feat: add parseEpisodeNumbers test

integrations/playback/allanime/availability_test.go

@@ -0,0 +1,15 @@
+package allanime
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestParseEpisodeNumbersKeepsOnlyPositiveIntegers(t *testing.T) {
+	got := parseEpisodeNumbers([]string{"1", " 2 ", "2", "0", "-1", "12.5", "SP1", "6"})
+	want := []int{1, 2, 6}
+
+	if !reflect.DeepEqual(got, want) {
+		t.Fatalf("parseEpisodeNumbers() = %v, want %v", got, want)
+	}
+}