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35 lines
1.0 KiB
35 lines
1.0 KiB
// 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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