package util

import (
	"fmt"
	"testing"
)

func TestNoteFreq(t *testing.T) {
	type TestCase struct {
		In  int
		Out float64
	}

	testCases := []TestCase{
		{108, 4186.01},
		{81, 880},
		{69, 440},
		{58, 233.08},
		{57, 220},
		{56, 207.65},
		{55, 196},
		{36, 65.41},
	}

	for _, tc := range testCases {
		out := NoteFreq(tc.In)
		if fmt.Sprintf("%.2f", out) != fmt.Sprintf("%.2f", tc.Out) {
			t.Fatalf("%v != %v", out, tc.Out)
		}
	}
}