Using Java to create the following classes below.

Create a class Mathematics.java that passes all the tests.

The MathematicsTest.java is below:

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import static org.junit.Assert.*; import java.util.HashSet; import org.junit.Test;

public class MathematicsTest { private Mathematics math; public MathematicsTest() { math = new Mathematics(); } @Test public void testPIValue() { assertEquals(3.14159, Mathematics.PI, 0.1); } @Test public void testFeetToKMRatioValue() { assertEquals(0.0003048, Mathematics.ONE_FOOT_TO_KILOMETER_RATIO, 0.1); } @Test public void testGetCircleArea1() { double area = math.getCircleArea(1.0); assertEquals(3.14159, area, 0.1); } @Test public void testGetCircleArea2() { double area = math.getCircleArea(15.0); assertEquals(706.85775, area, 0.1); }

@Test public void testGetSquareArea1() { double area = math.getSquareArea(2.0); assertEquals(4.0, area, 0.1); } @Test public void testGetSquareArea2() { double area = math.getSquareArea(32.0); assertEquals(1024.0, area, 0.1); }

@Test public void testAdd1() { double sum = math.add(6.0, 7.0); assertEquals(13.0, sum, 0.1); }

@Test public void testAdd2() { double sum = math.add(-6.0, 6.0); assertEquals(0.0, sum, 0.1); } @Test public void testTimes1() { double product = math.times(1.0, 5.0); assertEquals(5.0, product, 0.1); } @Test public void testTimes2() { double product = math.times(20.0, 20.0); assertEquals(400.0, product, 0.1); }

@Test public void testSubtract1() { double difference = math.subtract(0.0, 20.0); assertEquals(-20.0, difference, 0.1); }

@Test public void testSubtract2() { double difference = math.subtract(20.0, 20.0); assertEquals(0.0, difference, 0.1); }

@Test public void testDivide1() { int division = math.divide(20, 10); assertEquals(2, division); } @Test public void testDivide2() { int division = math.divide(20, 0); assertEquals(0, division); } @Test public void testAbsolute1() { int abs = math.absoluteValue(1); assertEquals(1, abs); } @Test public void testAbsolute2() { int abs = math.absoluteValue(-5000); assertEquals(5000, abs); } @Test public void testRandomNumberBetweenTenAndTwentyButNotFifteen() { HashSet values = new HashSet(); for(int i=0; i < 10000; i++) { int number = math.getRandomNumberBetweenTenAndTwentyButNotFifteen(); boolean lessThanTen = number < 10; boolean greaterThanTwenty = number > 20; boolean notFifteen = number == 15; assertFalse(lessThanTen); assertFalse(greaterThanTwenty); assertFalse(notFifteen); values.add(number); } assertEquals(10, values.size()); } @Test public void testFootToKM1() { double km = math.convertFeetToKilometers(1.0); assertEquals(0.0003048, km, 0.1); } @Test public void testFootToKM2() { double km = math.convertFeetToKilometers(892.0); assertEquals(0.272186, km, 0.1); }

@Test public void testDoubleTheNumber1(){ Integer number = new Integer(5); Integer answer = math.doubleTheNumber(number); assertEquals((Integer)10, answer); }

@Test public void testDoubleTheNumber2(){ Integer number = new Integer(16); Integer answer = math.doubleTheNumber(number); assertEquals((Integer)32, answer); }

@Test public void testDoubleTheNumber3(){ Integer number = null;

try{ Integer answer = math.doubleTheNumber(number); fail(); }catch(NullPointerException e){ assertEquals("You can't double null!!", e.getMessage()); }catch(Exception e){ fail(); } } }