feat: solve day 8 part 1...twice

cmd/08/estimator/estimator_test.go

@@ -0,0 +1,35 @@
+package estimator_test
+
+import (
+	"testing"
+
+	"github.com/StevanFreeborn/advent-of-code-2025/cmd/08/box"
+	"github.com/StevanFreeborn/advent-of-code-2025/cmd/08/estimator"
+)
+
+func TestFrom(t *testing.T) {
+	result := estimator.From([]box.Box{})
+
+	if result == nil {
+		t.Errorf("estimator.From returned nil; expected non-nil value")
+	}
+
+	if len(result.PossibleConnections()) != 0 {
+		t.Errorf("estimator.From returned estimator with PossibleConnections() = %d; expected 0", result.PossibleConnections())
+	}
+}
+
+func TestPossibleConnections(t *testing.T) {
+	expectedNumOfConnections := 1
+
+	est := estimator.From([]box.Box{
+		box.From("0,0,0"),
+		box.From("1,1,1"),
+	})
+
+	result := est.PossibleConnections()
+
+	if len(result) != expectedNumOfConnections {
+		t.Errorf("PossibleConnections() returned %d connections; expected %d", len(result), expectedNumOfConnections)
+	}
+}