...
Run Format

Source file src/time/format_test.go

Documentation: time

  // Copyright 2009 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.
  
  package time_test
  
  import (
  	"fmt"
  	"strconv"
  	"strings"
  	"testing"
  	"testing/quick"
  	. "time"
  )
  
  type TimeFormatTest struct {
  	time           Time
  	formattedValue string
  }
  
  var rfc3339Formats = []TimeFormatTest{
  	{Date(2008, 9, 17, 20, 4, 26, 0, UTC), "2008-09-17T20:04:26Z"},
  	{Date(1994, 9, 17, 20, 4, 26, 0, FixedZone("EST", -18000)), "1994-09-17T20:04:26-05:00"},
  	{Date(2000, 12, 26, 1, 15, 6, 0, FixedZone("OTO", 15600)), "2000-12-26T01:15:06+04:20"},
  }
  
  func TestRFC3339Conversion(t *testing.T) {
  	for _, f := range rfc3339Formats {
  		if f.time.Format(RFC3339) != f.formattedValue {
  			t.Error("RFC3339:")
  			t.Errorf("  want=%+v", f.formattedValue)
  			t.Errorf("  have=%+v", f.time.Format(RFC3339))
  		}
  	}
  }
  
  type FormatTest struct {
  	name   string
  	format string
  	result string
  }
  
  var formatTests = []FormatTest{
  	{"ANSIC", ANSIC, "Wed Feb  4 21:00:57 2009"},
  	{"UnixDate", UnixDate, "Wed Feb  4 21:00:57 PST 2009"},
  	{"RubyDate", RubyDate, "Wed Feb 04 21:00:57 -0800 2009"},
  	{"RFC822", RFC822, "04 Feb 09 21:00 PST"},
  	{"RFC850", RFC850, "Wednesday, 04-Feb-09 21:00:57 PST"},
  	{"RFC1123", RFC1123, "Wed, 04 Feb 2009 21:00:57 PST"},
  	{"RFC1123Z", RFC1123Z, "Wed, 04 Feb 2009 21:00:57 -0800"},
  	{"RFC3339", RFC3339, "2009-02-04T21:00:57-08:00"},
  	{"RFC3339Nano", RFC3339Nano, "2009-02-04T21:00:57.0123456-08:00"},
  	{"Kitchen", Kitchen, "9:00PM"},
  	{"am/pm", "3pm", "9pm"},
  	{"AM/PM", "3PM", "9PM"},
  	{"two-digit year", "06 01 02", "09 02 04"},
  	// Three-letter months and days must not be followed by lower-case letter.
  	{"Janet", "Hi Janet, the Month is January", "Hi Janet, the Month is February"},
  	// Time stamps, Fractional seconds.
  	{"Stamp", Stamp, "Feb  4 21:00:57"},
  	{"StampMilli", StampMilli, "Feb  4 21:00:57.012"},
  	{"StampMicro", StampMicro, "Feb  4 21:00:57.012345"},
  	{"StampNano", StampNano, "Feb  4 21:00:57.012345600"},
  }
  
  func TestFormat(t *testing.T) {
  	// The numeric time represents Thu Feb  4 21:00:57.012345600 PST 2010
  	time := Unix(0, 1233810057012345600)
  	for _, test := range formatTests {
  		result := time.Format(test.format)
  		if result != test.result {
  			t.Errorf("%s expected %q got %q", test.name, test.result, result)
  		}
  	}
  }
  
