/
mocks.go
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/
mocks.go
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// Copyright 2012 Joe Wass. All rights reserved.
// Use of this source code is governed by the MIT license
// which can be found in the LICENSE file.
// MIDI package
// A package for reading Standard Midi Files, written in Go.
// Joe Wass 2012
// joe@afandian.com
/*
* Mocks implementations for testing.
* In order to check that the right calls are made to the LexerCallback by the Lexer, a mock callback is pssed to it during tests.
*/
package midi
import (
"io"
)
// A mock implementation of LexerCallback that does nothing.
type MockLexerCallback struct{}
func (*MockLexerCallback) Header(header HeaderData) {}
func (*MockLexerCallback) Track(header ChunkHeader) {}
func (*MockLexerCallback) Began() {}
func (*MockLexerCallback) Finished() {}
func (*MockLexerCallback) ErrorReading() {}
func (*MockLexerCallback) ErrorOpeningFile() {}
func (*MockLexerCallback) NoteOff(channel uint8, pitch uint8, velocity uint8, time uint32) {}
func (*MockLexerCallback) NoteOn(channel uint8, pitch uint8, velocity uint8, time uint32) {}
func (*MockLexerCallback) PolyphonicAfterTouch(channel uint8, pitch uint8, pressure uint8, time uint32) {
}
func (*MockLexerCallback) ControlChange(channel uint8, controller uint8, value uint8, time uint32) {}
func (*MockLexerCallback) ProgramChange(channel uint8, program uint8, time uint32) {}
func (*MockLexerCallback) ChannelAfterTouch(channel uint8, value uint8, time uint32) {}
func (*MockLexerCallback) PitchWheel(channel uint8, value int16, absValue uint16, time uint32) {}
func (*MockLexerCallback) TimeCodeQuarter(messageType uint8, values uint8, time uint32) {}
func (*MockLexerCallback) Tempo(bpm uint32, microsecondsPerCrotchet uint32, time uint32) {}
func (*MockLexerCallback) SongPositionPointer(beats uint16, time uint32) {}
func (*MockLexerCallback) SongSelect(song uint8, time uint32) {}
func (*MockLexerCallback) Undefined1(time uint32) {}
func (*MockLexerCallback) Undefined2(time uint32) {}
func (*MockLexerCallback) TuneRequest(time uint32) {}
func (*MockLexerCallback) TimingClock(time uint32) {}
func (*MockLexerCallback) Undefined3(time uint32) {}
func (*MockLexerCallback) Start(time uint32) {}
func (*MockLexerCallback) Continue(time uint32) {}
func (*MockLexerCallback) Stop(time uint32) {}
func (*MockLexerCallback) Undefined4(time uint32) {}
func (*MockLexerCallback) ActiveSensing(time uint32) {}
func (*MockLexerCallback) Reset(time uint32) {}
func (*MockLexerCallback) Done(time uint32) {}
func (*MockLexerCallback) SequenceNumber(channel uint8, number uint16, numberGiven bool, time uint32) {
}
func (*MockLexerCallback) Text(channel uint8, text string, time uint32) {}
func (*MockLexerCallback) CopyrightText(channel uint8, text string, time uint32) {}
func (*MockLexerCallback) SequenceName(channel uint8, text string, time uint32) {}
func (*MockLexerCallback) TrackInstrumentName(channel uint8, text string, time uint32) {}
func (*MockLexerCallback) LyricText(channel uint8, text string, time uint32) {}
func (*MockLexerCallback) MarkerText(channel uint8, text string, time uint32) {}
func (*MockLexerCallback) CuePointText(channel uint8, text string, time uint32) {}
func (*MockLexerCallback) EndOfTrack(channel uint8, time uint32) {}
func (*MockLexerCallback) TimeSignature(numerator uint8, denomenator uint8, clocksPerClick uint8, demiSemiQuaverPerQuarter uint8, time uint32) {
}
func (*MockLexerCallback) KeySignature(key ScaleDegree, mode KeySignatureMode, sharpsOrFlats int8) {
}
// A mock implementation of LexerCallback that counts each method call and stores the most recent values,
// so that calls can be verified.
