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time: skip ZoneAbbr test in timezones with no abbreviation

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The testZoneAbbr assumes that

  Parse(RFC1123, t1.Format(RFC1123))

will always succeed. This is not true because Format will fall back to
the numeric zone (ex. -07) for timezones with no abbreviation, but
Parse won't accept the numeric zone when the layout specifies 'MST'
(an abbreviation).

Skip the zone abbreviation test in timezones with no abbreviation.

Fixes #21183

Change-Id: If04691cc23ae1075d8a953733024e17f5a7646de
Reviewed-on: https://go-review.googlesource.com/52430
Run-TryBot: Alberto Donizetti <alb.donizetti@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Alberto Donizetti 2017-08-01 17:41:51 +02:00 committed by Brad Fitzpatrick
parent 6f08c935a9
commit 193eda7291
1 changed files with 8 additions and 0 deletions
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8
src/time/zoneinfo_windows_test.go
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@ -14,6 +14,14 @@ func testZoneAbbr(t *testing.T) {
t1 := Now()
// discard nsec
t1 = Date(t1.Year(), t1.Month(), t1.Day(), t1.Hour(), t1.Minute(), t1.Second(), 0, t1.Location())
// Skip the test if we're in a timezone with no abbreviation.
// Format will fallback to the numeric abbreviation, and
// Parse(RFC1123, ..) will fail (see Issue 21183).
if tz := t1.Format("MST"); tz[0] == '-' || tz[0] == '+' {
t.Skip("No zone abbreviation")
}
t2, err := Parse(RFC1123, t1.Format(RFC1123))
if err != nil {
t.Fatalf("Parse failed: %v", err)