@Test
public void testEnsureNotNegative_ValidCase() {
IllegalStateException unexpected = null;
try {
DBQueries.ensureNotNegative(0);
DBQueries.ensureNotNegative(1);
} catch (IllegalStateException e) {
unexpected = e;
}
assertNull(unexpected);
}
@Test
public void testEnsureNotNegative_InvalidCase() {
IllegalStateException expected = null;
try {
DBQueries.ensureNotNegative(-1);
} catch (IllegalStateException e) {
expected = e;
}
assertNotNull(expected);
assertEquals("Update returned error code: -1", expected.getMessage());
}