jschoubben
1f4ff20488
A trunk build alone writes them; any other step writes into an overlay that dies with it.
31 lines
1.0 KiB
Go
31 lines
1.0 KiB
Go
package buildstep
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import "testing"
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// The shared warm caches are read under a throwaway writable layer (novox/hq ADR 0448; issue 1309): a candidate's step
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// writes into them as a build does, and nothing it writes outlives it or reaches a later build; only a trunk build
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// writes them.
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func TestACandidatesStepWritesTheCachesOnlyIntoAThrowawayLayer(t *testing.T) {
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fixedSystem(t)
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iso := Isolation{Workspace: "/w", Caches: []string{"/var/cache/go-build", "/var/cache/npm"}}
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argv, err := iso.Command("go", "test")
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if err != nil {
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t.Fatal(err)
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}
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for _, c := range iso.Caches {
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if !holds(argv, "--overlay-src", c, "--tmp-overlay", c) {
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t.Errorf("the cache %s is not under a throwaway layer: %v", c, argv)
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}
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if holds(argv, "--bind", c, c) {
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t.Errorf("a candidate's step writes the cache %s: %v", c, argv)
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}
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}
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iso.WriteCaches = true
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argv, _ = iso.Command("go", "build")
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for _, c := range iso.Caches {
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if !holds(argv, "--bind", c, c) || holds(argv, "--tmp-overlay", c) {
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t.Errorf("a trunk build does not write the cache %s: %v", c, argv)
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}
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}
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}
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