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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 12:36:04 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 12:36:04 +0000 |
commit | b09c6d56832eb1718c07d74abf3bc6ae3fe4e030 (patch) | |
tree | d2caec2610d4ea887803ec9e9c3cd77136c448ba /dependencies/pkg/mod/github.com/google/uuid@v1.3.0/seq_test.go | |
parent | Initial commit. (diff) | |
download | icingadb-upstream.tar.xz icingadb-upstream.zip |
Adding upstream version 1.1.0.upstream/1.1.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dependencies/pkg/mod/github.com/google/uuid@v1.3.0/seq_test.go')
-rw-r--r-- | dependencies/pkg/mod/github.com/google/uuid@v1.3.0/seq_test.go | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/dependencies/pkg/mod/github.com/google/uuid@v1.3.0/seq_test.go b/dependencies/pkg/mod/github.com/google/uuid@v1.3.0/seq_test.go new file mode 100644 index 0000000..4f6c549 --- /dev/null +++ b/dependencies/pkg/mod/github.com/google/uuid@v1.3.0/seq_test.go @@ -0,0 +1,66 @@ +// Copyright 2016 Google Inc. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package uuid + +import ( + "flag" + "runtime" + "testing" + "time" +) + +// This test is only run when --regressions is passed on the go test line. +var regressions = flag.Bool("regressions", false, "run uuid regression tests") + +// TestClockSeqRace tests for a particular race condition of returning two +// identical Version1 UUIDs. The duration of 1 minute was chosen as the race +// condition, before being fixed, nearly always occurred in under 30 seconds. +func TestClockSeqRace(t *testing.T) { + if !*regressions { + t.Skip("skipping regression tests") + } + duration := time.Minute + + done := make(chan struct{}) + defer close(done) + + ch := make(chan UUID, 10000) + ncpu := runtime.NumCPU() + switch ncpu { + case 0, 1: + // We can't run the test effectively. + t.Skip("skipping race test, only one CPU detected") + return + default: + runtime.GOMAXPROCS(ncpu) + } + for i := 0; i < ncpu; i++ { + go func() { + for { + select { + case <-done: + return + case ch <- Must(NewUUID()): + } + } + }() + } + + uuids := make(map[string]bool) + cnt := 0 + start := time.Now() + for u := range ch { + s := u.String() + if uuids[s] { + t.Errorf("duplicate uuid after %d in %v: %s", cnt, time.Since(start), s) + return + } + uuids[s] = true + if time.Since(start) > duration { + return + } + cnt++ + } +} |