  // issue 12440.
  func TestFormatSingleDigits(t *testing.T) {
  	time := Date(2001, 2, 3, 4, 5, 6, 700000000, UTC)
  	test := FormatTest{"single digit format", "3:4:5", "4:5:6"}
  	result := time.Format(test.format)
  	if result != test.result {
  		t.Errorf("%s expected %q got %q", test.name, test.result, result)
  	}
  }
  
  func TestFormatShortYear(t *testing.T) {
  	years := []int{
  		-100001, -100000, -99999,
  		-10001, -10000, -9999,
  		-1001, -1000, -999,
  		-101, -100, -99,
  		-11, -10, -9,
  		-1, 0, 1,
  		9, 10, 11,
  		99, 100, 101,
  		999, 1000, 1001,
  		9999, 10000, 10001,
  		99999, 100000, 100001,
  	}
  
  	for _, y := range years {
  		time := Date(y, January, 1, 0, 0, 0, 0, UTC)
  		result := time.Format("2006.01.02")
  		var want string
  		if y < 0 {
  			// The 4 in %04d counts the - sign, so print -y instead
  			// and introduce our own - sign.
  			want = fmt.Sprintf("-%04d.%02d.%02d", -y, 1, 1)
  		} else {
  			want = fmt.Sprintf("%04d.%02d.%02d", y, 1, 1)
  		}
  		if result != want {
  			t.Errorf("(jan 1 %d).Format(\"2006.01.02\") = %q, want %q", y, result, want)
  		}
  	}
  }
  
  type ParseTest struct {
  	name       string
  	format     string
  	value      string
  	hasTZ      bool // contains a time zone
  	hasWD      bool // contains a weekday
  	yearSign   int  // sign of year, -1 indicates the year is not present in the format
  	fracDigits int  // number of digits of fractional second
  }
  
  var parseTests = []ParseTest{
  	{"ANSIC", ANSIC, "Thu Feb  4 21:00:57 2010", false, true, 1, 0},
  	{"UnixDate", UnixDate, "Thu Feb  4 21:00:57 PST 2010", true, true, 1, 0},
  	{"RubyDate", RubyDate, "Thu Feb 04 21:00:57 -0800 2010", true, true, 1, 0},
  	{"RFC850", RFC850, "Thursday, 04-Feb-10 21:00:57 PST", true, true, 1, 0},
  	{"RFC1123", RFC1123, "Thu, 04 Feb 2010 21:00:57 PST", true, true, 1, 0},
  	{"RFC1123", RFC1123, "Thu, 04 Feb 2010 22:00:57 PDT", true, true, 1, 0},
  	{"RFC1123Z", RFC1123Z, "Thu, 04 Feb 2010 21:00:57 -0800", true, true, 1, 0},
  	{"RFC3339", RFC3339, "2010-02-04T21:00:57-08:00", true, false, 1, 0},
  	{"custom: \"2006-01-02 15:04:05-07\"", "2006-01-02 15:04:05-07", "2010-02-04 21:00:57-08", true, false, 1, 0},
  	// Optional fractional seconds.
  	{"ANSIC", ANSIC, "Thu Feb  4 21:00:57.0 2010", false, true, 1, 1},
  	{"UnixDate", UnixDate, "Thu Feb  4 21:00:57.01 PST 2010", true, true, 1, 2},
  	{"RubyDate", RubyDate, "Thu Feb 04 21:00:57.012 -0800 2010", true, true, 1, 3},
  	{"RFC850", RFC850, "Thursday, 04-Feb-10 21:00:57.0123 PST", true, true, 1, 4},
  	{"RFC1123", RFC1123, "Thu, 04 Feb 2010 21:00:57.01234 PST", true, true, 1, 5},
  	{"RFC1123Z", RFC1123Z, "Thu, 04 Feb 2010 21:00:57.01234 -0800", true, true, 1, 5},
  	{"RFC3339", RFC3339, "2010-02-04T21:00:57.012345678-08:00", true, false, 1, 9},
  	{"custom: \"2006-01-02 15:04:05\"", "2006-01-02 15:04:05", "2010-02-04 21:00:57.0", false, false, 1, 0},
  	// Amount of white space should not matter.
  	{"ANSIC", ANSIC, "Thu Feb 4 21:00:57 2010", false, true, 1, 0},
  	{"ANSIC", ANSIC, "Thu      Feb     4     21:00:57     2010", false, true, 1, 0},
  	// Case should not matter
  	{"ANSIC", ANSIC, "THU FEB 4 21:00:57 2010", false, true, 1, 0},
  	{"ANSIC", ANSIC, "thu feb 4 21:00:57 2010", false, true, 1, 0},
  	// Fractional seconds.
  	{"millisecond", "Mon Jan _2 15:04:05.000 2006", "Thu Feb  4 21:00:57.012 2010", false, true, 1, 3},
  	{"microsecond", "Mon Jan _2 15:04:05.000000 2006", "Thu Feb  4 21:00:57.012345 2010", false, true, 1, 6},
  	{"nanosecond", "Mon Jan _2 15:04:05.000000000 2006", "Thu Feb  4 21:00:57.012345678 2010", false, true, 1, 9},
  	// Leading zeros in other places should not be taken as fractional seconds.
  	{"zero1", "2006.01.02.15.04.05.0", "2010.02.04.21.00.57.0", false, false, 1, 1},
  	{"zero2", "2006.01.02.15.04.05.00", "2010.02.04.21.00.57.01", false, false, 1, 2},
  	// Month and day names only match when not followed by a lower-case letter.
  	{"Janet", "Hi Janet, the Month is January: Jan _2 15:04:05 2006", "Hi Janet, the Month is February: Feb  4 21:00:57 2010", false, true, 1, 0},
  
