method.increment(CounterImpl.COUNTER_1_0, CounterImpl.COUNTER_0_0, 3);
addClass(123L, "Sample", null, method);
// Add class with same id:
method = new MethodCoverageImpl("doit", "()V", null);
method.increment(CounterImpl.COUNTER_1_0, CounterImpl.COUNTER_0_0, 3);
addClass(123L, "Sample", null, method);
// Second add must be ignored:
final Collection<IClassCoverage> classes = coverageBuilder.getClasses();
assertEquals(1, classes.size());