test_that("Reading files works", {
  w <- readAudio(system.file("extdata/AUDIOMOTH.WAV", package="sonicscrewdriver"))
  expect_equal(length(w@left), 240000)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@bit, 16)
  expect_equal(w@pcm, TRUE)
  expect_equal(w@stereo, FALSE)
  rm(w)

  w <- readAudio(system.file("extdata/AUDIOMOTH.WAV", package="sonicscrewdriver"), units="samples")
  expect_equal(length(w@left), 240000)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@bit, 16)
  expect_equal(w@pcm, TRUE)
  expect_equal(w@stereo, FALSE)
  rm(w)

  w <- readAudio(system.file("extdata/AUDIOMOTH.WAV", package="sonicscrewdriver"), mime="audio/x-wav")
  expect_equal(length(w@left), 240000)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@bit, 16)
  expect_equal(w@pcm, TRUE)
  expect_equal
  rm(w)

  w <- readAudio(system.file("extdata/AUDIOMOTH.WAV", package="sonicscrewdriver"), from=48001, to=48000*2, units="samples")
  expect_equal(length(w@left), 48000)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@pcm, TRUE)
  expect_equal(w@stereo, FALSE)
  expect_equal(length(w@left), w@samp.rate)
  rm(w)

  w <- readAudio(system.file("extdata/AUDIOMOTH.WAV", package="sonicscrewdriver"), from = 1, to = 2, units = "seconds")
  expect_equal(length(w@left), 48000)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@bit, 16)
  expect_equal(w@pcm, TRUE)
  expect_equal(w@stereo, FALSE)
  expect_equal(length(w@left), w@samp.rate)
  rm(w)

  w <- readAudio(system.file("extdata/AUDIOMOTH.mp3", package="sonicscrewdriver"))
  expect_equal(length(w@left), 241920)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@bit, 16)
  expect_equal(w@pcm, TRUE)
  expect_equal(w@stereo, FALSE)
  rm(w)

  w <- readAudio(system.file("extdata/AUDIOMOTH.mp3", package="sonicscrewdriver"), units="samples")
  expect_equal(length(w@left), 241920)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@bit, 16)
  expect_equal(w@pcm, TRUE)
  expect_equal(w@stereo, FALSE)
  rm(w)

  w <- readAudio(system.file("extdata/AUDIOMOTH.mp3", package="sonicscrewdriver"), mime="audio/mpeg")
  expect_equal(length(w@left), 241920)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@bit, 16)
  expect_equal(w@pcm, TRUE)
  expect_equal(w@stereo, FALSE)
  rm(w)

  w <- readAudio(system.file("extdata/AUDIOMOTH.mp3", package="sonicscrewdriver"), mime="audio/mpeg", from = 1, to = 2, units = "seconds")
  expect_equal(length(w@left), 48000)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@bit, 16)
  expect_equal(w@pcm, TRUE)
  expect_equal(w@stereo, FALSE)
  expect_equal(length(w@left), w@samp.rate)
  rm(w)

  w <- readAudio(system.file("extdata/AUDIOMOTH.flac", package="sonicscrewdriver"))
  expect_equal(length(w@left), 240000)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@pcm, TRUE)
  expect_equal(w@stereo, FALSE)
  rm(w)

  w <- readAudio(system.file("extdata/AUDIOMOTH.flac", package="sonicscrewdriver"), units="samples")
  expect_equal(length(w@left), 240000)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@pcm, TRUE)
  expect_equal(w@stereo, FALSE)
  rm(w)

  w <- readAudio(system.file("extdata/AUDIOMOTH.flac", package="sonicscrewdriver"), from=48001, to=48000*2, units="samples")
  expect_equal(length(w@left), 48000)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@pcm, TRUE)
  expect_equal(w@stereo, FALSE)
  expect_equal(length(w@left), w@samp.rate)
  rm(w)

  w <- readAudio(system.file("extdata/AUDIOMOTH.flac", package="sonicscrewdriver"), from=1, to=2, units="seconds")
  expect_equal(length(w@left), 48000)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@pcm, TRUE)
  expect_equal(w@stereo, FALSE)
  expect_equal(length(w@left), w@samp.rate)
  rm(w)

  w <- readAudio(system.file("extdata/STEREO.WAV", package="sonicscrewdriver"))
  expect_equal(length(w@left), 240000)
  expect_equal(length(w@left), 240000)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@bit, 16)
  expect_equal(w@pcm, TRUE)
  expect_equal(w@stereo, TRUE)
  rm(w)

  w <- readAudio(system.file("extdata/STEREO.WAV", package="sonicscrewdriver"), from=1, to=2, units="seconds")
  expect_equal(length(w@left), 48000)
  expect_equal(length(w@left), 48000)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@bit, 16)
  expect_equal(w@pcm, TRUE)
  expect_equal(w@stereo, TRUE)
  rm(w)

  w <- readAudio(system.file("extdata/STEREO.WAV", package="sonicscrewdriver"), from=48001, to=48000*2, units="samples")
  expect_equal(length(w@left), 48000)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@pcm, TRUE)
  expect_equal(w@stereo, TRUE)
  expect_equal(length(w@left), w@samp.rate)
  rm(w)

  w <- readAudio(system.file("extdata/STEREO.flac", package="sonicscrewdriver"))
  expect_equal(length(w@left), 240000)
  expect_equal(length(w@left), 240000)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@bit, 32)
  expect_equal(w@pcm, TRUE)
  expect_equal(w@stereo, TRUE)
  rm(w)

  w <- readAudio(system.file("extdata/STEREO.flac", package="sonicscrewdriver"), from=1, to=2, units="seconds")
  expect_equal(length(w@left), 48000)
  expect_equal(length(w@left), 48000)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@bit, 32)
  expect_equal(w@pcm, TRUE)
  expect_equal(w@stereo, TRUE)
  rm(w)

  w <- readAudio(system.file("extdata/STEREO.flac", package="sonicscrewdriver"), from=48001, to=48000*2, units="samples")
  expect_equal(length(w@left), 48000)
  expect_equal(w@samp.rate, 48000)
  expect_equal(w@pcm, TRUE)
  expect_equal(w@stereo, TRUE)
  expect_equal(length(w@left), w@samp.rate)
  rm(w)

  # TODO: empty.wav

})

test_that("readAudio rejects bad files", {
  expect_error(readAudio(system.file("extdata/CONFIG.TXT", package="sonicscrewdriver")), "Could not determine number of channels.")
})

test_that(".bitdepth gives correct output", {
  expect_equal(.bitdepth(2^8/2), 8)
  expect_equal(.bitdepth(2^8/2+1), 16)
  expect_equal(.bitdepth(2^16/2), 16)
  expect_equal(.bitdepth(2^16/2+1), 24)
  expect_equal(.bitdepth(2^24/2), 24)
  expect_equal(.bitdepth(2^24/2+1), 32)
  expect_equal(.bitdepth(2^32/2), 32)
  expect_error(.bitdepth(2^64/2+1), "Bit depths above 32bit are not supported.")
})