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Every backup writes vaultik-destination.txt at the destination root. While the local index holds snapshots stored there, a destination without it is not present: snapshot create refuses before writing, prune and snapshot purge fail, and snapshot list and snapshot remove act as for a destination that cannot be listed. snapshot create and snapshot remove check it first. remote nuke deletes the marker last. The file:// backend never creates its destination directory, which protects a directory on a removable volume, not a mount point. Tests back up into directories that exist; fixtures for a written destination carry the marker. Judgement call: the marker is rewritten on every backup. Deviation: for the complexity limit, two blocks moved, unchanged, into snapshotNamesToCreate and confirmRemoveSnapshot. Model: opus-5-5
76 lines
2.7 KiB
Go
76 lines
2.7 KiB
Go
package cli //nolint:testpackage // shares runEntry and the hermetic config helpers
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import (
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"context"
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"os"
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"path/filepath"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"sneak.berlin/go/vaultik/internal/database"
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"sneak.berlin/go/vaultik/internal/snapshot"
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)
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// Words and flags of `snapshot purge` used to build argument vectors
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// below.
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const (
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cmdPurge = "purge"
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flagOlderThan = "--older-than"
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flagForce = "--force"
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)
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// TestEntrySnapshotPurgeKeepsMetadataWhenLocalIndexDeleteFails makes
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// the local index refuse to delete an old snapshot and checks that
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// `snapshot purge` exits non-zero and leaves that snapshot's metadata on
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// the destination store. It used to log the error, delete the metadata
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// and exit 0.
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//
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// `snapshot create --prune` runs the same purge, but cannot be driven
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// this way: the refusal also breaks the backup's metadata export, which
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// deletes the other snapshots from its copy of the local index.
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//
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//nolint:paralleltest // replaces os.Args, os.Stdout, os.Stderr and the xdg globals
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func TestEntrySnapshotPurgeKeepsMetadataWhenLocalIndexDeleteFails(t *testing.T) {
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configPath := writeHermeticPruneConfig(t, false)
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dir := filepath.Dir(configPath)
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indexPath := filepath.Join(dir, "index.sqlite")
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// seedStaleSnapshotRecord writes an old snapshot to the local index
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// only; the manifest planted here puts it on the destination store
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// too, so the purge selects it rather than dropping it as stale.
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seedStaleSnapshotRecord(t, indexPath)
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// While the local index holds a snapshot, purge fails on a
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// destination without the marker a backup writes.
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require.NoError(t, os.WriteFile(
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filepath.Join(dir, "store", "vaultik-destination.txt"), nil, 0o600))
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manifestDir := filepath.Join(dir, "store", "metadata",
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snapshot.RemoteSnapshotKey(stalePruneSnapshotID))
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require.NoError(t, os.MkdirAll(manifestDir, 0o750))
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manifestPath := filepath.Join(manifestDir, "manifest.json.zst")
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require.NoError(t, os.WriteFile(manifestPath, []byte("stub"), 0o600))
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ctx := context.Background()
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db, err := database.New(ctx, indexPath)
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require.NoError(t, err)
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_, err = db.Conn().ExecContext(ctx, `
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CREATE TRIGGER refuse_snapshot_delete BEFORE DELETE ON snapshots
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BEGIN SELECT RAISE(ABORT, 'simulated index error'); END`)
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require.NoError(t, err)
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require.NoError(t, db.Close())
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code, _, stderr := runEntry(t, flagConfig, configPath,
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cmdSnapshot, cmdPurge, flagOlderThan, "30d", flagForce)
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assert.Equal(t, 1, code)
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assert.Contains(t, stderr, "simulated index error",
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"the purge must fail at the local-index delete")
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assert.FileExists(t, manifestPath,
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"the snapshot is still in the local index, so its metadata must stay")
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}
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