prometheus/util/testutil/storage.go

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// Copyright 2017 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package testutil
import (
"io/ioutil"
"os"
"time"
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"github.com/prometheus/common/log"
"github.com/prometheus/prometheus/storage"
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"github.com/prometheus/prometheus/storage/tsdb"
)
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// NewStorage returns a new storage for testing purposes
// that removes all associated files on closing.
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func NewStorage(t T) storage.Storage {
dir, err := ioutil.TempDir("", "test_storage")
if err != nil {
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t.Fatalf("Opening test dir failed: %s", err)
}
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log.With("dir", dir).Debugln("opening test storage")
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// Tests just load data for a series sequentially. Thus we
// need a long appendable window.
db, err := tsdb.Open(dir, nil, &tsdb.Options{
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MinBlockDuration: 24 * time.Hour,
MaxBlockDuration: 24 * time.Hour,
})
if err != nil {
t.Fatalf("Opening test storage failed: %s", err)
}
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return testStorage{Storage: db, dir: dir}
}
type testStorage struct {
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storage.Storage
dir string
}
func (s testStorage) Close() error {
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log.With("dir", s.dir).Debugln("closing test storage")
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if err := s.Storage.Close(); err != nil {
return err
}
return os.RemoveAll(s.dir)
}