package main

import (
	"testing"
	"time"
)

func TestParseDuration(t *testing.T) {
	tests := []struct {
		in string
		// out or fail are mutually exclusive
		out  time.Duration
		fail bool
	}{
		{in: "10ms", out: 10 * time.Millisecond},
		{in: "3s", out: 3 * time.Second},
		{in: "60m", out: 60 * time.Minute},
		{in: "12h", out: 12 * time.Hour},
		{in: "7d", out: 168 * time.Hour},

		{in: "", fail: true},
		{in: "0", fail: true},
		{in: "7ns", fail: true},
		{in: "14mo", fail: true},
		{in: "3.5h", fail: true},
		{in: "106752d", fail: true}, // overflow
	}
	for _, tc := range tests {
		got, err := parseDuration(tc.in)
		if !tc.fail && err != nil {
			t.Errorf("parseDuration(%q) unexpectedly failed: %v", tc.in, err)
			continue
		}
		if tc.fail && err == nil {
			t.Errorf("parseDuration(%q) did not fail", tc.in)
			continue
		}
		if tc.fail {
			continue
		}
		if got != tc.out {
			t.Errorf("parseDuration(%q) = %v, want %v", tc.in, got, tc.out)
		}
	}
}