type CountingLexerCallback struct {
// Callback counts
header int
track int
began int
finished int
errorReading int
errorOpeningFile int
noteOff int
noteOn int
polyphonicAfterTouch int
controlChange int
programChange int
channelAfterTouch int
pitchWheel int
timeCodeQuarter int
songPositionPointer int
songSelect int
undefined1 int
undefined2 int
tuneRequest int
timingClock int
undefined3 int
start int
continue_ int
stop int
undefined4 int
activeSensing int
reset int
done int
endOfTrack int
text int
copyrightText int
sequenceName int
trackInstrumentName int
lyricText int
markerText int
cuePointText int
sequenceNumber int
tempo int
// Most recent values
headerData HeaderData
chunkHeader ChunkHeader
pitch uint8
channel uint8
time uint32
velocity uint8
pressure uint8
textValue string
pitchWheelValue int16
pitchWheelValueAbsolute uint16
sequenceNumberGiven bool
sequenceNumberValue uint16
// Time sig args
numerator uint8
denomenator uint8
clocksPerClick uint8
demiSemiQuaverPerQuarter uint8
// Tempo
microsecondsPerCrotchet uint32
bpm uint32
}
func (cbk *CountingLexerCallback) Header(header HeaderData) { cbk.header++; cbk.headerData = header }
func (cbk *CountingLexerCallback) Track(header ChunkHeader) { cbk.track++; cbk.chunkHeader = header }
func (cbk *CountingLexerCallback) Began() { cbk.began++ }
func (cbk *CountingLexerCallback) Finished() { cbk.finished++ }
func (cbk *CountingLexerCallback) ErrorReading() { cbk.errorReading++ }
func (cbk *CountingLexerCallback) ErrorOpeningFile() { cbk.errorOpeningFile++ }
func (cbk *CountingLexerCallback) NoteOff(channel uint8, pitch uint8, velocity uint8, time uint32) {
cbk.noteOff++
cbk.pitch = pitch
cbk.channel = channel
cbk.velocity = velocity
cbk.time = time
}
func (cbk *CountingLexerCallback) NoteOn(channel uint8, pitch uint8, velocity uint8, time uint32) {
cbk.noteOn++
cbk.pitch = pitch
cbk.channel = channel
cbk.velocity = velocity
cbk.time = time
}
func (cbk *CountingLexerCallback) PolyphonicAfterTouch(channel uint8, pitch uint8, pressure uint8, time uint32) {
cbk.polyphonicAfterTouch++
cbk.channel = channel
cbk.pitch = pitch
cbk.pressure = pressure
cbk.time = time
}
func (cbk *CountingLexerCallback) Tempo(bpm uint32, microsecondsPerCrotchet uint32, time uint32) {
// TODO USE
cbk.tempo++
cbk.microsecondsPerCrotchet = microsecondsPerCrotchet
cbk.bpm = bpm
cbk.time = time
}
func (cbk *CountingLexerCallback) ControlChange(channel uint8, controller uint8, value uint8, time uint32) {
cbk.controlChange++
}
func (cbk *CountingLexerCallback) ProgramChange(channel uint8, program uint8, time uint32) {
cbk.programChange++
}
func (cbk *CountingLexerCallback) ChannelAfterTouch(channel uint8, pressure uint8, time uint32) {
cbk.channelAfterTouch++
cbk.channel = channel
cbk.pressure = pressure
cbk.time = time
}
func (cbk *CountingLexerCallback) PitchWheel(channel uint8, value int16, absValue uint16, time uint32) {
cbk.pitchWheel++
cbk.pitchWheelValue = value
cbk.pitchWheelValueAbsolute = absValue
cbk.time = time
cbk.channel = channel
}
func (cbk *CountingLexerCallback) TimeCodeQuarter(messageType uint8, values uint8, time uint32) {
cbk.timeCodeQuarter++
}
func (cbk *CountingLexerCallback) SongPositionPointer(beats uint16, time uint32) {
cbk.songPositionPointer++
}
func (cbk *CountingLexerCallback) SongSelect(song uint8, time uint32) { cbk.songSelect++ }
func (cbk *CountingLexerCallback) Undefined1(time uint32) { cbk.undefined1++ }
func (cbk *CountingLexerCallback) Undefined2(time uint32) { cbk.undefined2++ }
func (cbk *CountingLexerCallback) TuneRequest(time uint32) { cbk.tuneRequest++ }
func (cbk *CountingLexerCallback) TimingClock(time uint32) { cbk.timingClock++ }
func (cbk *CountingLexerCallback) Undefined3(time uint32) { cbk.undefined3++ }
func (cbk *CountingLexerCallback) Start(time uint32) { cbk.start++ }
func (cbk *CountingLexerCallback) Continue(time uint32) { cbk.continue_++ }
