I am trying to write a test to check the method is throwing an IllegalArgumentException. To do that I wrote a simple test code but it gives error.
Method is a constructor by the way.
public Range(double lower, double upper) {
if (lower > upper) {
String msg = "Range(double, double): require lower (" + lower
+ ") <= upper (" + upper + ").";
throw new IllegalArgumentException(msg);
}
this.lower = lower;
this.upper = upper;
}
Test code
@Test(expected = IllegalArgumentException.class)
public void testConstructor(){
new Range(5,-2);
}
What I got is
Í java.lang.IllegalArgumentException: Range(double, double): require lower (5.0) <= upper (-2.0).
as expected. But why Junit behaves like it is an error, even if I added @Test(expected = IllegalArgumentException.class) before the test?
