ProjectDataDifferenceCalculator dcalc = new ProjectDataDifferenceCalculator(
two, pOne.getData());
assertEquals(7, two.getNumberOfCoveredLines());
assertEquals(1, dcalc.getDifference().getNumberOfCoveredLines());
ProjectData three = new ProjectData();
three.merge(two);
addSomeStuff(three, "foo", 4);
addSomeStuff(three, "blap", 5);
assertEquals(three.getNumberOfCoveredLines(), 13);
PackageAndProjectData pThree = new PackageAndProjectData(three,
"com.one");