func (cbk *CountingLexerCallback) Stop(time uint32) { cbk.stop++ }
func (cbk *CountingLexerCallback) Undefined4(time uint32) { cbk.undefined4++ }
func (cbk *CountingLexerCallback) ActiveSensing(time uint32) { cbk.activeSensing++ }
func (cbk *CountingLexerCallback) Reset(time uint32) { cbk.reset++ }
func (cbk *CountingLexerCallback) Done(time uint32) { cbk.done++ }
func (cbk *CountingLexerCallback) SequenceNumber(channel uint8, number uint16, numberGiven bool, time uint32) {
cbk.sequenceNumber++
cbk.time = time
cbk.sequenceNumberValue = number
cbk.sequenceNumberGiven = numberGiven
}
func (cbk *CountingLexerCallback) Text(channel uint8, text string, time uint32) {
cbk.text++
cbk.textValue = text
cbk.time = time
}
func (cbk *CountingLexerCallback) CopyrightText(channel uint8, text string, time uint32) {
cbk.copyrightText++
cbk.textValue = text
cbk.time = time
}
func (cbk *CountingLexerCallback) SequenceName(channel uint8, text string, time uint32) {
cbk.sequenceName++
cbk.textValue = text
cbk.time = time
}
func (cbk *CountingLexerCallback) TrackInstrumentName(channel uint8, text string, time uint32) {
cbk.trackInstrumentName++
cbk.textValue = text
cbk.time = time
}
func (cbk *CountingLexerCallback) LyricText(channel uint8, text string, time uint32) {
cbk.lyricText++
cbk.textValue = text
cbk.time = time
}
func (cbk *CountingLexerCallback) MarkerText(channel uint8, text string, time uint32) {
cbk.markerText++
cbk.textValue = text
cbk.time = time
}
func (cbk *CountingLexerCallback) CuePointText(channel uint8, text string, time uint32) {
cbk.cuePointText++
cbk.textValue = text
cbk.time = time
}
func (cbk *CountingLexerCallback) EndOfTrack(channel uint8, time uint32) {
cbk.endOfTrack++
cbk.time = time
}
func (cbk *CountingLexerCallback) TimeSignature(numerator uint8, denomenator uint8, clocksPerClick uint8, demiSemiQuaverPerQuarter uint8, time uint32) {
cbk.numerator = numerator
cbk.denomenator = denomenator
cbk.clocksPerClick = clocksPerClick
cbk.demiSemiQuaverPerQuarter = demiSemiQuaverPerQuarter
cbk.time = time
}
func (*CountingLexerCallback) KeySignature(key ScaleDegree, mode KeySignatureMode, sharpsOrFlats int8) {
// TODO fill out when tests written.
}
// MockReadSeeker is a mock Reader and Seeker. Constructed with data, behaves as a file reader.
// This is used to pass MIDI data to the Lexer and also to the MIDI value parsing functions.
type MockReadSeeker struct {
data *[]byte
position int64
}
// NewMockReadSeeker creates a new MockReadSeeker object backed by the given byte array data.
func NewMockReadSeeker(data *[]byte) *MockReadSeeker {
return &MockReadSeeker{data: data}
}
// Read fills the given buffer, returning the number of bytes and an error.
func (reader *MockReadSeeker) Read(p []byte) (n int, err error) {
var amount = int64(len(p))
var maxAmount = int64(len(*reader.data)) - reader.position
// Don't read past the end
if amount > maxAmount {
amount = maxAmount
}
copy(p, (*reader.data)[reader.position:reader.position+amount])
reader.position += amount
return int(amount), nil
}
// Seek sets the offset for the next Read or Write to offset, interpreted according to the value of `whence`:
// 0 means relative to the origin of the file, 1 means relative to the current offset, and 2 means relative to the end.
// Seek returns the new offset and an Error, if any.
func (reader *MockReadSeeker) Seek(offset int64, whence int) (ret int64, err error) {
switch whence {
case 0:
{
if offset > int64(len(*reader.data)) {
return -1, io.EOF
}
reader.position = offset
return reader.position, nil
}
case 1:
{
if offset+reader.position > int64(len(*reader.data)) {
return -1, io.EOF
}
reader.position += offset
return reader.position, nil
}
case 2:
{
if offset > int64(len(*reader.data)) {
return -1, io.EOF
}
reader.position = int64(len(*reader.data)) - offset
return reader.position, nil
}
}
return
}