package main

import (
	"math"
	"testing"
)

func TestGKI(t *testing.T) {
	r := Reading{
		Glucose: 77,
		Ketone:  1.1,
	}
	expected := (77.0 / 18) / 1.1
	epsilon := 0.0001 // Tolerance level
	gki, _ := r.GKI()

	if math.Abs(gki-expected) > epsilon {
		t.Errorf("expected %v, got %v", expected, gki)
	}
}