package api

import "testing"

func TestTierFromRank(t *testing.T) {
	cases := []struct {
		rank, total int
		want        string
	}{
		{1, 1, "champion"},
		{1, 100, "champion"},
		{1, 0, "bronze"},    // zero total → bronze (guard)
		{0, 100, "bronze"},  // zero rank → bronze (guard)
		{10, 100, "gold"},   // exactly 10%
		{11, 100, "silver"}, // 11%
		{30, 100, "silver"}, // exactly 30%
		{31, 100, "bronze"}, // 31%
		{5, 50, "gold"},     // 10%
		{15, 50, "silver"},  // exactly 30%
		{16, 50, "bronze"},  // 32% → bronze
		{50, 100, "bronze"},
		{2, 10, "silver"},   // 20% → silver
		{1, 10, "champion"},
	}
	for _, c := range cases {
		got := tierFromRank(c.rank, c.total)
		if got != c.want {
			t.Errorf("tierFromRank(%d, %d) = %q; want %q", c.rank, c.total, got, c.want)
		}
	}
}