  	// GMT with offset.
  	{"GMT-8", UnixDate, "Fri Feb  5 05:00:57 GMT-8 2010", true, true, 1, 0},
  
  	// Accept any number of fractional second digits (including none) for .999...
  	// In Go 1, .999... was completely ignored in the format, meaning the first two
  	// cases would succeed, but the next four would not. Go 1.1 accepts all six.
  	{"", "2006-01-02 15:04:05.9999 -0700 MST", "2010-02-04 21:00:57 -0800 PST", true, false, 1, 0},
  	{"", "2006-01-02 15:04:05.999999999 -0700 MST", "2010-02-04 21:00:57 -0800 PST", true, false, 1, 0},
  	{"", "2006-01-02 15:04:05.9999 -0700 MST", "2010-02-04 21:00:57.0123 -0800 PST", true, false, 1, 4},
  	{"", "2006-01-02 15:04:05.999999999 -0700 MST", "2010-02-04 21:00:57.0123 -0800 PST", true, false, 1, 4},
  	{"", "2006-01-02 15:04:05.9999 -0700 MST", "2010-02-04 21:00:57.012345678 -0800 PST", true, false, 1, 9},
  	{"", "2006-01-02 15:04:05.999999999 -0700 MST", "2010-02-04 21:00:57.012345678 -0800 PST", true, false, 1, 9},
  
  	// issue 4502.
  	{"", StampNano, "Feb  4 21:00:57.012345678", false, false, -1, 9},
  	{"", "Jan _2 15:04:05.999", "Feb  4 21:00:57.012300000", false, false, -1, 4},
  	{"", "Jan _2 15:04:05.999", "Feb  4 21:00:57.012345678", false, false, -1, 9},
  	{"", "Jan _2 15:04:05.999999999", "Feb  4 21:00:57.0123", false, false, -1, 4},
  	{"", "Jan _2 15:04:05.999999999", "Feb  4 21:00:57.012345678", false, false, -1, 9},
  }
  
  func TestParse(t *testing.T) {
  	for _, test := range parseTests {
  		time, err := Parse(test.format, test.value)
  		if err != nil {
  			t.Errorf("%s error: %v", test.name, err)
  		} else {
  			checkTime(time, &test, t)
  		}
  	}
  }
  
