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📁 ..
📄 embed.go(304 B)
📄 example_test.go(22.43 KB)
📄 export_android_test.go(438 B)
📄 export_test.go(3.96 KB)
📄 export_windows_test.go(514 B)
📄 format.go(48.45 KB)
📄 format_rfc3339.go(5.68 KB)
📄 format_test.go(35.92 KB)
📄 genzabbrs.go(2.95 KB)
📄 internal_test.go(2.21 KB)
📄 mono_test.go(8.29 KB)
📄 sleep.go(5.66 KB)
📄 sleep_test.go(18.5 KB)
📄 sys_plan9.go(1016 B)
📄 sys_unix.go(1.38 KB)
📄 sys_windows.go(1.1 KB)
📁 testdata
📄 tick.go(2.28 KB)
📄 tick_test.go(4.01 KB)
📄 time.go(49.63 KB)
📄 time_test.go(56.04 KB)
📁 tzdata
📄 tzdata_test.go(2.46 KB)
📄 zoneinfo.go(18.15 KB)
📄 zoneinfo_abbrs_windows.go(10.48 KB)
📄 zoneinfo_android.go(2.19 KB)
📄 zoneinfo_android_test.go(386 B)
📄 zoneinfo_goroot.go(348 B)
📄 zoneinfo_ios.go(1.05 KB)
📄 zoneinfo_js.go(1.03 KB)
📄 zoneinfo_plan9.go(2.69 KB)
📄 zoneinfo_read.go(14.31 KB)
📄 zoneinfo_test.go(9.91 KB)
📄 zoneinfo_unix.go(1.69 KB)
📄 zoneinfo_unix_test.go(2.31 KB)
📄 zoneinfo_wasip1.go(307 B)
📄 zoneinfo_windows.go(6.57 KB)
📄 zoneinfo_windows_test.go(1.84 KB)

Editing: zoneinfo_unix_test.go

// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build unix && !ios && !android

package time_test

import (
	"os"
	"testing"
	"time"
)

func TestEnvTZUsage(t *testing.T) {
	const env = "TZ"
	tz, ok := os.LookupEnv(env)
	if !ok {
		defer os.Unsetenv(env)
	} else {
		defer os.Setenv(env, tz)
	}
	defer time.ForceUSPacificForTesting()

localZoneName := "Local"
	// The file may not exist.
	if _, err := os.Stat("/etc/localtime"); os.IsNotExist(err) {
		localZoneName = "UTC"
	}

cases := []struct {
		nilFlag bool
		tz      string
		local   string
	}{
		// no $TZ means use the system default /etc/localtime.
		{true, "", localZoneName},
		// $TZ="" means use UTC.
		{false, "", "UTC"},
		{false, ":", "UTC"},
		{false, "Asia/Shanghai", "Asia/Shanghai"},
		{false, ":Asia/Shanghai", "Asia/Shanghai"},
		{false, "/etc/localtime", localZoneName},
		{false, ":/etc/localtime", localZoneName},
	}

for _, c := range cases {
		time.ResetLocalOnceForTest()
		if c.nilFlag {
			os.Unsetenv(env)
		} else {
			os.Setenv(env, c.tz)
		}
		if time.Local.String() != c.local {
			t.Errorf("invalid Local location name for %q: got %q want %q", c.tz, time.Local, c.local)
		}
	}

time.ResetLocalOnceForTest()
	// The file may not exist on Solaris 2 and IRIX 6.
	path := "/usr/share/zoneinfo/Asia/Shanghai"
	os.Setenv(env, path)
	if _, err := os.Stat(path); os.IsNotExist(err) {
		if time.Local.String() != "UTC" {
			t.Errorf(`invalid path should fallback to UTC: got %q want "UTC"`, time.Local)
		}
		return
	}
	if time.Local.String() != path {
		t.Errorf(`custom path should lead to path itself: got %q want %q`, time.Local, path)
	}

timeInUTC := time.Date(2009, 1, 1, 12, 0, 0, 0, time.UTC)
	sameTimeInShanghai := time.Date(2009, 1, 1, 20, 0, 0, 0, time.Local)
	if !timeInUTC.Equal(sameTimeInShanghai) {
		t.Errorf("invalid timezone: got %q want %q", timeInUTC, sameTimeInShanghai)
	}

time.ResetLocalOnceForTest()
	os.Setenv(env, ":"+path)
	if time.Local.String() != path {
		t.Errorf(`custom path should lead to path itself: got %q want %q`, time.Local, path)
	}

time.ResetLocalOnceForTest()
	os.Setenv(env, path[:len(path)-1])
	if time.Local.String() != "UTC" {
		t.Errorf(`invalid path should fallback to UTC: got %q want "UTC"`, time.Local)
	}
}

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Editing: zoneinfo_unix_test.go

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