public void GetNoteMotionFromNotes(int previousNote, int currentNote, NoteMotion expectedNoteMotion)
{
var context = _factory.CreateCompositionContext();
var noteMotion = context.GetNoteMotionFromNotes(previousNote, currentNote);
Assert.AreEqual(expectedNoteMotion, noteMotion);
}
/// <summary>
/// Determines whether the given NoteMotionSpan and NoteMotion values create a correct leap return.
/// </summary>
/// <param name="currentNoteMotionSpan">The current NoteMotionSpan</param>
/// <param name="nextNoteMotionSpan">The next NoteMotionSpan</param>
/// <param name="currentNoteMotion">The current NoteMotion</param>
/// <param name="nexNoteMotion">The next NoteMotion</param>
/// <returns>the given NoteMotionSpan and NoteMotion values create a correct leap return</returns>
private static bool IsCorrectLeapReturn(
NoteMotionSpan currentNoteMotionSpan,
NoteMotionSpan nextNoteMotionSpan,
NoteMotion currentNoteMotion,
NoteMotion nexNoteMotion
)
{
return(currentNoteMotionSpan == NoteMotionSpan.Leap &&
nextNoteMotionSpan == NoteMotionSpan.Step &&
currentNoteMotion != nexNoteMotion);
}
/// <summary>
/// NoteChoice constructor.
/// </summary>
/// <param name="counterPointNoteMotion">The counterpoint note motion</param>
/// <param name="cantusFirmusNoteMotion">The cantus firmus note motion</param>
/// <param name="counterPointScaleDegreeChange">The number of scale degrees the counterpoint should change</param>
/// <param name="cantusFirmusScaleDegreeChange">The number of scale degrees the cantus firmus should change</param>
public NoteChoice(
NoteMotion counterPointNoteMotion = NoteMotion.Oblique,
NoteMotion cantusFirmusNoteMotion = NoteMotion.Oblique,
int counterPointScaleDegreeChange = 0,
int cantusFirmusScaleDegreeChange = 0
)
{
CantusFirmusNoteMotion = cantusFirmusNoteMotion;
CounterPointNoteMotion = counterPointNoteMotion;
CantusFirmusScaleDegreeChange = cantusFirmusScaleDegreeChange;
CounterPointScaleDegreeChange = counterPointScaleDegreeChange;
}
/// <summary>
/// Determines whether the NoteMotion and NoteMotionSpan values create multiple leaps in the same direction.
/// </summary>
/// <param name="currentNoteArrivedFromNoteMotion">The current arrived from NoteMotion</param>
/// <param name="nextNoteArrivedFromNoteMotion">The next arrived from NoteMotion</param>
/// <param name="currentNoteArrivedFromNoteMotionSpan">The current arrived from NoteMotionSpan</param>
/// <param name="nextNoteArrivedFromNoteMotionSpan">The next arrived from NoteMotionSpan</param>
/// <returns></returns>
private static bool IsMultipleLeap(
NoteMotion currentNoteArrivedFromNoteMotion,
NoteMotion nextNoteArrivedFromNoteMotion,
NoteMotionSpan currentNoteArrivedFromNoteMotionSpan,
NoteMotionSpan nextNoteArrivedFromNoteMotionSpan
)
{
if (currentNoteArrivedFromNoteMotionSpan != NoteMotionSpan.Leap)
{
return(false);
}
return(currentNoteArrivedFromNoteMotionSpan == nextNoteArrivedFromNoteMotionSpan &&
currentNoteArrivedFromNoteMotion == nextNoteArrivedFromNoteMotion);
}
/// <summary>
/// CompositionContext constructor: initialize class properties with explicit values.
/// </summary>
/// <param name="counterPointNoteMotion">The counterpoint note motion</param>
/// <param name="counterPointNoteMotionSpan">The counterpoint note motion span</param>
/// <param name="counterPointNoteScaleDegree">The counterpoint note scale degree</param>
/// <param name="cantusFirmusNoteMotion">The cantus firmus note motion</param>
/// <param name="cantusFirmusNoteMotionSpan">The cantus firmus note motion span</param>
/// <param name="cantusFirmusNoteScaleDegree">The cantus firmus scale degree</param>
public CompositionContext(
NoteMotion counterPointNoteMotion,
NoteMotionSpan counterPointNoteMotionSpan,
ScaleDegree counterPointNoteScaleDegree,
NoteMotion cantusFirmusNoteMotion,
NoteMotionSpan cantusFirmusNoteMotionSpan,
ScaleDegree cantusFirmusNoteScaleDegree
)
{
CounterPointNoteMotion = counterPointNoteMotion;
CounterPointNoteMotionSpan = counterPointNoteMotionSpan;
CounterPointNoteScaleDegree = counterPointNoteScaleDegree;
CantusFirmusNoteMotion = cantusFirmusNoteMotion;
CantusFirmusNoteMotionSpan = cantusFirmusNoteMotionSpan;
CantusFirmusNoteScaleDegree = cantusFirmusNoteScaleDegree;
}
/// <summary>
/// Override for creating a CompositionContext with specified values.
/// </summary>
/// <param name="counterPointNoteMotion">The counterpoint NoteMotion to use</param>
/// <param name="counterPointNoteMotionSpan">The counterpoint NoteMotionSpan to use</param>
/// <param name="counterPointNoteScaleDegree">The counterpoint ScaleDegree to use</param>
/// <param name="cantusFirmusNoteMotion">The cantus firmus NoteMotion to use</param>
/// <param name="cantusFirmusNoteMotionSpan">The cantus firmus NoteMotionSpan to use</param>
/// <param name="cantusFirmusNoteScaleDegree">The cantus firmus ScaleDegree to use</param>
/// <returns></returns>
public CompositionContext CreateCompositionContext(
NoteMotion counterPointNoteMotion,
NoteMotionSpan counterPointNoteMotionSpan,
ScaleDegree counterPointNoteScaleDegree,
NoteMotion cantusFirmusNoteMotion,
NoteMotionSpan cantusFirmusNoteMotionSpan,
ScaleDegree cantusFirmusNoteScaleDegree
)
{
return(new CompositionContext(
counterPointNoteMotion,
counterPointNoteMotionSpan,
counterPointNoteScaleDegree,
cantusFirmusNoteMotion,
cantusFirmusNoteMotionSpan,
cantusFirmusNoteScaleDegree
));
}
/// <summary>
/// Determines whether or not the given notes correctly resolve according to the ascending seventh rule.
/// </summary>
/// <param name="currentNote">The current note</param>
/// <param name="nextNote">The next note</param>
/// <param name="currentNoteArrivedFromNoteMotion">The note motion which the current note arrived from</param>
/// <returns>Whether the given notes correctly resolve</returns>
private bool IncorrectlyResolves(int currentNote, int nextNote, NoteMotion currentNoteArrivedFromNoteMotion)
{
return(_scaleDegreeEvaluator.GetScaleDegreeFromNote(currentNote) == ScaleDegree.Seventh &&
currentNoteArrivedFromNoteMotion == NoteMotion.Ascending &&
_scaleDegreeEvaluator.GetScaleDegreeFromNote(nextNote) != ScaleDegree.Root);
}
