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36 lines
1.0 KiB
36 lines
1.0 KiB
3 years ago
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// Copyright 2021 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package testutil
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import (
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"net"
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"testing"
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)
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// RandomUnprivilegedPort returns valid unprivileged random port number which can be used for testing.
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func RandomUnprivilegedPort(t *testing.T) int {
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t.Helper()
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listener, err := net.Listen("tcp", ":0")
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if err != nil {
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t.Fatalf("Listening on random port: %v", err)
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}
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if err := listener.Close(); err != nil {
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t.Fatalf("Closing listener: %v", err)
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}
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return listener.Addr().(*net.TCPAddr).Port
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}
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