  // All parsed with ANSIC.
  var dayOutOfRangeTests = []struct {
  	date string
  	ok   bool
  }{
  	{"Thu Jan 99 21:00:57 2010", false},
  	{"Thu Jan 31 21:00:57 2010", true},
  	{"Thu Jan 32 21:00:57 2010", false},
  	{"Thu Feb 28 21:00:57 2012", true},
  	{"Thu Feb 29 21:00:57 2012", true},
  	{"Thu Feb 29 21:00:57 2010", false},
  	{"Thu Mar 31 21:00:57 2010", true},
  	{"Thu Mar 32 21:00:57 2010", false},
  	{"Thu Apr 30 21:00:57 2010", true},
  	{"Thu Apr 31 21:00:57 2010", false},
  	{"Thu May 31 21:00:57 2010", true},
  	{"Thu May 32 21:00:57 2010", false},
  	{"Thu Jun 30 21:00:57 2010", true},
  	{"Thu Jun 31 21:00:57 2010", false},
  	{"Thu Jul 31 21:00:57 2010", true},
  	{"Thu Jul 32 21:00:57 2010", false},
  	{"Thu Aug 31 21:00:57 2010", true},
  	{"Thu Aug 32 21:00:57 2010", false},
  	{"Thu Sep 30 21:00:57 2010", true},
  	{"Thu Sep 31 21:00:57 2010", false},
  	{"Thu Oct 31 21:00:57 2010", true},
  	{"Thu Oct 32 21:00:57 2010", false},
  	{"Thu Nov 30 21:00:57 2010", true},
  	{"Thu Nov 31 21:00:57 2010", false},
  	{"Thu Dec 31 21:00:57 2010", true},
  	{"Thu Dec 32 21:00:57 2010", false},
  	{"Thu Dec 00 21:00:57 2010", false},
  }
  
  func TestParseDayOutOfRange(t *testing.T) {
  	for _, test := range dayOutOfRangeTests {
  		_, err := Parse(ANSIC, test.date)
  		switch {
  		case test.ok && err == nil:
  			// OK
  		case !test.ok && err != nil:
  			if !strings.Contains(err.Error(), "day out of range") {
  				t.Errorf("%q: expected 'day' error, got %v", test.date, err)
  			}
  		case test.ok && err != nil:
  			t.Errorf("%q: unexpected error: %v", test.date, err)
  		case !test.ok && err == nil:
  			t.Errorf("%q: expected 'day' error, got none", test.date)
  		}
  	}
  }
  
  // TestParseInLocation checks that the Parse and ParseInLocation
  // functions do not get confused by the fact that AST (Arabia Standard
  // Time) and AST (Atlantic Standard Time) are different time zones,
  // even though they have the same abbreviation.
  //
  // ICANN has been slowly phasing out invented abbreviation in favor of
  // numeric time zones (for example, the Asia/Baghdad time zone
  // abbreviation got changed from AST to +03 in the 2017a tzdata
  // release); but we still want to make sure that the time package does
  // not get confused on systems with slightly older tzdata packages.
  func TestParseInLocation(t *testing.T) {
  
  	baghdad, err := LoadLocation("Asia/Baghdad")
  	if err != nil {
  		t.Fatal(err)
  	}
  
  	var t1, t2 Time
  
  	t1, err = ParseInLocation("Jan 02 2006 MST", "Feb 01 2013 AST", baghdad)
  	if err != nil {
  		t.Fatal(err)
  	}
  
  	_, offset := t1.Zone()
  
  	// A zero offset means that ParseInLocation did not recognize the
  	// 'AST' abbreviation as matching the current location (Baghdad,
  	// where we'd expect a +03 hrs offset); likely because we're using
  	// a recent tzdata release (2017a or newer).
  	// If it happens, skip the Baghdad test.
  	if offset != 0 {
  		t2 = Date(2013, February, 1, 00, 00, 00, 0, baghdad)
  		if t1 != t2 {
  			t.Fatalf("ParseInLocation(Feb 01 2013 AST, Baghdad) = %v, want %v", t1, t2)
  		}
  		if offset != 3*60*60 {
  			t.Fatalf("ParseInLocation(Feb 01 2013 AST, Baghdad).Zone = _, %d, want _, %d", offset, 3*60*60)
  		}
  	}
  
  	blancSablon, err := LoadLocation("America/Blanc-Sablon")
  	if err != nil {
  		t.Fatal(err)
  	}
  
