@Test
	public void testFunctionsSame() throws Exception {
		programDiff = new ProgramDiff(p1, p2, new AddressSet(addr(0x1002239), addr(0x100248c)));
		programDiff.setFilter(new ProgramDiffFilter(ProgramDiffFilter.FUNCTION_DIFFS));
		assertEquals(new AddressSet(), programDiff.getDifferences(programDiff.getFilter(), null));
	}
Test that ProgramDiff doesn't indicate a difference when the functions
are the same in Program1 and Program2.
Ghidra/Features/Base/src/test.slow/java/ghidra/program/util/ProgramDiff1Test.java