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61 lines
1.6 KiB
61 lines
1.6 KiB
// Copyright 2020 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 chunkenc |
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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 TestBstreamReader(t *testing.T) { |
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// Write to the bit stream. |
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w := bstream{} |
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for _, bit := range []bit{true, false} { |
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w.writeBit(bit) |
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} |
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for nbits := 1; nbits <= 64; nbits++ { |
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w.writeBits(uint64(nbits), nbits) |
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} |
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for v := 1; v < 10000; v += 123 { |
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w.writeBits(uint64(v), 29) |
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} |
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// Read back. |
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r := newBReader(w.bytes()) |
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for _, bit := range []bit{true, false} { |
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v, err := r.readBitFast() |
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if err != nil { |
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v, err = r.readBit() |
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} |
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require.NoError(t, err) |
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require.Equal(t, bit, v) |
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} |
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for nbits := uint8(1); nbits <= 64; nbits++ { |
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v, err := r.readBitsFast(nbits) |
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if err != nil { |
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v, err = r.readBits(nbits) |
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} |
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require.NoError(t, err) |
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require.Equal(t, uint64(nbits), v, "nbits=%d", nbits) |
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} |
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for v := 1; v < 10000; v += 123 { |
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actual, err := r.readBitsFast(29) |
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if err != nil { |
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actual, err = r.readBits(29) |
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} |
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require.NoError(t, err) |
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require.Equal(t, uint64(v), actual, "v=%d", v) |
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} |
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}
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