60 lines
1.6 KiB
Go
60 lines
1.6 KiB
Go
// 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 storage
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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 TestListSeriesIterator(t *testing.T) {
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it := NewListSeriesIterator(samples{sample{0, 0}, sample{1, 1}, sample{1, 1.5}, sample{2, 2}, sample{3, 3}})
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// Seek to the first sample with ts=1.
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require.True(t, it.Seek(1))
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ts, v := it.At()
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require.Equal(t, int64(1), ts)
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require.Equal(t, 1., v)
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// Seek one further, next sample still has ts=1.
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require.True(t, it.Next())
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ts, v = it.At()
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require.Equal(t, int64(1), ts)
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require.Equal(t, 1.5, v)
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// Seek again to 1 and make sure we stay where we are.
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require.True(t, it.Seek(1))
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ts, v = it.At()
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require.Equal(t, int64(1), ts)
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require.Equal(t, 1.5, v)
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// Another seek.
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require.True(t, it.Seek(3))
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ts, v = it.At()
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require.Equal(t, int64(3), ts)
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require.Equal(t, 3., v)
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// And we don't go back.
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require.True(t, it.Seek(2))
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ts, v = it.At()
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require.Equal(t, int64(3), ts)
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require.Equal(t, 3., v)
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// Seek beyond the end.
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require.False(t, it.Seek(5))
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// And we don't go back. (This exposes issue #10027.)
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require.False(t, it.Seek(2))
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}
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