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71029cea2d
This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com>
31 lines
734 B
Go
31 lines
734 B
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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// Package tstest provides utilities for use in unit tests.
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package tstest
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import (
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"context"
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"time"
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"tailscale.com/logtail/backoff"
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"tailscale.com/types/logger"
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)
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// WaitFor retries try for up to maxWait.
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// It returns nil once try returns nil the first time.
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// If maxWait passes without success, it returns try's last error.
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func WaitFor(maxWait time.Duration, try func() error) error {
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bo := backoff.NewBackoff("wait-for", logger.Discard, maxWait/4)
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deadline := time.Now().Add(maxWait)
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var err error
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for time.Now().Before(deadline) {
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err = try()
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if err == nil {
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break
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}
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bo.BackOff(context.Background(), err)
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}
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return err
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}
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