61 lines
2.0 KiB
Go
61 lines
2.0 KiB
Go
// Copyright 2023 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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"testing"
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"github.com/stretchr/testify/require"
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)
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func TestOOOIsolation(t *testing.T) {
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i := newOOOIsolation()
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// Empty state shouldn't have any open reads.
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require.False(t, i.HasOpenReadsAtOrBefore(0))
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require.False(t, i.HasOpenReadsAtOrBefore(1))
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require.False(t, i.HasOpenReadsAtOrBefore(2))
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require.False(t, i.HasOpenReadsAtOrBefore(3))
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// Add a read.
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read1 := i.TrackReadAfter(1)
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require.False(t, i.HasOpenReadsAtOrBefore(0))
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require.False(t, i.HasOpenReadsAtOrBefore(1))
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require.True(t, i.HasOpenReadsAtOrBefore(2))
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// Add another overlapping read.
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read2 := i.TrackReadAfter(0)
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require.False(t, i.HasOpenReadsAtOrBefore(0))
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require.True(t, i.HasOpenReadsAtOrBefore(1))
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require.True(t, i.HasOpenReadsAtOrBefore(2))
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// Close the second read, should now only report open reads for the first read's ref.
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read2.Close()
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require.False(t, i.HasOpenReadsAtOrBefore(0))
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require.False(t, i.HasOpenReadsAtOrBefore(1))
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require.True(t, i.HasOpenReadsAtOrBefore(2))
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// Close the second read again: this should do nothing and ensures we can safely call Close() multiple times.
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read2.Close()
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require.False(t, i.HasOpenReadsAtOrBefore(0))
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require.False(t, i.HasOpenReadsAtOrBefore(1))
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require.True(t, i.HasOpenReadsAtOrBefore(2))
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// Closing the first read should indicate no further open reads.
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read1.Close()
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require.False(t, i.HasOpenReadsAtOrBefore(0))
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require.False(t, i.HasOpenReadsAtOrBefore(1))
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require.False(t, i.HasOpenReadsAtOrBefore(2))
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}
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