@Test
public void testAdd() {
double value1 = 3;
double value2 = 3;
double result = value1 + value2;
Calculator c = new Calculator();
System.out.println("-> TESTING ADD...");
Assert.assertTrue(c.add(value1, value2) == result);
}
@Test
public void testDivide() {
double value1 = 9;
double value2 = 12;
double result = value1 / value2;
Calculator c = new Calculator();
System.out.println("-> TESTING DIVIDE...");
Assert.assertTrue(c.divide(value1, value2) == result);
}
@Test
public void testMultiply() {
double value1 = 3;
double value2 = 4;
double result = value1 * value2;
Calculator c = new Calculator();
System.out.println("-> TESTING MULTIPLY..");
Assert.assertTrue(c.multiply(value1, value2) == result);
}
@Test
public void testSubtract() {
double value1 = 5;
double value2 = 10;
double result = value1 - value2;
Calculator c = new Calculator();
System.out.println("-> TESTING Subtract...");
Assert.assertTrue(c.subtract(value1, value2) == result);
}
/**
* Tests wumbo() method.
*
* @author kuczynskij
*/
@Test
public void testWumbo() {
if (Calculator.getWumbo()) {
Calculator.wumbo();
assert (Calculator.getWumbo() == false);
Calculator.wumbo();
assert (Calculator.getWumbo() == true);
} else {
Calculator.wumbo();
assert (Calculator.getWumbo() == true);
Calculator.wumbo();
assert (Calculator.getWumbo() == false);
}
}
/**
* Tests hist() method.
*
* @author chuna
*/
@SuppressWarnings("serial")
@Test
public void testHist() {
Calculator.clear();
String expectedAns = "There is no history to display.";
assert (Calculator.hist().equals(expectedAns));
List<Integer> l =
new ArrayList<Integer>() {
{
add(10);
add(5);
add(2);
}
};
Calculator.add(l);
Calculator.sub(l);
Calculator.mult(l);
try {
Calculator.div(l);
} catch (Exception e) {
assert (false);
}
expectedAns =
"1 | div | 10 5 2 | 1\n"
+ "2 | mult | 10 5 2 | 100\n"
+ "3 | sub | 10 5 2 | 3\n"
+ "4 | add | 10 5 2 | 17";
assert (Calculator.hist().equals(expectedAns));
}
public static void main(String[] args) {
int result = 0;
Calculator myCalc = new Calculator();
try {
if (args.length != 1) {
throw new IllegalArgumentException("There must be exactly one argument! e.g. add(1, 2)");
}
if (!myCalc.checkBrackets(args[0])) {
throw new IllegalArgumentException(
"Brackets of the input expression \"" + args[0] + "\" do NOT match!");
}
/* Normalize the expression by removing all the whitespaces around
* opening/closing brackets and the comma separator.
* Any remaining whitespaces after the normalization will indicate
* an invalid expression during evaluation later on.
*/
/* Remove all white spaces before and after the opening and closing brackets
*/
String expr_v1 = args[0].replaceAll("(.)(\\s+)([()])(\\s+)(.)", "$1$3$5");
/* Remove all spaces before and after the separator ,
*/
String expr_v2 = expr_v1.replaceAll("(.)(\\s*)([,])(\\s*)(.)", "$1$3$5");
String expr_v3 = expr_v2.replaceAll("(.)([,])(\\s+)(.)", "$1$2$4");
myCalc.logger.setLevel(DEBUG);
result = myCalc.evaluateExpression(expr_v3);
/* Print the result only if the expression is valid. Otherwise, an error
* message has already been logged.
*/
System.out.println(result);
} catch (Exception e) {
myCalc.logger.log(ERROR, e.toString());
return;
}
}
/**
* Tests div() method.
*
* @author kuczynskij
* @throws Exception
*/
@SuppressWarnings("serial")
@Test
public void testDiv() {
try {
List<Integer> l =
new ArrayList<Integer>() {
{
add(4);
add(2);
add(3);
}
};
assert (Calculator.div(l) == 0);
l =
new ArrayList<Integer>() {
{
add(Integer.MIN_VALUE);
add(1);
}
};
assert (Calculator.div(l) == Integer.MIN_VALUE);
l =
new ArrayList<Integer>() {
{
add(Integer.MAX_VALUE);
add(1);
}
};
assert (Calculator.div(l) == Integer.MAX_VALUE);
l =
new ArrayList<Integer>() {
{
add(4);
add(-5);
add(6);
}
};
assert (Calculator.div(l) == 0);
} catch (Exception e) {
assert (false);
}
}
/**
* Tests add() method.
