av/device/webcam/webcam_test.go

/*
DESCRIPTION
  webcam_test.go tests the webcam AVDevice.

AUTHORS
  Scott Barnard <scott@ausocean.org>

LICENSE
  Copyright (C) 2020 the Australian Ocean Lab (AusOcean)

  It is free software: you can redistribute it and/or modify them
  under the terms of the GNU General Public License as published by the
  Free Software Foundation, either version 3 of the License, or (at your
  option) any later version.

  It is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  for more details.

  You should have received a copy of the GNU General Public License
  in gpl.txt.  If not, see http://www.gnu.org/licenses.
*/

// Package webcam provides an implementation of AVDevice for webcams.
package webcam

import (
	"bytes"
	"testing"
	"time"

	"bitbucket.org/ausocean/av/codec/codecutil"
	"bitbucket.org/ausocean/av/revid/config"
	"bitbucket.org/ausocean/utils/logger"
)

func TestIsRunning(t *testing.T) {
	const dur = 250 * time.Millisecond

	l := logger.New(logger.Debug, &bytes.Buffer{}, true) // Discard logs.
	d := New(l)

	err := d.Set(config.Config{
		Logger:     l,
		InputCodec: codecutil.H264,
	})
	if err != nil {
		t.Skipf("could not set device: %w", err)
	}

	err = d.Start()
	if err != nil {
		t.Fatalf("could not start device %w", err)
	}

	time.Sleep(dur)

	if !d.IsRunning() {
		t.Error("device isn't running, when it should be")
	}

	err = d.Stop()
	if err != nil {
		t.Error(err.Error())
	}

	time.Sleep(dur)

	if d.IsRunning() {
		t.Error("device is running, when it should not be")
	}
}