Added tests

Author: AlexEidt

.gitignore

@@ -1,4 +1 @@
-*.gif
-*.mp4
-
-vidio_test.go
+*.gif

test/koala-noaudio.mp4

@@ -0,0 +1,156 @@
+package vidio
+
+import (
+	"fmt"
+	"os"
+	"testing"
+)
+
+func assertEquals(expected, actual interface{}) {
+	if expected != actual {
+		panic(fmt.Sprintf("Expected %v, got %v", expected, actual))
+	}
+}
+
+func TestVideoMetaData(t *testing.T) {
+	video := NewVideo("test/koala.mp4")
+	defer video.Close()
+
+	assertEquals(video.filename, "test/koala.mp4")
+	assertEquals(video.width, 480)
+	assertEquals(video.height, 270)
+	assertEquals(video.depth, 3)
+	assertEquals(video.bitrate, 170549)
+	assertEquals(video.frames, 101)
+	assertEquals(video.duration, 3.366667)
+	assertEquals(video.fps, float64(30))
+	assertEquals(video.codec, "h264")
+	assertEquals(video.audio_codec, "aac")
+	assertEquals(video.pix_fmt, "yuv420p")
+	assertEquals(len(video.framebuffer), 0)
+
+	if video.pipe != nil {
+		panic("Expected video.pipe to be nil")
+	}
+	if video.cmd != nil {
+		panic("Expected video.cmd to be nil")
+	}
+
+	fmt.Println("Video Meta Data Test Passed")
+}
+
+func TestVideoFrame(t *testing.T) {
+	video := NewVideo("test/koala.mp4")
+	defer video.Close()
+
+	video.Read()
+	// [203 222 134 203 222 134 203 222 134 203]
+	assertEquals(video.framebuffer[0], uint8(203))
+	assertEquals(video.framebuffer[1], uint8(222))
+	assertEquals(video.framebuffer[2], uint8(134))
+	assertEquals(video.framebuffer[3], uint8(203))
+	assertEquals(video.framebuffer[4], uint8(222))
+	assertEquals(video.framebuffer[5], uint8(134))
+	assertEquals(video.framebuffer[6], uint8(203))
+	assertEquals(video.framebuffer[7], uint8(222))
+	assertEquals(video.framebuffer[8], uint8(134))
+	assertEquals(video.framebuffer[9], uint8(203))
+
+	fmt.Println("Video Frame Test Passed")
+}
+
+func TestVideoWriting(t *testing.T) {
+	testWriting := func(input, output string, audio bool) {
+		video := NewVideo(input)
+		options := Options{
+			fps:     video.fps,
+			bitrate: video.bitrate,
+			codec:   video.codec,
+		}
+		if audio {
+			options.audio = input
+		}
+
+		writer := NewVideoWriter(output, video.width, video.height, &options)
+		for video.Read() {
+			writer.Write(video.framebuffer)
+		}
+		writer.Close()
+
+		os.Remove(output)
+	}
+
+	testWriting("test/koala.mp4", "test/koala-out.mp4", true)
+	fmt.Println("Video Writing (with Audio) Test Passed")
+	testWriting("test/koala-noaudio.mp4", "test/koala-noaudio-out.mp4", false)
+	fmt.Println("Video Writing (without Audio) Test Passed")
+}
+
+func TestFFprobe(t *testing.T) {
+	koalaVideo := ffprobe("test/koala.mp4", "v")
+	assertEquals(koalaVideo["width"], "480")
+	assertEquals(koalaVideo["height"], "270")
+	assertEquals(koalaVideo["duration"], "3.366667")
+	assertEquals(koalaVideo["bit_rate"], "170549")
+	assertEquals(koalaVideo["codec_name"], "h264")
+	koalaAudio := ffprobe("test/koala.mp4", "a")
+	assertEquals(koalaAudio["codec_name"], "aac")
+
+	koalaVideo = ffprobe("test/koala-noaudio.mp4", "v")
+	assertEquals(koalaVideo["width"], "480")
+	assertEquals(koalaVideo["height"], "270")
+	assertEquals(koalaVideo["duration"], "3.366667")
+	assertEquals(koalaVideo["bit_rate"], "170549")
+	assertEquals(koalaVideo["codec_name"], "h264")
+	koalaAudio = ffprobe("test/koala-noaudio.mp4", "a")
+	assertEquals(len(koalaAudio), 0)
+
+	fmt.Println("FFprobe Test Passed")
+}
+
+// Linux and MacOS allow the user to directly choose a camera stream by index.
+// Windows requires the user to give the device name.
+func TestDeviceParsingWindows(t *testing.T) {
+	// Sample string taken from FFmpeg wiki:
+	data := parseDevices(
+		[]byte(`ffmpeg version N-45279-g6b86dd5... --enable-runtime-cpudetect
+  libavutil      51. 74.100 / 51. 74.100
+  libavcodec     54. 65.100 / 54. 65.100
+  libavformat    54. 31.100 / 54. 31.100
+  libavdevice    54.  3.100 / 54.  3.100
+  libavfilter     3. 19.102 /  3. 19.102
+  libswscale      2.  1.101 /  2.  1.101
+  libswresample   0. 16.100 /  0. 16.100
+[dshow @ 03ACF580] DirectShow video devices
+[dshow @ 03ACF580]  "Integrated Camera"
+[dshow @ 03ACF580]  "screen-capture-recorder"
+[dshow @ 03ACF580] DirectShow audio devices
+[dshow @ 03ACF580]  "Internal Microphone (Conexant 2"
+[dshow @ 03ACF580]  "virtual-audio-capturer"
+dummy: Immediate exit requested`,
+		),
+	)
+
+	assertEquals(data[0], "Integrated Camera")
+	assertEquals(data[1], "screen-capture-recorder")
+
+	fmt.Println("Device Parsing for Windows Test Passed")
+}
+
+func TestWebcamParsing(t *testing.T) {
+	camera := &Camera{}
+	getCameraData(
+		`Input #0, dshow, from 'video=Integrated Camera':
+  Duration: N/A, start: 1367309.442000, bitrate: N/A
+  Stream #0:0: Video: mjpeg (Baseline) (MJPG / 0x47504A4D), yuvj422p(pc, bt470bg/unknown/unknown), 1280x720, 30 fps, 30 tbr, 10000k tbn
+At least one output file must be specified`,
+		camera,
+	)
+
+	assertEquals(camera.width, 1280)
+	assertEquals(camera.height, 720)
+	assertEquals(camera.fps, float64(30))
+	assertEquals(camera.codec, "mjpeg")
+
+	fmt.Println("Webcam Parsing Test Passed")
+}