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90 lines
2.6 KiB
90 lines
2.6 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 tsdbutil |
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import ( |
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"fmt" |
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"os" |
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"testing" |
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"github.com/go-kit/log" |
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prom_testutil "github.com/prometheus/client_golang/prometheus/testutil" |
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"github.com/stretchr/testify/require" |
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"github.com/prometheus/prometheus/util/testutil" |
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) |
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// TestDirLockerUsage performs a set of tests which guarantee correct usage of |
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// DirLocker. open should use data as the storage directory, and createLock |
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// to determine if a lock file should be used. |
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func TestDirLockerUsage(t *testing.T, open func(t *testing.T, data string, createLock bool) (*DirLocker, testutil.Closer)) { |
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t.Helper() |
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cases := []struct { |
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fileAlreadyExists bool |
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lockFileDisabled bool |
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expectedValue int |
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}{ |
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{ |
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fileAlreadyExists: false, |
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lockFileDisabled: false, |
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expectedValue: lockfileCreatedCleanly, |
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}, |
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{ |
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fileAlreadyExists: true, |
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lockFileDisabled: false, |
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expectedValue: lockfileReplaced, |
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}, |
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{ |
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fileAlreadyExists: true, |
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lockFileDisabled: true, |
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expectedValue: lockfileDisabled, |
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}, |
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{ |
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fileAlreadyExists: false, |
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lockFileDisabled: true, |
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expectedValue: lockfileDisabled, |
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}, |
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} |
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for _, c := range cases { |
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t.Run(fmt.Sprintf("%+v", c), func(t *testing.T) { |
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tmpdir, err := os.MkdirTemp("", "test") |
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require.NoError(t, err) |
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t.Cleanup(func() { |
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require.NoError(t, os.RemoveAll(tmpdir)) |
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}) |
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// Test preconditions (file already exists + lockfile option) |
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if c.fileAlreadyExists { |
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tmpLocker, err := NewDirLocker(tmpdir, "tsdb", log.NewNopLogger(), nil) |
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require.NoError(t, err) |
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err = os.WriteFile(tmpLocker.path, []byte{}, 0o644) |
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require.NoError(t, err) |
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} |
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locker, closer := open(t, tmpdir, !c.lockFileDisabled) |
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require.Equal(t, float64(c.expectedValue), prom_testutil.ToFloat64(locker.createdCleanly)) |
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// Close the client. This should delete the lockfile. |
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closer.Close() |
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// Check that the lockfile is always deleted |
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if !c.lockFileDisabled { |
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_, err = os.Stat(locker.path) |
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require.True(t, os.IsNotExist(err), "lockfile was not deleted") |
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} |
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}) |
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} |
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}
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