b542cc19ad
As a minimum, we would like to maintain generic garbage collection of containerd resources. This includes images, bundles, containers and arbitrary content. The included implementation is just a textbook toy that we can use to inform the requirements of gc. It implements a simple, stack-based tricolor algorithm. Nothing special. Mostly, this is to ensure we think about garbage collection from the start, rather than as an afterthought or follow on feature. Signed-off-by: Stephen J Day <stephen.day@docker.com>
31 lines
607 B
Go
31 lines
607 B
Go
package gc
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import (
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"reflect"
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"testing"
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)
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func TestTricolorBasic(t *testing.T) {
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roots := []string{"A", "C"}
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all := []string{"A", "B", "C", "D", "E", "F", "G"}
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refs := map[string][]string{
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"A": {"B"},
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"B": {"A"},
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"C": {"D", "F", "B"},
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"E": {"F", "G"},
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}
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unreachable := Tricolor(roots, all, lookup(refs))
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expected := []string{"E", "G"}
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if !reflect.DeepEqual(unreachable, expected) {
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t.Fatalf("incorrect unreachable set: %v != %v", unreachable, expected)
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}
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}
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func lookup(refs map[string][]string) func(id string) []string {
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return func(ref string) []string {
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return refs[ref]
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}
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}
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