@Test
public void test_pi_multiply() {
double result = MathLib.multiply(5, MathLib.getPI());
double expected = 15.707963267948966;
assertEquals(expected, result, 0.00001);
}
@Test
public void test_pi_subtract() {
double result = MathLib.subtract(8, MathLib.getPI());
double expected = 4.858407346410207;
assertEquals(expected, result, 0.00001);
}
@Test
public void test_pi_divide() {
double result = MathLib.divide(5, MathLib.getPI());
double expected = 1.5915494309189535;
assertEquals(expected, result, 0.00001);
}
@Test
public void test_subtraction_failed() {
MathLib calc = new MathLib();
double result = calc.subtract(1, 5);
double expected = 4;
assertEquals(expected, result, 0.00001);
}
@Test
public void test_pi_add() {
double result = MathLib.add(5, MathLib.getPI());
double expected = 8.141592653589793;
assertEquals(expected, result, 0.00001);
}
@Test
public void test_pi_square() {
double result = MathLib.squareRoot(MathLib.getPI());
double expected = 1.7724538509055159;
assertEquals(expected, result, 0.00001);
}
@Test
public void testMultiply() {
double result = MathLib.multiply(5, 9);
double anotherResult = MathLib.multiply(15, 10);
double expected = 45;
double unexpected = 10;
assertEquals(expected, result, 0.00001);
assertNotEquals(unexpected, anotherResult, 0.00001);
}
@Test
public void testsquareRoot() {
double result = MathLib.squareRoot(25);
double expected = 5;
assertEquals(expected, result, .00001);
}
@Test
public void test_pi_failed() {
double result = MathLib.getPI();
double expected = 3.14;
assertEquals(expected, result, 0.00001);
}
@Test
public void testExpressions() {
// Order of operations is disregarded for now
double result1 = MathLib.evaluateExpression("4 + 3");
double result2 = MathLib.evaluateExpression("4 + 3 - 2");
double result3 = MathLib.evaluateExpression("4 -3+ 2*5");
double result4 = MathLib.evaluateExpression("1.1 + 2.2 + 3.3 - 4.4");
double result5 = MathLib.evaluateExpression("-3 * 2");
double result6 = MathLib.evaluateExpression("2 * -2 + 10");
assertEquals(7, result1, 0.00001);
assertEquals(5, result2, 0.00001);
assertEquals(15, result3, 0.00001);
assertEquals(2.2, result4, 0.00001);
assertEquals(-6, result5, 0.00001);
assertEquals(6, result6, 0.00001);
}
@Test
public void testAddition() {
double result = MathLib.add(18, 24);
double expected = 42;
assertEquals(expected, result, .00001);
}
@Test
public void testSquareRootFail() {
double result = MathLib.squareRoot(9);
double expected = 6;
assertEquals(expected, result, .00001);
}
@Test
public void testDivisionFail() {
double result = MathLib.divide(20, 2);
double expected = 5;
assertEquals(expected, result, .00001);
}
@Test
public void testAdditionFail() {
double result = MathLib.add(10, 10);
double expected = 5;
assertEquals(expected, result, .00001);
}