Unstable result for a self contained class

Issues
1

These tests were produced after multiple attempts for the same class. Note: it succeeded once, but failed in later runs for two different reasons.

BTW The sandbox is turned off in the plugin. I have added a SecurityManager to checked no attempt to write occurs in the test (or any class it depends on)

The source is here.

/**
 * Method under test: {@link Maths#roundingFactor(double)}
 */
@Test
public void testRoundingFactor() {
    assertEquals(10000000000L, Maths.roundingFactor(10.0d));
    assertEquals(2L, Maths.roundingFactor(0.5d));
    assertEquals(10L, Maths.roundingFactor(-0.5d));
}

/**
 * Method under test: {@link Maths#roundingFactor(double)}
 */
@Test
@Ignore("TODO: Complete this test")
public void testRoundingFactor2() {
    // TODO: Complete this test.
    //   Reason: R013 No inputs found that don't throw a trivial exception.
    //   Diffblue Cover tried to run the arrange/act section, but the method under
    //   test threw
    //   java.lang.ArrayIndexOutOfBoundsException: 98
    //       at net.openhft.chronicle.core.Maths.roundingFactor(Maths.java:97)
    //   See https://diff.blue/R013 to resolve this issue.

    Maths.roundingFactor(98.3d);
}

/**
 * Method under test: {@link Maths#roundingFactor(int)}
 */
@Test
@Ignore("TODO: Complete this test")
public void testRoundingFactor3() {
    // TODO: Complete this test.
    //   Reason: R011 Sandboxing policy violation.
    //   Diffblue Cover ran code in your project that tried
    //     to access files created outside of the test (file 'C:\Users\PETERL~1\AppData\Local\Temp', permission 'write').
    //   Diffblue Cover's default sandboxing policy disallows this in order to prevent
    //   your code from damaging your system environment.
    //   See https://diff.blue/R011 to resolve this issue.

    // Arrange
    // TODO: Populate arranged inputs
    int digits = 0;

    // Act
    long actualRoundingFactorResult = Maths.roundingFactor(digits);

    // Assert
    // TODO: Add assertions on result
}
2

Hi @Peter_Lawrey
Thanks for getting in touch.
I’ll have a look at your example and follow up on this thread when I’ve done that.
Best regards
Peter Sear @ Diffblue

3

Hi Peter
I’ve contacted you directly as we already have other communication channels open.
For others reading this thread, I’ll post a summary once we have formed a conclusion.
Thanks
Peter Sear @ Diffblue