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ed82a535e5
the threshold. Prior to this commit, if a cache value was reduced to a value that fell below the threshold, the operation would be ignored and the cached value would remain at the old, higher value. This commit also fixes logic which reduces a cached value within the framework of uint64 values by subracting the absolute value of the negative value (since adding a negitive doesn't work with unsigned integers).
56 lines
1.7 KiB
Go
56 lines
1.7 KiB
Go
// Copyright 2017 Pilosa Corp.
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//
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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 pilosa_test
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import (
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"testing"
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"github.com/pilosa/pilosa/v2"
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)
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// Ensure cache stays constrained to its configured size.
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func TestCache_Rank_Size(t *testing.T) {
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cacheSize := uint32(3)
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cache := pilosa.NewRankCache(cacheSize)
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for i := 1; i < int(2*cacheSize); i++ {
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cache.Add(uint64(i), 3)
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}
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cache.Recalculate()
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if cache.Len() != int(cacheSize) {
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t.Fatalf("unexpected cache Size: %d!=%d expected\n", cache.Len(), cacheSize)
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}
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}
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// Ensure cache entries set below threshold are handled appropriately.
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func TestCache_Rank_Threshold(t *testing.T) {
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cacheSize := uint32(5)
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cache := pilosa.NewRankCache(cacheSize)
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for i := 1; i < int(2*cacheSize); i++ {
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cache.Add(uint64(i), 3)
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}
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// Set the cache value for rows 4 and 5 to a number below the threshold
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// value (which is 3), and ensure that they gets zeroed out.
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cache.Add(4, 1)
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cache.BulkAdd(5, 1)
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cache.Recalculate()
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if cache.Get(4) != 0 {
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t.Fatalf("unexpected cache value after Add: %d!=%d expected\n", cache.Get(4), 0)
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}
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if cache.Get(5) != 0 {
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t.Fatalf("unexpected cache value after BulkAdd: %d!=%d expected\n", cache.Get(5), 0)
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}
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}
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