melrōse musical expression player

package io import ( "bufio" "bytes" "errors" "testing" ) func TestReadMessage_NoteOn(t *testing.T) { data := []byte{noteon, 65, 127} r := bufio.NewReader(bytes.NewReader(data)) m, err := ReadMessage(r) if err != nil { t.Fatal(err) } if m.command != noteon { t.Errorf("got %v want %v", m.command, noteon) } if m.channel != 0 { t.Errorf("got %v want %v", m.channel, 0) } if m.parameter1 != 65 { t.Errorf("got %v want %v", m.parameter1, 65) } if m.parameter2 != 127 { t.Errorf("got %v want %v", m.parameter2, 127) } } func TestReadMessage_NoteOff(t *testing.T) { data := []byte{noteoff, 23, 3} r := bufio.NewReader(bytes.NewReader(data)) m, err := ReadMessage(r) if err != nil { t.Fatal(err) } if m.command != noteoff { t.Errorf("got %v want %v", m.command, noteoff) } if m.channel != 0 { t.Errorf("got %v want %v", m.channel, 0) } if m.parameter1 != 23 { t.Errorf("got %v want %v", m.parameter1, 23) } if m.parameter2 != 3 { t.Errorf("got %v want %v", m.parameter2, 3) } } func TestReadMessage_ControlChange(t *testing.T) { data := []byte{controlchange, 2, 3} r := bufio.NewReader(bytes.NewReader(data)) m, err := ReadMessage(r) if err != nil { t.Fatal(err) } if m.command != controlchange { t.Errorf("got %v want %v", m.command, controlchange) } if m.parameter1 != 2 { t.Errorf("got %v want %v", m.parameter1, 2) } if m.parameter2 != 3 { t.Errorf("got %v want %v", m.parameter2, 3) } } func TestReadMessage_UnknownCommand(t *testing.T) { data := []byte{0b11001100, 1, 2, 3, 127, noteon, 1, 1} r := bufio.NewReader(bytes.NewReader(data)) m, err := ReadMessage(r) if err != nil { t.Fatal(err) } if m.command != noteon { t.Errorf("got %v want %v", m.command, noteon) } } func TestReadMessage_ReadByteError(t *testing.T) { r := bufio.NewReader(&errReader{errors.New("read error")}) _, err := ReadMessage(r) if err == nil { t.Fatal("expected an error") } } func TestReadMessage_NoteOnReadByteError1(t *testing.T) { data := []byte{noteon} r := bufio.NewReader(bytes.NewReader(data)) _, err := ReadMessage(r) if err == nil { t.Fatal("expected an error") } } func TestReadMessage_NoteOnReadByteError2(t *testing.T) { data := []byte{noteon, 1} r := bufio.NewReader(bytes.NewReader(data)) _, err := ReadMessage(r) if err == nil { t.Fatal("expected an error") } } func TestReadMessage_NoteOffReadByteError1(t *testing.T) { data := []byte{noteoff} r := bufio.NewReader(bytes.NewReader(data)) _, err := ReadMessage(r) if err == nil { t.Fatal("expected an error") } } func TestReadMessage_NoteOffReadByteError2(t *testing.T) { data := []byte{noteoff, 1} r := bufio.NewReader(bytes.NewReader(data)) _, err := ReadMessage(r) if err == nil { t.Fatal("expected an error") } } func TestReadMessage_ControlChangeReadByteError1(t *testing.T) { data := []byte{controlchange} r := bufio.NewReader(bytes.NewReader(data)) _, err := ReadMessage(r) if err == nil { t.Fatal("expected an error") } } func TestReadMessage_ControlChangeReadByteError2(t *testing.T) { data := []byte{controlchange, 1} r := bufio.NewReader(bytes.NewReader(data)) _, err := ReadMessage(r) if err == nil { t.Fatal("expected an error") } } func TestReadMessage_UnknownCommandReadByteError(t *testing.T) { data := []byte{0b11001100, 1} r := bufio.NewReader(bytes.NewReader(data)) _, err := ReadMessage(r) if err == nil { t.Fatal("expected an error") } } func TestWriteMessage(t *testing.T) { buf := new(bytes.Buffer) err := WriteMessage(1, 2, 3, buf) if err != nil { t.Fatal(err) } if got, want := buf.String(), "\x01\x02\x03"; got != want { t.Errorf("got [%s] want [%s]", got, want) } } func TestWriteMessage_Error(t *testing.T) { w := &errWriter{errors.New("write error")} err := WriteMessage(1, 2, 3, w) if err == nil { t.Fatal("expected an error") } } // errReader is a helper struct for testing io error cases. type errReader struct { err error } func (r *errReader) Read(p []byte) (n int, err error) { return 0, r.err } // errWriter is a helper struct for testing io error cases. type errWriter struct { err error } func (w *errWriter) Write(p []byte) (n int, err error) { return 0, w.err }