Example tests for the simplest autobeam algo

AutoBeamSimpleTimeAlgo1.java

class AutoBeamSimpleTestAlgo1 {

	// for divisions = 840
	private static Map<Integer, Integer> durations = Map.of(
			BaseNoteModel.semiBreve, 3360,
			BaseNoteModel.minim, 1680,
			BaseNoteModel.crotchet, 840,
			BaseNoteModel.quaver, 420,
			BaseNoteModel.semiQuaver, 210,
			BaseNoteModel.demiSemiQuaver, 105,
			BaseNoteModel.hemiDemiSemiQuaver, 53
			);
	
	@Test
	void testAutoBeamSimpleTime1() {

		// establish context
		var mcx = new MusicalContext();
		var timeSig = new TimeSigModel();
		timeSig.setTop(2);
		timeSig.setBottom(4);
		mcx.setTimeSig(timeSig);
		mcx.setDivisions(840);

		// establish measure
		var measure = new MeasureModel();
		var part = new PartModel();
		var parts = new ArrayList<PartModel>();
		parts.add(part);
		measure.setParts(parts);

		// add notes
		var note1 = new DrumNoteModel();
		note1.setNoteValue(BaseNoteModel.semiQuaver);
		note1.setNoteDotted(true);
		note1.setDuration(durations.get(note1.getNoteValue()) * 15 / 10); // keeping it integer arithmetic

		part.getStaffElements().add(note1);

    // snip
    
		// run the algo
		var ab = new AutoBeamStraight();
		ab.forPart(mcx, part);

    // check it did it's job right
		assertTrue(note1.getBeams().isPresent());
		assertEquals(note1.getBeams().get().size(),2);
		assertEquals(note1.getBeams().get().get(0),BeamEnum.BEGIN);
		assertEquals(note1.getBeams().get().get(1),BeamEnum.BEGIN);
    
    // and the rest