mirror of
https://github.com/prometheus/prometheus.git
synced 2024-12-26 06:04:05 -08:00
132 lines
3.4 KiB
Go
132 lines
3.4 KiB
Go
// Copyright 2017 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 tsdb
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import (
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"io/ioutil"
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"os"
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"testing"
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"github.com/prometheus/tsdb/labels"
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"github.com/stretchr/testify/require"
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)
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// Convert a SeriesSet into a form useable with reflect.DeepEqual.
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func readSeriesSet(ss SeriesSet) (map[string][]sample, error) {
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result := map[string][]sample{}
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for ss.Next() {
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series := ss.At()
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samples := []sample{}
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it := series.Iterator()
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for it.Next() {
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t, v := it.At()
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samples = append(samples, sample{t: t, v: v})
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}
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name := series.Labels().String()
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result[name] = samples
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if err := ss.Err(); err != nil {
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return nil, err
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}
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}
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return result, nil
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}
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func TestDataAvailableOnlyAfterCommit(t *testing.T) {
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tmpdir, _ := ioutil.TempDir("", "test")
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defer os.RemoveAll(tmpdir)
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db, err := Open(tmpdir, nil, nil, nil)
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require.NoError(t, err)
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defer db.Close()
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app := db.Appender()
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_, err = app.Add(labels.FromStrings("foo", "bar"), 0, 0)
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require.NoError(t, err)
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querier := db.Querier(0, 1)
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defer querier.Close()
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seriesSet, err := readSeriesSet(querier.Select(labels.NewEqualMatcher("foo", "bar")))
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require.NoError(t, err)
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require.Equal(t, seriesSet, map[string][]sample{})
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err = app.Commit()
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require.NoError(t, err)
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querier = db.Querier(0, 1)
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defer querier.Close()
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seriesSet, err = readSeriesSet(querier.Select(labels.NewEqualMatcher("foo", "bar")))
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require.NoError(t, err)
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require.Equal(t, seriesSet, map[string][]sample{`{foo="bar"}`: []sample{{t: 0, v: 0}}})
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}
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func TestDataNotAvailableAfterRollback(t *testing.T) {
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tmpdir, _ := ioutil.TempDir("", "test")
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defer os.RemoveAll(tmpdir)
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db, err := Open(tmpdir, nil, nil, nil)
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if err != nil {
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t.Fatalf("Error opening database: %q", err)
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}
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defer db.Close()
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app := db.Appender()
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_, err = app.Add(labels.FromStrings("foo", "bar"), 0, 0)
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require.NoError(t, err)
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err = app.Rollback()
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require.NoError(t, err)
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querier := db.Querier(0, 1)
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defer querier.Close()
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seriesSet, err := readSeriesSet(querier.Select(labels.NewEqualMatcher("foo", "bar")))
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require.NoError(t, err)
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require.Equal(t, seriesSet, map[string][]sample{})
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}
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func TestDBAppenderAddRef(t *testing.T) {
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tmpdir, _ := ioutil.TempDir("", "test")
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defer os.RemoveAll(tmpdir)
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db, err := Open(tmpdir, nil, nil, nil)
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require.NoError(t, err)
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defer db.Close()
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app := db.Appender()
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defer app.Rollback()
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ref, err := app.Add(labels.FromStrings("a", "b"), 0, 0)
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require.NoError(t, err)
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// Head sequence number should be in 3rd MSB and be greater than 0.
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gen := (ref << 16) >> 56
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require.True(t, gen > 1)
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// Reference must be valid to add another sample.
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err = app.AddFast(ref, 1, 1)
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require.NoError(t, err)
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// AddFast for the same timestamp must fail if the generation in the reference
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// doesn't add up.
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refBad := ref | ((gen + 1) << 4)
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err = app.AddFast(refBad, 1, 1)
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require.Error(t, err)
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require.Equal(t, 2, app.(*dbAppender).samples)
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}
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