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Posted to dev@commons.apache.org by bu...@apache.org on 2005/10/14 17:45:44 UTC
DO NOT REPLY [Bug 37095] New: -
[math] Failure to fail when testing for exceptions in MathUtils
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http://issues.apache.org/bugzilla/show_bug.cgi?id=37095
Summary: [math] Failure to fail when testing for exceptions in
MathUtils
Product: Commons
Version: 1.1.0
Platform: Other
OS/Version: other
Status: NEW
Severity: normal
Priority: P2
Component: Math
AssignedTo: commons-dev@jakarta.apache.org
ReportedBy: elharo@metalab.unc.edu
In MathUtilsTest I found the following code:
public void testAddAndCheck() {
int big = Integer.MAX_VALUE;
int bigNeg = Integer.MIN_VALUE;
assertEquals(big, MathUtils.addAndCheck(big, 0));
try {
int res = MathUtils.addAndCheck(big, 1);
} catch (ArithmeticException ex) {}
try {
int res = MathUtils.addAndCheck(bigNeg, -1);
} catch (ArithmeticException ex) {}
}
public void testMulAndCheck() {
int big = Integer.MAX_VALUE;
int bigNeg = Integer.MIN_VALUE;
assertEquals(big, MathUtils.mulAndCheck(big, 1));
try {
int res = MathUtils.mulAndCheck(big, 2);
} catch (ArithmeticException ex) {}
try {
int res = MathUtils.mulAndCheck(bigNeg, 2);
} catch (ArithmeticException ex) {}
}
public void testSubAndCheck() {
int big = Integer.MAX_VALUE;
int bigNeg = Integer.MIN_VALUE;
assertEquals(big, MathUtils.subAndCheck(big, 0));
try {
int res = MathUtils.subAndCheck(big, -1);
} catch (ArithmeticException ex) {}
try {
int res = MathUtils.subAndCheck(bigNeg, 1);
} catch (ArithmeticException ex) {}
}
These tests pass even if the expected excepiton is thrown. All three should be
reworked with fail() statements at the end of the try block like so:
try {
int res = MathUtils.subAndCheck(big, -1);
fail("Didn't throw exceptions when subtracting one over the maximum");
} catch (ArithmeticException ex) {}
try {
int res = MathUtils.subAndCheck(bigNeg, 1);
fail("Didn't throw exceptions when subtracting one over the maximum");
} catch (ArithmeticException ex) {}
I doubt there's a real bug here, but if there is, these tests won't find it.
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