feat: solve day 8 part 1...twice

cmd/08/connection/connection_test.go

@@ -0,0 +1,28 @@
+package connection_test
+
+import (
+	"testing"
+
+	"github.com/StevanFreeborn/advent-of-code-2025/cmd/08/box"
+	"github.com/StevanFreeborn/advent-of-code-2025/cmd/08/connection"
+)
+
+func TestFrom(t *testing.T) {
+	start := box.From("1,2,3")
+	end := box.From("4,5,6")
+	expectedDistance := start.DistanceFrom(end)
+
+	conn := connection.From(start, end)
+
+	if conn.Start() != start {
+		t.Errorf("Connection Start() = %v; want %v", conn.Start(), start)
+	}
+
+	if conn.End() != end {
+		t.Errorf("Connection End() = %v; want %v", conn.End(), end)
+	}
+
+	if conn.Distance() != expectedDistance {
+		t.Errorf("Connection Distance() = %v; want %v", conn.Distance(), expectedDistance)
+	}
+}