Ophestra
b667fea1cb
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This exposes store operations safe for direct access, and enables #19 to be implemented in internal/outcome. Signed-off-by: Ophestra <cat@gensokyo.uk>
271 lines
8.1 KiB
Go
271 lines
8.1 KiB
Go
package store_test
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import (
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"errors"
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"io"
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"iter"
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"os"
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"reflect"
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"slices"
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"strings"
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"syscall"
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"testing"
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_ "unsafe"
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"hakurei.app/container/check"
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"hakurei.app/container/stub"
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"hakurei.app/hst"
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"hakurei.app/internal/store"
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)
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//go:linkname newTemplateState hakurei.app/internal/store.newTemplateState
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func newTemplateState() *hst.State
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//go:linkname entryDecode hakurei.app/internal/store.entryDecode
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func entryDecode(r io.Reader, p *hst.State) (hst.Enablement, error)
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//go:linkname newHandle hakurei.app/internal/store.newHandle
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func newHandle(base *check.Absolute, identity int) *store.Handle
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//go:linkname open hakurei.app/internal/store.(*EntryHandle).open
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func open(eh *store.EntryHandle, flag int, perm os.FileMode) (*os.File, error)
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func TestStateEntryHandle(t *testing.T) {
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t.Parallel()
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t.Run("lockout", func(t *testing.T) {
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t.Parallel()
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wantErr := func() error { return stub.UniqueError(0) }
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eh := store.EntryHandle{DecodeErr: wantErr(), Pathname: check.MustAbs("/proc/nonexistent")}
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if _, err := open(&eh, -1, 0); !reflect.DeepEqual(err, wantErr()) {
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t.Errorf("open: error = %v, want %v", err, wantErr())
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}
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if err := eh.Destroy(); !reflect.DeepEqual(err, wantErr()) {
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t.Errorf("destroy: error = %v, want %v", err, wantErr())
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}
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if err := eh.Save(nil); !reflect.DeepEqual(err, wantErr()) {
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t.Errorf("save: error = %v, want %v", err, wantErr())
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}
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if _, err := eh.Load(nil); !reflect.DeepEqual(err, wantErr()) {
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t.Errorf("load: error = %v, want %v", err, wantErr())
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}
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})
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t.Run("od", func(t *testing.T) {
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t.Parallel()
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{
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eh := store.EntryHandle{Pathname: check.MustAbs(t.TempDir()).Append("entry")}
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if f, err := open(&eh, os.O_CREATE|syscall.O_EXCL, 0); err != nil {
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t.Fatalf("open: error = %v", err)
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} else if err = f.Close(); err != nil {
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t.Errorf("Close: error = %v", err)
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}
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if err := eh.Destroy(); err != nil {
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t.Fatalf("destroy: error = %v", err)
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}
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}
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t.Run("nonexistent", func(t *testing.T) {
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t.Parallel()
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eh := store.EntryHandle{Pathname: check.MustAbs("/proc/nonexistent")}
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wantErrOpen := &hst.AppError{Step: "open state entry",
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Err: &os.PathError{Op: "open", Path: "/proc/nonexistent", Err: syscall.ENOENT}}
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if _, err := open(&eh, os.O_CREATE|syscall.O_EXCL, 0); !reflect.DeepEqual(err, wantErrOpen) {
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t.Errorf("open: error = %#v, want %#v", err, wantErrOpen)
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}
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wantErrDestroy := &hst.AppError{Step: "destroy state entry",
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Err: &os.PathError{Op: "remove", Path: "/proc/nonexistent", Err: syscall.ENOENT}}
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if err := eh.Destroy(); !reflect.DeepEqual(err, wantErrDestroy) {
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t.Errorf("destroy: error = %#v, want %#v", err, wantErrDestroy)
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}
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})
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})
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t.Run("saveload", func(t *testing.T) {
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t.Parallel()
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eh := store.EntryHandle{Pathname: check.MustAbs(t.TempDir()).Append("entry"),
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ID: newTemplateState().ID}
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if err := eh.Save(newTemplateState()); err != nil {
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t.Fatalf("save: error = %v", err)
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}
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t.Run("validate", func(t *testing.T) {
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t.Parallel()
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t.Run("internal", func(t *testing.T) {
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t.Parallel()
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var got hst.State
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if f, err := os.Open(eh.Pathname.String()); err != nil {
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t.Fatal(err.Error())
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} else if _, err = entryDecode(f, &got); err != nil {
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t.Fatalf("entryDecode: error = %v", err)
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} else if err = f.Close(); err != nil {
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t.Fatal(f.Close())
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}
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if want := newTemplateState(); !reflect.DeepEqual(&got, want) {
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t.Errorf("entryDecode: %#v, want %#v", &got, want)
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}
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})
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t.Run("load header only", func(t *testing.T) {
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t.Parallel()
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if et, err := eh.Load(nil); err != nil {
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t.Fatalf("load: error = %v", err)
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} else if want := newTemplateState().Enablements.Unwrap(); et != want {
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t.Errorf("load: et = %x, want %x", et, want)
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}
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})
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t.Run("load", func(t *testing.T) {
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t.Parallel()
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var got hst.State
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if _, err := eh.Load(&got); err != nil {
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t.Fatalf("load: error = %v", err)
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} else if want := newTemplateState(); !reflect.DeepEqual(&got, want) {
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t.Errorf("load: %#v, want %#v", &got, want)
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}
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})
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t.Run("load inconsistent", func(t *testing.T) {
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t.Parallel()
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wantErr := &hst.AppError{Step: "validate state identifier", Err: os.ErrInvalid,