*
* @author chuna
* @throws Exception
*/
@Test
public void testGetUserInput() throws Exception {
Calculator.clear();
Scanner in =
new Scanner(
"add 1 2 3\n"
+ "sub 1 2 3\n"
+ "mult 1 2 3\n"
+ "div 10 5 2\n"
+ "wumbo\n"
+ "add 1 2 3\n"
+ "sub 1 2 3\n"
+ "mult 1 !2 3\n"
+ "div 10 5 2#\n"
+ "hist\n"
+ "clear\n"
+ "help\n"
+ "lsdjfl\n"
+ "quit");
Calculator.setScanner(in);
Calculator.getUserInput();
}
/**
* Tests sub() method.
*
* @author kuczynskij
*/
@SuppressWarnings("serial")
@Test
public void testSub() {
List<Integer> l =
new ArrayList<Integer>() {
{
add(1);
add(2);
add(3);
}
};
assert (Calculator.sub(l) == -4);
l =
new ArrayList<Integer>() {
{
add(Integer.MAX_VALUE);
add(-1);
}
};
assert (Calculator.sub(l) == Integer.MAX_VALUE);
l =
new ArrayList<Integer>() {
{
add(Integer.MIN_VALUE);
add(1);
}
};
assert (Calculator.sub(l) == Integer.MIN_VALUE);
l =
new ArrayList<Integer>() {
{
add(4);
add(-5);
add(6);
}
};
assert (Calculator.sub(l) == 3);
}
/**
* Tests mult() method.
*
* @author chuna
*/
@SuppressWarnings("serial")
@Test
public void testMult() {
List<Integer> l =
new ArrayList<Integer>() {
{
add(4);
add(2);
add(3);
}
};
assert (Calculator.mult(l) == 24);
l =
new ArrayList<Integer>() {
{
add(Integer.MIN_VALUE);
add(2);
}
};
assert (Calculator.mult(l) == Integer.MIN_VALUE);
l =
new ArrayList<Integer>() {
{
add(Integer.MAX_VALUE);
add(2);
}
};
assert (Calculator.mult(l) == Integer.MAX_VALUE);
l =
new ArrayList<Integer>() {
{
add(4);
add(-5);
add(6);
}
};
assert (Calculator.mult(l) == -120);
}
/**
* Tests the div() for Exception (divide by zero).
*
* @author chuna
* @throws Exception
*/
@SuppressWarnings("serial")
@Test(expectedExceptions = Exception.class)
public void testZeroDivide() throws Exception {
List<Integer> l =
new ArrayList<Integer>() {
{
add(4);
add(0);
add(6);
}
};
Calculator.div(l);
assert (false);
}
/**
* Tests clear() method.
*
* @author kuczynskij
*/
@SuppressWarnings("serial")
@Test
public void testClear() {
List<Integer> l =
new ArrayList<Integer>() {
{
add(4);
add(2);
add(3);
}
};
Calculator.add(l);
Calculator.sub(l);
Calculator.add(l);
assert (Calculator.getHistory().size() > 0);
Calculator.clear();
assert (Calculator.getHistory().size() == 0);
}
/**
* Tests reuse() method.
*
* @author chuna
*/
@SuppressWarnings("serial")
@Test
public void testReuse() {
Calculator.clear();
List<Integer> l =
new ArrayList<Integer>() {
{
add(10);
add(5);
add(2);
}
};
Calculator.add(l);
Calculator.sub(l);
Calculator.mult(l);
try {
Calculator.div(l);
} catch (Exception e) {
assert (false);
}
assert (Calculator.reuse(4, null) == 17); // add
assert (Calculator.reuse(3, null) == 3); // sub
assert (Calculator.reuse(2, null) == 100); // mult
assert (Calculator.reuse(1, null) == 1); // div
// Now for the no spot in history found
Calculation calc = new Calculation("add");
System.out.println("History size is " + Calculator.getHistory().size());
assert (Calculator.reuse(5, calc) == 0); // add id = 0
calc = new Calculation("sub");
assert (Calculator.reuse(6, calc) == 0); // sub id = 0
calc = new Calculation("mult");
assert (Calculator.reuse(0, calc) == 1); // mult id = 1
calc = new Calculation("div");
assert (Calculator.reuse(-1, calc) == 1); // div id = 1
}
