add local MXL video adapter

internal/adapter/mxl/video_test.go

@@ -0,0 +1,75 @@
+package mxladapter
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"mxl-player/internal/playback"
+	"mxl-player/internal/source"
+)
+
+func TestVideoFactoryOpenVideoCanceled(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+
+	reader, err := (VideoFactory{}).OpenVideo(ctx, playback.FeedConfig{})
+	if reader != nil {
+		t.Fatal("OpenVideo() reader is not nil after cancellation")
+	}
+	if !errors.Is(err, context.Canceled) {
+		t.Fatalf("OpenVideo() error = %v, want context.Canceled", err)
+	}
+}
+
+func TestVideoFactoryOpenVideoRejectsInvalidConfig(t *testing.T) {
+	tests := []struct {
+		name   string
+		config playback.FeedConfig
+	}{
+		{
+			name:   "feed is not configured",
+			config: playback.FeedConfig{},
+		},
+		{
+			name: "active feed has no UUID",
+			config: playback.FeedConfig{
+				Domain: "/dev/shm/mxl",
+				Active: true,
+			},
+		},
+		{
+			name: "configured feed has no domain",
+			config: playback.FeedConfig{
+				UUID:   "video-uuid",
+				Active: true,
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			reader, err := (VideoFactory{}).OpenVideo(
+				context.Background(),
+				tt.config,
+			)
+
+			if reader != nil {
+				t.Fatal("OpenVideo() reader is not nil for invalid config")
+			}
+			if err == nil {
+				t.Fatal("OpenVideo() error is nil for invalid config")
+			}
+			if got := source.KindOf(err); got != source.ErrorKindInvalidConfig {
+				t.Fatalf(
+					"source.KindOf(OpenVideo()) = %v, want %v",
+					got,
+					source.ErrorKindInvalidConfig,
+				)
+			}
+			if ShouldRetry(err) {
+				t.Fatal("ShouldRetry(OpenVideo()) = true for invalid config")
+			}
+		})
+	}
+}