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Msg: "state entry 00000000000000000000000000000000 has unexpected id aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"}
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ehi := store.EntryHandle{Pathname: eh.Pathname}
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if _, err := ehi.Load(new(hst.State)); !reflect.DeepEqual(err, wantErr) {
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t.Errorf("load: error = %#v, want %#v", err, wantErr)
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}
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})
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})
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})
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}
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func TestStoreHandle(t *testing.T) {
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t.Parallel()
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testCases := []struct {
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name string
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ents [2][]string
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want func(newEh func(err error, name string) *store.EntryHandle) []*store.EntryHandle
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ext func(t *testing.T, entries iter.Seq[*store.EntryHandle], n int)
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}{
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{"errors", [2][]string{{
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"e81eb203b4190ac5c3842ef44d429945",
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"lock",
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"f0-invalid",
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}, {
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"f1-directory",
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}}, func(newEh func(err error, name string) *store.EntryHandle) []*store.EntryHandle {
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return []*store.EntryHandle{
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newEh(nil, "e81eb203b4190ac5c3842ef44d429945"),
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newEh(&hst.AppError{Step: "decode store segment entry",
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Err: hst.IdentifierDecodeError{Err: hst.ErrIdentifierLength}}, "f0-invalid"),
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newEh(&hst.AppError{Step: "read store segment entries",
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Err: errors.New(`unexpected directory "f1-directory" in store`)}, "f1-directory"),
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}
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}, nil},
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{"success", [2][]string{{
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"e81eb203b4190ac5c3842ef44d429945",
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"7958cfbb9272d9cf9cfd61c85afa13f1",
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"d0b5f7446dd5bd3424ff2f7ac9cace1e",
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"c8c8e2c4aea5c32fe47240ff8caa874e",
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"fa0d30b249d80f155a1f80ceddcc32f2",
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"lock",
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}}, func(newEh func(err error, name string) *store.EntryHandle) []*store.EntryHandle {
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return []*store.EntryHandle{
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newEh(nil, "7958cfbb9272d9cf9cfd61c85afa13f1"),
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newEh(nil, "c8c8e2c4aea5c32fe47240ff8caa874e"),
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newEh(nil, "d0b5f7446dd5bd3424ff2f7ac9cace1e"),
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newEh(nil, "e81eb203b4190ac5c3842ef44d429945"),
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newEh(nil, "fa0d30b249d80f155a1f80ceddcc32f2"),
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}
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}, func(t *testing.T, entries iter.Seq[*store.EntryHandle], n int) {
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if n != 5 {
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t.Fatalf("Entries: n = %d", n)
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}
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// check partial drain
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for range entries {
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break
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}
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}},
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}
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for _, tc := range testCases {
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t.Run(tc.name, func(t *testing.T) {
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t.Parallel()
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base := check.MustAbs(t.TempDir()).Append("store")
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segment := base.Append("9")
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if err := os.MkdirAll(segment.String(), 0700); err != nil {
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t.Fatal(err.Error())
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}
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createEntries(t, segment, tc.ents)
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var got []*store.EntryHandle
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if entries, n, err := newHandle(base, 9).Entries(); err != nil {
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t.Fatalf("Entries: error = %v", err)
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} else {
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got = slices.AppendSeq(make([]*store.EntryHandle, 0, n), entries)
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if tc.ext != nil {
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tc.ext(t, entries, n)
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}
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}
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slices.SortFunc(got, func(a, b *store.EntryHandle) int { return strings.Compare(a.Pathname.String(), b.Pathname.String()) })
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want := tc.want(func(err error, name string) *store.EntryHandle {
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eh := store.EntryHandle{DecodeErr: err, Pathname: segment.Append(name)}
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if err == nil {
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if err = eh.UnmarshalText([]byte(name)); err != nil {
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t.Fatalf("UnmarshalText: error = %v", err)
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}
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}
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return &eh
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})
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if !reflect.DeepEqual(got, want) {
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t.Errorf("Entries: %q, want %q", got, want)
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}
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})
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}
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t.Run("nonexistent", func(t *testing.T) {
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var wantErr = &hst.AppError{Step: "read store segment entries", Err: &os.PathError{
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Op: "open",
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Path: "/proc/nonexistent",
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Err: syscall.ENOENT,
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}}
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if _, _, err := (&store.Handle{
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Identity: -0xbad,
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Path: check.MustAbs("/proc/nonexistent"),
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}).Entries(); !reflect.DeepEqual(err, wantErr) {
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t.Fatalf("Entries: error = %#v, want %#v", err, wantErr)
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}
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})
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}
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// createEntries creates file and directory entries in the specified prefix.
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func createEntries(t *testing.T, prefix *check.Absolute, ents [2][]string) {
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for _, s := range ents[0] {
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if f, err := os.OpenFile(prefix.Append(s).String(), os.O_CREATE|os.O_EXCL, 0600); err != nil {
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t.Fatal(err.Error())
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} else if err = f.Close(); err != nil {
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t.Fatal(err.Error())
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}
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}
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for _, s := range ents[1] {
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if err := os.Mkdir(prefix.Append(s).String(), 0700); err != nil {
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t.Fatal(err.Error())
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}
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}
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}
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