@Test
public void testToString() {
MyDouble a = new MyDouble(1);
MyDouble b = new MyDouble(2);
MyDouble c = new MyDouble(3);
QuadraticEquation StringQuad = new QuadraticEquation(a, b, c);
assertEquals("1x^2+2x+3", StringQuad.toString());
}
@Test
public void testSingleValConstructor() {
MyDouble cVal = new MyDouble(27.8);
QuadraticEquation testQuad = new QuadraticEquation(cVal);
assertTrue(
testQuad.getA().isZero() && testQuad.getB().isZero() && testQuad.getC().equals(cVal));
}
@Test
public void testSubtract() {
MyDouble a = new MyDouble(1);
MyDouble b = new MyDouble(2);
MyDouble c = new MyDouble(3);
QuadraticEquation EquatOne = new QuadraticEquation(a, b, c);
QuadraticEquation EquatTwo = new QuadraticEquation(a, b, c);
QuadraticEquation TestQuad = new QuadraticEquation(a.subtract(a), b.subtract(b), c.subtract(c));
assertTrue(TestQuad.equals(EquatOne.subtract(EquatTwo)));
}
@Test
public void testAdd() {
MyDouble a = new MyDouble(1);
MyDouble b = new MyDouble(2);
MyDouble c = new MyDouble(3);
QuadraticEquation EquatOne = new QuadraticEquation(a, b, c);
QuadraticEquation EquatTwo = new QuadraticEquation(a, b, c);
QuadraticEquation TestQuad = new QuadraticEquation(a.add(a), b.add(b), c.add(c));
assertTrue(TestQuad.equals(EquatOne.add(EquatTwo)));
}
// YOU NEED TO IMPLEMENT AT LEAST THESE JUNIT TESTS BELOW
@Test
public void testGetters() {
MyDouble a = new MyDouble(3);
MyDouble b = new MyDouble(4);
MyDouble c = new MyDouble(5);
QuadraticEquation testQuad = new QuadraticEquation(a, b, c);
assertTrue(a.equals(testQuad.getA()));
assertTrue(b.equals(testQuad.getB()));
assertTrue(c.equals(testQuad.getC()));
}
@Test
public void testNormalize() {
MyDouble a = new MyDouble(1);
MyDouble b = new MyDouble(2);
MyDouble c = new MyDouble(3);
QuadraticEquation NormQuad = new QuadraticEquation(a, b, c);
MyDouble norm = new MyDouble(a.square().add(b.square().add(c.square())));
MyDouble normTest = new MyDouble(norm.sqrt());
assertTrue(normTest.equals(NormQuad.normalize()));
}
@Test
public void testDerivative() {
MyDouble a = new MyDouble(1);
MyDouble b = new MyDouble(2);
MyDouble c = new MyDouble(3);
QuadraticEquation DiffQuad = new QuadraticEquation(a, b, c);
MyDouble expOne = new MyDouble(2);
MyDouble expTwo = new MyDouble(1);
QuadraticEquation ResultQuad = new QuadraticEquation(a.multiply(expOne), b.multiply(expTwo));
assertTrue(ResultQuad.equals(DiffQuad.derivative()));
}
@Test
public void testEvaluate() {
MyDouble aVal = new MyDouble(2);
MyDouble bVal = new MyDouble(4);
MyDouble cVal = new MyDouble(8);
QuadraticEquation testQuad = new QuadraticEquation(aVal, bVal, cVal);
assertTrue(testQuad.evaluate(MyDouble.zero).equals(new MyDouble(8)));
assertTrue(testQuad.evaluate(new MyDouble(1)).equals(new MyDouble(14)));
assertTrue(testQuad.evaluate(new MyDouble(2)).equals(new MyDouble(24)));
assertTrue(testQuad.evaluate(new MyDouble(3)).equals(new MyDouble(38)));
}
@Test
public void testThreeValConstructor() {
MyDouble aVal = new MyDouble(15.7);
MyDouble bVal = new MyDouble(-23.7);
MyDouble cVal = new MyDouble(4.3);
QuadraticEquation testQuad = new QuadraticEquation(aVal, bVal, cVal);
assertTrue(
testQuad.getA().equals(aVal)
&& testQuad.getB().equals(bVal)
&& testQuad.getC().equals(cVal));
}
@Test
public void testEqualsAndCompareTo() {
MyDouble a = new MyDouble(1);
MyDouble b = new MyDouble(2);
MyDouble c = new MyDouble(3);
QuadraticEquation TestQuadOne = new QuadraticEquation(a, b, c);
QuadraticEquation TestQuadTwo = new QuadraticEquation(a, b, c);
QuadraticEquation TestQuadThree = new QuadraticEquation(c, c, c);
assertEquals(0, TestQuadOne.compareTo(TestQuadTwo));
assertEquals(-1, TestQuadOne.compareTo(TestQuadThree));
assertEquals(true, TestQuadOne.equals(TestQuadTwo));
}
@Test
public void testMultiply() {
MyDouble a = new MyDouble(1);
MyDouble b = new MyDouble(2);
MyDouble c = new MyDouble(3);
QuadraticEquation TestOneQuad = new QuadraticEquation(a, b, c);
QuadraticEquation TestTwoQuad = new QuadraticEquation(a, b, c);
QuadraticEquation MultiQuadNull = TestOneQuad.limitedMultiply(TestTwoQuad);
assertEquals(null, MultiQuadNull);
QuadraticEquation TestThreeQuad = new QuadraticEquation(c);
QuadraticEquation MultiQuad = TestOneQuad.limitedMultiply(TestThreeQuad);
QuadraticEquation MultiTest =
new QuadraticEquation(a.multiply(c), b.multiply(c), c.multiply(c));
assertTrue(MultiQuad.equals(MultiTest));
}
@Test
public void TestParse() {
String Quadratic = "x^2+2x+3";
MyDouble a = new MyDouble(1);
MyDouble b = new MyDouble(2);
MyDouble c = new MyDouble(3);
QuadraticEquation TestQuad = new QuadraticEquation(a, b, c);
assertTrue((QuadraticEquation.parseQuadratic(Quadratic)).equals(TestQuad));
}
public static void main(String[] args) {
QuadraticEquation equation = new QuadraticEquation(1, -1, -2);
// Prints out the input equation.
System.out.println("Input equation: " + equation.getStringForm());
// Check for real solutions.
if (equation.hasRealRoots()) {
// Solution 1
System.out.println("Solution 1: " + equation.calcSolution1());
System.out.println("Expected: -1.0");
// Solution 2
System.out.println("Solution 2: " + equation.calcSolution2());
System.out.println("Expected: 2.0");
} else { // No real solutions
System.out.println(
"The equation given, " + equation.getStringForm() + ", has no real solutions.");
}
}
@Test
public void testDefaultConstructor() {
QuadraticEquation testQuad = new QuadraticEquation();
assertTrue(testQuad.getA().isZero() && testQuad.getB().isZero() && testQuad.getC().isZero());
}