expected to be thrown but nothing was thrown

Question

I make a junit test for a programm and the error is that it was expection an thrown error but nothing was thrown. What could be the problem?

public static double calcArea(double a, double b, double c) {
checkTriangle(a, b, c);
double s = (a + b + c)/2;
return Math.sqrt(s * (s - a) * (s - b) * (s - c));
}

private static void checkTriangle(double a, double b, double c) {
// checkIfNumbersArePositive(a, b, c);

//checkIfNumbersAreTooBig(a,b,c);

checkRatio(a, b, c);

}

private static void checkRatio(double a, double b, double c) {
try {
if (a + b <= c) {
throw new NotATriangleException("Wont form a Triangle");
}
}
catch(Exception e){
e.toString();

}

}

Answer 1

Maybe a+b is not <= c?
Paste your whole code in a playground and link it here
Btw what is "NotATriangleException"?
I guess it's your own type, so maybe you catch wrong type?

Answer 2

thats the code
https://code.sololearn.com/c4a251a177a2

Answer 3

yes NotATriangleException is my own type