (d != rp) {
// System.err.println("differs: "+d+" became "+fs+" then instead: "+rp+" diff: "+(d-rp));
} else if (! fs.equals(vs)) {
// System.err.println("string rep differs: "+vs+" became "+fs);
}
assertEquals(d, rp, 1.0e-13*d);
}
}
@Test
public void testVeryBigNumbers() {
for (double d = 1.0; d < Double.POSITIVE_INFINITY; d *= 2.0) {
String fs = DoubleFormatter.stringValue(d);
String vs = String.valueOf(d);
double rp = Double.valueOf(fs);
if (d != rp) {
// System.err.println("differs: "+d+" became "+fs+" then instead: "+rp);
} else if (! fs.equals(vs)) {
// System.err.println("string rep differs: "+vs+" became "+fs);
}
assertEquals(d, rp, 1.0e-13*d);
}
assertEquals("1.0E200", String.valueOf(1.0e+200));
String big = DoubleFormatter.stringValue(1.0e+200);
assertEquals("1.0E200", big);
big = DoubleFormatter.stringValue(1.0e+298);
assertEquals("1.0E298", big);
big = DoubleFormatter.stringValue(1.0e+299);
assertEquals("1.0E299", big);
big = DoubleFormatter.stringValue(1.0e+300);
assertEquals("1.0E300", big);
}
@Test
public void testRandomNumbers() {
java.util.Random rgen = new java.util.Random(0xCafeBabe);
for (int i = 0; i < 123456; i++) {
double d = rgen.nextDouble();
}
}
}
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