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# -*- encoding: binary -*-
# Copyright (C) 2013, Eric Wong <normalperson@yhbt.net>
# License: GPLv3 or later (https://www.gnu.org/licenses/gpl-3.0.txt)
require './test/helper'
require 'tempfile'
require 'dtas/format'

class TestFormat < Minitest::Unit::TestCase
  def test_initialize
    fmt = DTAS::Format.new
    assert_equal %w(-ts32 -c2 -r44100), fmt.to_sox_arg
    hash = fmt.to_hsh
    assert_equal({}, hash)
  end

  def test_nonstandard
    fmt = DTAS::Format.new
    fmt.type = "s16"
    fmt.rate = 48000
    fmt.channels = 4
    hash = fmt.to_hsh
    assert_kind_of Hash, hash
    assert_equal %w(channels rate type), hash.keys.sort
    assert_equal "s16", hash["type"]
    assert_equal 48000, hash["rate"]
    assert_equal 4, hash["channels"]

    # back to stereo
    fmt.channels = 2
    hash = fmt.to_hsh
    assert_equal %w(rate type), hash.keys.sort
    assert_equal "s16", hash["type"]
    assert_equal 48000, hash["rate"]
    assert_nil hash["channels"]
  end

  def test_from_file
    Tempfile.open(%w(tmp .wav)) do |tmp|
      # generate an empty file with 1s of audio
      cmd = %W(sox -r 96000 -b 24 -c 2 -n #{tmp.path} trim 0 1)
      system(*cmd)
      assert $?.success?, "#{cmd.inspect} failed: #$?"
      fmt = DTAS::Format.new
      fmt.from_file tmp.path
      assert_equal 96000, fmt.rate
      assert_equal 2, fmt.channels
      tmp.unlink
    end
  end

  def test_bytes_per_sample
    fmt = DTAS::Format.new
    assert_equal 4, fmt.bytes_per_sample
    fmt.type = "f64"
    assert_equal 8, fmt.bytes_per_sample
    fmt.type = "f32"
    assert_equal 4, fmt.bytes_per_sample
    fmt.type = "s16"
    assert_equal 2, fmt.bytes_per_sample
  end
end