Question

Here’s my test:

@Test
public void randomDouble() {
    int Min = -1;
    int Max = 1;
    double r;

    for (int i = 0; i < 5; i++) {
        r = Min + (Math.random() * ((Max - Min) + 1));
        System.out.printf("%d %d: %.1f\n", Min, Max, r);
        assertTrue(Max < r && Max > r);
    }
}

It seems that the test returns after the first time the assertTrue statement within the loop is run. If I remove it, I get 5 results output. With it, I get only one.

I use this pattern in Python for fuzz testing.

Answer 1

there’s nothing to restrict asserts from being in loops.

some other points, though:

• the test will always fail (see next item for what you probably want)

• java has an assert in the language: assert Min <= r && r <= Max : "bad range"

• the “+1” in ((Max - Min) + 1) seems wrong to me