  	// In this case 'AST' means 'Atlantic Standard Time', and we
  	// expect the abbreviation to correctly match the american
  	// location.
  	t1, err = ParseInLocation("Jan 02 2006 MST", "Feb 01 2013 AST", blancSablon)
  	if err != nil {
  		t.Fatal(err)
  	}
  	t2 = Date(2013, February, 1, 00, 00, 00, 0, blancSablon)
  	if t1 != t2 {
  		t.Fatalf("ParseInLocation(Feb 01 2013 AST, Blanc-Sablon) = %v, want %v", t1, t2)
  	}
  	_, offset = t1.Zone()
  	if offset != -4*60*60 {
  		t.Fatalf("ParseInLocation(Feb 01 2013 AST, Blanc-Sablon).Zone = _, %d, want _, %d", offset, -4*60*60)
  	}
  }
  
  func TestLoadLocationZipFile(t *testing.T) {
  	ForceZipFileForTesting(true)
  	defer ForceZipFileForTesting(false)
  
  	_, err := LoadLocation("Australia/Sydney")
  	if err != nil {
  		t.Fatal(err)
  	}
  }
  
  var rubyTests = []ParseTest{
  	{"RubyDate", RubyDate, "Thu Feb 04 21:00:57 -0800 2010", true, true, 1, 0},
  	// Ignore the time zone in the test. If it parses, it'll be OK.
  	{"RubyDate", RubyDate, "Thu Feb 04 21:00:57 -0000 2010", false, true, 1, 0},
  	{"RubyDate", RubyDate, "Thu Feb 04 21:00:57 +0000 2010", false, true, 1, 0},
  	{"RubyDate", RubyDate, "Thu Feb 04 21:00:57 +1130 2010", false, true, 1, 0},
  }
  
  // Problematic time zone format needs special tests.
  func TestRubyParse(t *testing.T) {
  	for _, test := range rubyTests {
  		time, err := Parse(test.format, test.value)
  		if err != nil {
  			t.Errorf("%s error: %v", test.name, err)
  		} else {
  			checkTime(time, &test, t)
  		}
  	}
  }
  
  func checkTime(time Time, test *ParseTest, t *testing.T) {
  	// The time should be Thu Feb  4 21:00:57 PST 2010
  	if test.yearSign >= 0 && test.yearSign*time.Year() != 2010 {
  		t.Errorf("%s: bad year: %d not %d", test.name, time.Year(), 2010)
  	}
  	if time.Month() != February {
  		t.Errorf("%s: bad month: %s not %s", test.name, time.Month(), February)
  	}
  	if time.Day() != 4 {
  		t.Errorf("%s: bad day: %d not %d", test.name, time.Day(), 4)
  	}
  	if time.Hour() != 21 {
  		t.Errorf("%s: bad hour: %d not %d", test.name, time.Hour(), 21)
  	}
  	if time.Minute() != 0 {
  		t.Errorf("%s: bad minute: %d not %d", test.name, time.Minute(), 0)
  	}
  	if time.Second() != 57 {
  		t.Errorf("%s: bad second: %d not %d", test.name, time.Second(), 57)
  	}
  	// Nanoseconds must be checked against the precision of the input.
  	nanosec, err := strconv.ParseUint("012345678"[:test.fracDigits]+"000000000"[:9-test.fracDigits], 10, 0)
  	if err != nil {
  		panic(err)
  	}
  	if time.Nanosecond() != int(nanosec) {
  		t.Errorf("%s: bad nanosecond: %d not %d", test.name, time.Nanosecond(), nanosec)
  	}
  	name, offset := time.Zone()
  	if test.hasTZ && offset != -28800 {
  		t.Errorf("%s: bad tz offset: %s %d not %d", test.name, name, offset, -28800)
  	}
  	if test.hasWD && time.Weekday() != Thursday {
  		t.Errorf("%s: bad weekday: %s not %s", test.name, time.Weekday(), Thursday)
  	}
  }
  
