refactor: make not ugly

cmd/06/problem/problem_test.go

@@ -0,0 +1,19 @@
+package problem_test
+
+import (
+	"testing"
+
+	"github.com/StevanFreeborn/advent-of-code-2025/cmd/06/problem"
+)
+
+func TestSolve(t *testing.T) {
+	expected := 6
+	operator := "+"
+	operands := []int{1, 2, 3}
+
+	result := problem.From(operator, operands).Solve()
+
+	if result != expected {
+		t.Errorf("expected %d, got %d", expected, result)
+	}
+}