clawbot
35e771e2b6
With a fake free-space probe, an empty cache with 4 GiB free gets a 3 GiB default, and the same cache once it holds those 3 GiB, with 1 GiB left free, must keep 3 GiB. The default is still 75% of the free space alone, so the second check fails: this is the bug in #184. computeDefaultMaxBytes only calls the config's existing computation so the test compiles. Model: opus-5-5
53 lines
1.6 KiB
Go
53 lines
1.6 KiB
Go
package imgcache
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import (
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"testing"
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)
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// TestComputeDefaultMaxBytesCountsWhatTheCacheHolds verifies that the
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// default limit is 75% of the free space plus what the cache already
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// holds, so a cache filled to its limit keeps that limit across a
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// restart instead of shrinking to 75% of the space left free.
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func TestComputeDefaultMaxBytesCountsWhatTheCacheHolds(t *testing.T) {
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t.Parallel()
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cache, _ := newEvictionTestCache(t, 1<<30)
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// Empty cache, 4 GiB free -> 3 GiB default.
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got, err := cache.computeDefaultMaxBytes(t.Context(),
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func(string) (uint64, error) { return 4294967296, nil })
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if err != nil {
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t.Fatalf("computeDefaultMaxBytes returned error: %v", err)
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}
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t.Logf("default for an empty cache with 4 GiB free: %d", got)
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if got != 3221225472 {
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t.Errorf("default for an empty cache = %d, want 3221225472 (75%% of 4 GiB)",
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got)
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}
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// The cache now holds those 3 GiB, which leaves 1 GiB free.
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_, err = cache.db.ExecContext(t.Context(),
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`INSERT INTO variant_content (cache_key, size_bytes, content_type)
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VALUES (?, ?, ?)`,
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string(testVariantKeyOne), 3221225472, testContentTypeWebP,
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)
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if err != nil {
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t.Fatalf("failed to insert variant accounting row: %v", err)
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}
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got, err = cache.computeDefaultMaxBytes(t.Context(),
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func(string) (uint64, error) { return 1073741824, nil })
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if err != nil {
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t.Fatalf("computeDefaultMaxBytes returned error: %v", err)
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}
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t.Logf("default for a cache holding 3 GiB with 1 GiB free: %d", got)
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if got != 3221225472 {
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t.Errorf("default for a cache holding 3 GiB with 1 GiB free = %d, "+
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"want 3221225472 (75%% of 1 GiB + 3 GiB)", got)
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}
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}
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