  func TestFormatAndParse(t *testing.T) {
  	const fmt = "Mon MST " + RFC3339 // all fields
  	f := func(sec int64) bool {
  		t1 := Unix(sec/2, 0)
  		if t1.Year() < 1000 || t1.Year() > 9999 || t1.Unix() != sec {
  			// not required to work
  			return true
  		}
  		t2, err := Parse(fmt, t1.Format(fmt))
  		if err != nil {
  			t.Errorf("error: %s", err)
  			return false
  		}
  		if t1.Unix() != t2.Unix() || t1.Nanosecond() != t2.Nanosecond() {
  			t.Errorf("FormatAndParse %d: %q(%d) %q(%d)", sec, t1, t1.Unix(), t2, t2.Unix())
  			return false
  		}
  		return true
  	}
  	f32 := func(sec int32) bool { return f(int64(sec)) }
  	cfg := &quick.Config{MaxCount: 10000}
  
  	// Try a reasonable date first, then the huge ones.
  	if err := quick.Check(f32, cfg); err != nil {
  		t.Fatal(err)
  	}
  	if err := quick.Check(f, cfg); err != nil {
  		t.Fatal(err)
  	}
  }
  
  type ParseTimeZoneTest struct {
  	value  string
  	length int
  	ok     bool
  }
  
  var parseTimeZoneTests = []ParseTimeZoneTest{
  	{"gmt hi there", 0, false},
  	{"GMT hi there", 3, true},
  	{"GMT+12 hi there", 6, true},
  	{"GMT+00 hi there", 3, true}, // 0 or 00 is not a legal offset.
  	{"GMT-5 hi there", 5, true},
  	{"GMT-51 hi there", 3, true},
  	{"ChST hi there", 4, true},
  	{"MeST hi there", 4, true},
  	{"MSDx", 3, true},
  	{"MSDY", 0, false}, // four letters must end in T.
  	{"ESAST hi", 5, true},
  	{"ESASTT hi", 0, false}, // run of upper-case letters too long.
  	{"ESATY hi", 0, false},  // five letters must end in T.
  	{"WITA hi", 4, true},    // Issue #18251
  }
  
  func TestParseTimeZone(t *testing.T) {
  	for _, test := range parseTimeZoneTests {
  		length, ok := ParseTimeZone(test.value)
  		if ok != test.ok {
  			t.Errorf("expected %t for %q got %t", test.ok, test.value, ok)
  		} else if length != test.length {
  			t.Errorf("expected %d for %q got %d", test.length, test.value, length)
  		}
  	}
  }
  
  type ParseErrorTest struct {
  	format string
  	value  string
  	expect string // must appear within the error
  }
  
