github.com/AESNooper/go/src@v0.0.0-20220218095104-b56a4ab1bbbb/time/internal_test.go (about)

     1  // Copyright 2011 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package time
     6  
     7  func init() {
     8  	// force US/Pacific for time zone tests
     9  	ForceUSPacificForTesting()
    10  }
    11  
    12  func initTestingZone() {
    13  	z, err := loadLocation("America/Los_Angeles", zoneSources[len(zoneSources)-1:])
    14  	if err != nil {
    15  		panic("cannot load America/Los_Angeles for testing: " + err.Error() + "; you may want to use -tags=timetzdata")
    16  	}
    17  	z.name = "Local"
    18  	localLoc = *z
    19  }
    20  
    21  var OrigZoneSources = zoneSources
    22  
    23  func forceZipFileForTesting(zipOnly bool) {
    24  	zoneSources = make([]string, len(OrigZoneSources))
    25  	copy(zoneSources, OrigZoneSources)
    26  	if zipOnly {
    27  		zoneSources = zoneSources[len(zoneSources)-1:]
    28  	}
    29  }
    30  
    31  var Interrupt = interrupt
    32  var DaysIn = daysIn
    33  
    34  func empty(arg interface{}, seq uintptr) {}
    35  
    36  // Test that a runtimeTimer with a period that would overflow when on
    37  // expiration does not throw or cause other timers to hang.
    38  //
    39  // This test has to be in internal_test.go since it fiddles with
    40  // unexported data structures.
    41  func CheckRuntimeTimerPeriodOverflow() {
    42  	// We manually create a runtimeTimer with huge period, but that expires
    43  	// immediately. The public Timer interface would require waiting for
    44  	// the entire period before the first update.
    45  	r := &runtimeTimer{
    46  		when:   runtimeNano(),
    47  		period: 1<<63 - 1,
    48  		f:      empty,
    49  		arg:    nil,
    50  	}
    51  	startTimer(r)
    52  	defer stopTimer(r)
    53  
    54  	// If this test fails, we will either throw (when siftdownTimer detects
    55  	// bad when on update), or other timers will hang (if the timer in a
    56  	// heap is in a bad state). There is no reliable way to test this, but
    57  	// we wait on a short timer here as a smoke test (alternatively, timers
    58  	// in later tests may hang).
    59  	<-After(25 * Millisecond)
    60  }
    61  
    62  var (
    63  	MinMonoTime = Time{wall: 1 << 63, ext: -1 << 63, loc: UTC}
    64  	MaxMonoTime = Time{wall: 1 << 63, ext: 1<<63 - 1, loc: UTC}
    65  
    66  	NotMonoNegativeTime = Time{wall: 0, ext: -1<<63 + 50}
    67  )