func TestPatternAddTo(t *testing.T) {
// setup pattern
pat := NewPattern(1)
err := pat.AddTo(0, lightning.NewNote("audio/file.flac", 72, 96))
if err != nil {
t.Fatal(err)
}
err = pat.AddTo(0, lightning.NewNote("audio/file.flac", 76, 50))
if err != nil {
t.Fatal(err)
}
// try to add a note at a pos greater than pattern size - 1
err = pat.AddTo(uint64(pat.Length+1), lightning.NewNote("file.wav", 59, 114))
if err == nil {
t.Fatalf("expected err when adding note but got nil")
}
assert.Equal(t, err.Error(), "pos (2) greater than pattern length (1)")
firstNotes := pat.NotesAt(0)
assert.Equal(t, len(firstNotes), 2)
assert.Equal(t, firstNotes[0].Number, int32(72))
assert.Equal(t, firstNotes[0].Velocity, int32(96))
assert.Equal(t, firstNotes[1].Number, int32(76))
assert.Equal(t, firstNotes[1].Velocity, int32(50))
}
func TestPatternNotesAt(t *testing.T) {
pat := NewPattern(4)
err := pat.AddTo(0, lightning.NewNote("audio/file.flac", 60, 120))
assert.Equal(t, err, nil)
err = pat.AddTo(0, lightning.NewNote("audio/file.flac", 62, 120))
assert.Equal(t, err, nil)
err = pat.AddTo(0, lightning.NewNote("audio/file.flac", 64, 120))
assert.Equal(t, err, nil)
notes := pat.NotesAt(0)
assert.Equal(t, len(notes), 3)
}
func TestPatternEncodeJson(t *testing.T) {
pat := NewPattern(1)
pat.AddTo(0, lightning.NewNote("audio/file.flac", 56, 101))
expected := []byte(`{"length":1,"notes":[[{"sample":"audio/file.flac","number":56,"velocity":101}]]}`)
bs, err := json.Marshal(pat)
assert.Equal(t, err, nil)
assert.Equal(t, bs, expected)
}
func TestPatternDecodeJson(t *testing.T) {
expected := NewPattern(2)
expected.AddTo(0, lightning.NewNote("audio/file1.flac", 55, 84))
expected.AddTo(1, lightning.NewNote("audio/file2.flac", 54, 76))
bs := []byte(`{"length":2,"notes":[[{"sample":"audio/file1.flac","number":55,"velocity":84}],[{"sample":"audio/file2.flac","number":54,"velocity":76}]]}`)
pat := new(Pattern)
err := json.Unmarshal(bs, &pat)
if err != nil {
t.Fatal(err)
}
// verify first notes
firstNotes := pat.NotesAt(0)
if len(firstNotes) != 1 {
t.Fatalf("wrong number of notes (%d)", len(firstNotes))
}
fn := firstNotes[0]
if fn.Sample != "audio/file1.flac" {
t.Fatalf("wrong sample (%s)", fn.Sample)
}
if fn.Number != 55 {
t.Fatalf("wrong note number (%d)", fn.Number)
}
if fn.Velocity != 84 {
t.Fatalf("wrong note velocity (%d)", fn.Velocity)
}
// verify second notes
secondNotes := pat.NotesAt(1)
if len(secondNotes) != 1 {
t.Fatalf("wrong number of notes (%d)", len(secondNotes))
}
sn := secondNotes[0]
if sn.Sample != "audio/file2.flac" {
t.Fatalf("wrong sample (%s)", sn.Sample)
}
if sn.Number != 54 {
t.Fatalf("wrong note number (%d)", sn.Number)
}
if sn.Velocity != 76 {
t.Fatalf("wrong note velocity (%d)", sn.Velocity)
}
}
func TestPatternClear(t *testing.T) {
// setup a pattern
pat := NewPattern(2)
err := pat.AddTo(0, lightning.NewNote("foo.ogg", 93, 72))
if err != nil {
t.Fatal(err)
}
err = pat.AddTo(0, lightning.NewNote("foo.ogg", 90, 83))
if err != nil {
t.Fatal(err)
}
// verify the notes we just added
firstNotes := pat.NotesAt(0)
assert.Equal(t, 2, len(firstNotes))
assert.Equal(t, firstNotes[0].Sample, "foo.ogg")
if num := firstNotes[0].Number; num != 93 {
t.Fatalf("expected note number 93, but got %d", num)
}
if num := firstNotes[0].Velocity; num != 72 {
t.Fatalf("expected note velocity 72, but got %d", num)
}
assert.Equal(t, firstNotes[0].Sample, "foo.ogg")
if num := firstNotes[1].Number; num != 90 {
t.Fatalf("expected note number 90, but got %d", num)
}
if num := firstNotes[1].Velocity; num != 83 {
t.Fatalf("expected note velocity 83, but got %d", num)
}
// clear them
err = pat.Clear(0)
if err != nil {
t.Fatal(err)
}
noNotes := pat.NotesAt(0)
assert.Equal(t, len(noNotes), 0)
}
func TestPatternRemoveFrom(t *testing.T) {
// setup pattern
pat := NewPattern(1)
err := pat.AddTo(0, lightning.NewNote("audio/file.flac", 72, 96))
if err != nil {
t.Fatal(err)
}
err = pat.AddTo(0, lightning.NewNote("audio/file.flac", 58, 108))
if err != nil {
t.Fatal(err)
}
err = pat.RemoveFrom(0, lightning.NewNote("audio/file.flac", 72, 0))
if err != nil {
t.Fatal(err)
}
// look at the notes at pos 0
firstNotes := pat.NotesAt(0)
assert.Equal(t, len(firstNotes), 2)
if firstNotes[0] != nil {
t.Fatalf("failed to remove note")
}
assert.Equal(t, firstNotes[1].Number, int32(58))
assert.Equal(t, firstNotes[1].Velocity, int32(108))
}