  var parseErrorTests = []ParseErrorTest{
  	{ANSIC, "Feb  4 21:00:60 2010", "cannot parse"}, // cannot parse Feb as Mon
  	{ANSIC, "Thu Feb  4 21:00:57 @2010", "cannot parse"},
  	{ANSIC, "Thu Feb  4 21:00:60 2010", "second out of range"},
  	{ANSIC, "Thu Feb  4 21:61:57 2010", "minute out of range"},
  	{ANSIC, "Thu Feb  4 24:00:60 2010", "hour out of range"},
  	{"Mon Jan _2 15:04:05.000 2006", "Thu Feb  4 23:00:59x01 2010", "cannot parse"},
  	{"Mon Jan _2 15:04:05.000 2006", "Thu Feb  4 23:00:59.xxx 2010", "cannot parse"},
  	{"Mon Jan _2 15:04:05.000 2006", "Thu Feb  4 23:00:59.-123 2010", "fractional second out of range"},
  	// issue 4502. StampNano requires exactly 9 digits of precision.
  	{StampNano, "Dec  7 11:22:01.000000", `cannot parse ".000000" as ".000000000"`},
  	{StampNano, "Dec  7 11:22:01.0000000000", "extra text: 0"},
  	// issue 4493. Helpful errors.
  	{RFC3339, "2006-01-02T15:04:05Z07:00", `parsing time "2006-01-02T15:04:05Z07:00": extra text: 07:00`},
  	{RFC3339, "2006-01-02T15:04_abc", `parsing time "2006-01-02T15:04_abc" as "2006-01-02T15:04:05Z07:00": cannot parse "_abc" as ":"`},
  	{RFC3339, "2006-01-02T15:04:05_abc", `parsing time "2006-01-02T15:04:05_abc" as "2006-01-02T15:04:05Z07:00": cannot parse "_abc" as "Z07:00"`},
  	{RFC3339, "2006-01-02T15:04:05Z_abc", `parsing time "2006-01-02T15:04:05Z_abc": extra text: _abc`},
  	// invalid second followed by optional fractional seconds
  	{RFC3339, "2010-02-04T21:00:67.012345678-08:00", "second out of range"},
  }
  
  func TestParseErrors(t *testing.T) {
  	for _, test := range parseErrorTests {
  		_, err := Parse(test.format, test.value)
  		if err == nil {
  			t.Errorf("expected error for %q %q", test.format, test.value)
  		} else if !strings.Contains(err.Error(), test.expect) {
  			t.Errorf("expected error with %q for %q %q; got %s", test.expect, test.format, test.value, err)
  		}
  	}
  }
  
  func TestNoonIs12PM(t *testing.T) {
  	noon := Date(0, January, 1, 12, 0, 0, 0, UTC)
  	const expect = "12:00PM"
  	got := noon.Format("3:04PM")
  	if got != expect {
  		t.Errorf("got %q; expect %q", got, expect)
  	}
  	got = noon.Format("03:04PM")
  	if got != expect {
  		t.Errorf("got %q; expect %q", got, expect)
  	}
  }
  
  func TestMidnightIs12AM(t *testing.T) {
  	midnight := Date(0, January, 1, 0, 0, 0, 0, UTC)
  	expect := "12:00AM"
  	got := midnight.Format("3:04PM")
  	if got != expect {
  		t.Errorf("got %q; expect %q", got, expect)
  	}
  	got = midnight.Format("03:04PM")
  	if got != expect {
  		t.Errorf("got %q; expect %q", got, expect)
  	}
  }
  
  func Test12PMIsNoon(t *testing.T) {
  	noon, err := Parse("3:04PM", "12:00PM")
  	if err != nil {
  		t.Fatal("error parsing date:", err)
  	}
  	if noon.Hour() != 12 {
  		t.Errorf("got %d; expect 12", noon.Hour())
  	}
  	noon, err = Parse("03:04PM", "12:00PM")
  	if err != nil {
  		t.Fatal("error parsing date:", err)
  	}
  	if noon.Hour() != 12 {
  		t.Errorf("got %d; expect 12", noon.Hour())
  	}
  }
  
  func Test12AMIsMidnight(t *testing.T) {
  	midnight, err := Parse("3:04PM", "12:00AM")
  	if err != nil {
  		t.Fatal("error parsing date:", err)
  	}
  	if midnight.Hour() != 0 {
  		t.Errorf("got %d; expect 0", midnight.Hour())
  	}
  	midnight, err = Parse("03:04PM", "12:00AM")
  	if err != nil {
  		t.Fatal("error parsing date:", err)
  	}
  	if midnight.Hour() != 0 {
  		t.Errorf("got %d; expect 0", midnight.Hour())
  	}
  }
  
