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test(brainfs): per-caller in-brain symlink targets for slices 1-3 (#171) (#172)
Co-authored-by: Mathias <mthbqv@gmail.com>
2026-10-05 19:36:31 +00:00

53 lines
2.0 KiB
Go

package api_test
import (
"os"
"path/filepath"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/mathiasbq/hyperguild/ingestion/internal/api"
"github.com/mathiasbq/hyperguild/ingestion/internal/brainfs/brainfstest"
)
// hyperguild#157 slice 2: ReadNote (brain_get, read-after-write) read by
// path; it now reads through brainfs.
func TestReadNoteRefusesSymlinksAndSurvivesSwapRaces(t *testing.T) {
brain := t.TempDir()
facts := filepath.Join(brain, "wiki", "w", "facts")
require.NoError(t, os.MkdirAll(facts, 0o755))
require.NoError(t, os.Symlink(brainfstest.Outside(t), filepath.Join(facts, "leak.md")))
_, body, _, err := api.ReadNote(brain, "wiki/w/facts/leak.md")
assert.Error(t, err)
assert.NotContains(t, body, brainfstest.Sentinel)
// A link to a file elsewhere in the brain: os.Root allows it, only the
// regular-file check refuses it (hyperguild#171).
brainfstest.WriteSentinelAt(t, filepath.Join(brain, "raw", "s.md"))
require.NoError(t, os.Symlink(filepath.Join("..", "..", "..", "raw", "s.md"), filepath.Join(facts, "inlink.md")))
_, body, _, err = api.ReadNote(brain, "wiki/w/facts/inlink.md")
assert.Error(t, err)
assert.NotContains(t, body, brainfstest.Sentinel)
p := filepath.Join(facts, "r.md")
require.NoError(t, os.WriteFile(p, []byte("---\nx: y\n---\ninside"), 0o644))
fm, body, _, err := api.ReadNote(brain, "wiki/w/facts/r.md")
require.NoError(t, err)
assert.Equal(t, "y", fm["x"])
assert.Contains(t, body, "inside")
read := func() string {
fm, body, _, _ := api.ReadNote(brain, "wiki/w/facts/r.md")
s := body
for k, v := range fm {
s += k + v
}
return s
}
brainfstest.AssertNoLeak(t, p, "---\nx: y\n---\ninside", 1500*time.Millisecond, read)
inBrain := brainfstest.WriteSentinelAt(t, filepath.Join(brain, "raw", "s.md"))
brainfstest.AssertNoLeakFrom(t, p, "---\nx: y\n---\ninside", inBrain, 1500*time.Millisecond, read)
brainfstest.AssertNoHang(t, p, "---\nx: y\n---\ninside", 1500*time.Millisecond, 6*time.Second, func() { _ = read() })
}