Privatae
31 lines
1014 B
Go
31 lines
1014 B
Go
//go:build linux
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package main
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import (
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"path/filepath"
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"testing"
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)
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// The REAL enumerator's failure path, not the seam above it: an unreadable
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// /proc must come back as an error. The bug this plane had was an empty map
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// with a nil error here, which the heartbeat sent as "looked, nothing there"
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// and the host read as a kill order carried out. scanProcessesFn is stubbed
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// by every other test, so without this one the guard stops at the seam.
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func TestTheLinuxWalkFailsLoudlyWhenProcIsUnreadable(t *testing.T) {
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prev := procRoot
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t.Cleanup(func() { procRoot = prev })
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procRoot = filepath.Join(t.TempDir(), "no-proc-here")
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m, err := scanProcesses()
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if err == nil {
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t.Fatalf("an unreadable %s returned %d processes and no error — an empty map with a nil error is the bug", procRoot, len(m))
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}
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if m != nil {
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t.Fatalf("a failed walk must return no map, got %v", m)
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}
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procRoot = prev
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if _, err := scanProcesses(); err != nil {
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t.Fatalf("the real /proc walk failed on this box: %v", err)
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}
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}
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