my-log/tools/parse_date_test.go

package tools

import (
	"fmt"
	"testing"
	"time"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

const day = time.Hour * 24

func TestParseDate(t *testing.T) {
	now := time.Now().Local()
	y, mon, d, h, loc := now.Year(), now.Month(), now.Day(), now.Hour(), now.Location()
	sec := now.Truncate(time.Second)
	today := time.Date(y, mon, d, 0, 0, 0, 0, loc)
	tomorrow := today.Add(day)
	yesterday := today.Add(-day)
	twoMin := now.Add(2 * time.Minute).Truncate(time.Minute)
	twoHour := time.Date(y, mon, d, h+2, 0, 0, 0, loc)
	firstMonth := time.Date(y, mon, 1, 0, 0, 0, 0, loc)
	firstYear := time.Date(y, 1, 1, 0, 0, 0, 0, loc)
	exact := "2075-02-12T12:13:54.536-02:00"
	exactd, _ := time.ParseInLocation(time.RFC3339, exact, time.FixedZone("UTC-02:00", -7200))
	var ts int64 = 1708876012
	tsd := time.Unix(ts, 0)
	ent := "February 25, 2024 at 04:00:13AM +0230"
	entd, _ := time.Parse(DateFormat, ent)

	tests := []struct {
		name string
		exp  time.Time
		err  string
	}{
		{"now", sec, ""},
		{"today", today, ""},
		{"tomorrow", tomorrow, ""},
		{"yesterday", yesterday, ""},
		{"in two minutes", twoMin, ""},
		{"in two hours", twoHour, ""},
		{"this month", firstMonth, ""},
		{"this year", firstYear, ""},
		{"min", MinTime, ""},
		{"max", MaxTime, ""},
		{exact, exactd, ""},
		{fmt.Sprint(ts), tsd, ""},
		{ent, entd, ""},
		{"not a date", now, fmt.Sprintf(`failed to parse "%s": unknown format`, "not a date")},
	}
	for _, tt := range tests {
		t.Run(tt.name, getDateTest(tt.name, tt.exp, tt.err))
	}
}

func getDateTest(in string, exp time.Time, err string) func(t *testing.T) {
	return func(t *testing.T) {
		out, er := ParseDate(in)
		if err != "" {
			assert.ErrorContains(t, er, err)
		} else {
			require.NoError(t, er)

			assert.Equal(t, exp, out)
		}
	}
}