  // Check that a time without a Zone still produces a (numeric) time zone
  // when formatted with MST as a requested zone.
  func TestMissingZone(t *testing.T) {
  	time, err := Parse(RubyDate, "Thu Feb 02 16:10:03 -0500 2006")
  	if err != nil {
  		t.Fatal("error parsing date:", err)
  	}
  	expect := "Thu Feb  2 16:10:03 -0500 2006" // -0500 not EST
  	str := time.Format(UnixDate)               // uses MST as its time zone
  	if str != expect {
  		t.Errorf("got %s; expect %s", str, expect)
  	}
  }
  
  func TestMinutesInTimeZone(t *testing.T) {
  	time, err := Parse(RubyDate, "Mon Jan 02 15:04:05 +0123 2006")
  	if err != nil {
  		t.Fatal("error parsing date:", err)
  	}
  	expected := (1*60 + 23) * 60
  	_, offset := time.Zone()
  	if offset != expected {
  		t.Errorf("ZoneOffset = %d, want %d", offset, expected)
  	}
  }
  
  type SecondsTimeZoneOffsetTest struct {
  	format         string
  	value          string
  	expectedoffset int
  }
  
  var secondsTimeZoneOffsetTests = []SecondsTimeZoneOffsetTest{
  	{"2006-01-02T15:04:05-070000", "1871-01-01T05:33:02-003408", -(34*60 + 8)},
  	{"2006-01-02T15:04:05-07:00:00", "1871-01-01T05:33:02-00:34:08", -(34*60 + 8)},
  	{"2006-01-02T15:04:05-070000", "1871-01-01T05:33:02+003408", 34*60 + 8},
  	{"2006-01-02T15:04:05-07:00:00", "1871-01-01T05:33:02+00:34:08", 34*60 + 8},
  	{"2006-01-02T15:04:05Z070000", "1871-01-01T05:33:02-003408", -(34*60 + 8)},
  	{"2006-01-02T15:04:05Z07:00:00", "1871-01-01T05:33:02+00:34:08", 34*60 + 8},
  	{"2006-01-02T15:04:05-07", "1871-01-01T05:33:02+01", 1 * 60 * 60},
  	{"2006-01-02T15:04:05-07", "1871-01-01T05:33:02-02", -2 * 60 * 60},
  	{"2006-01-02T15:04:05Z07", "1871-01-01T05:33:02-02", -2 * 60 * 60},
  }
  
  func TestParseSecondsInTimeZone(t *testing.T) {
  	// should accept timezone offsets with seconds like: Zone America/New_York   -4:56:02 -      LMT     1883 Nov 18 12:03:58
  	for _, test := range secondsTimeZoneOffsetTests {
  		time, err := Parse(test.format, test.value)
  		if err != nil {
  			t.Fatal("error parsing date:", err)
  		}
  		_, offset := time.Zone()
  		if offset != test.expectedoffset {
  			t.Errorf("ZoneOffset = %d, want %d", offset, test.expectedoffset)
  		}
  	}
  }
  
  func TestFormatSecondsInTimeZone(t *testing.T) {
  	for _, test := range secondsTimeZoneOffsetTests {
  		d := Date(1871, 1, 1, 5, 33, 2, 0, FixedZone("LMT", test.expectedoffset))
  		timestr := d.Format(test.format)
  		if timestr != test.value {
  			t.Errorf("Format = %s, want %s", timestr, test.value)
  		}
  	}
  }
  
  // Issue 11334.
  func TestUnderscoreTwoThousand(t *testing.T) {
  	format := "15:04_20060102"
  	input := "14:38_20150618"
  	time, err := Parse(format, input)
  	if err != nil {
  		t.Error(err)
  	}
  	if y, m, d := time.Date(); y != 2015 || m != 6 || d != 18 {
  		t.Errorf("Incorrect y/m/d, got %d/%d/%d", y, m, d)
  	}
  	if h := time.Hour(); h != 14 {
  		t.Errorf("Incorrect hour, got %d", h)
  	}
  	if m := time.Minute(); m != 38 {
  		t.Errorf("Incorrect minute, got %d", m)
  	}
  }
  

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