1 files changed, 245 insertions, 0 deletions
diff --git a/cli/internal/cache/cache_http_test.go b/cli/internal/cache/cache_http_test.go
new file mode 100644
index 0000000..d187931
--- /dev/null
+++ b/cli/internal/cache/cache_http_test.go
@@ -0,0 +1,245 @@
+package cache
+
+import (
+	"archive/tar"
+	"bytes"
+	"errors"
+	"net/http"
+	"testing"
+
+	"github.com/DataDog/zstd"
+
+	"github.com/vercel/turbo/cli/internal/fs"
+	"github.com/vercel/turbo/cli/internal/turbopath"
+	"github.com/vercel/turbo/cli/internal/util"
+	"gotest.tools/v3/assert"
+)
+
+type errorResp struct {
+	err error
+}
+
+func (sr *errorResp) PutArtifact(hash string, body []byte, duration int, tag string) error {
+	return sr.err
+}
+
+func (sr *errorResp) FetchArtifact(hash string) (*http.Response, error) {
+	return nil, sr.err
+}
+
+func (sr *errorResp) ArtifactExists(hash string) (*http.Response, error) {
+	return nil, sr.err
+}
+
+func (sr *errorResp) GetTeamID() string {
+	return ""
+}
+
+func TestRemoteCachingDisabled(t *testing.T) {
+	clientErr := &util.CacheDisabledError{
+		Status:  util.CachingStatusDisabled,
+		Message: "Remote Caching has been disabled for this team. A team owner can enable it here: $URL",
+	}
+	client := &errorResp{err: clientErr}
+	cache := &httpCache{
+		client:         client,
+		requestLimiter: make(limiter, 20),
+	}
+	cd := &util.CacheDisabledError{}
+	_, _, _, err := cache.Fetch("unused-target", "some-hash", []string{"unused", "outputs"})
+	if !errors.As(err, &cd) {
+		t.Errorf("cache.Fetch err got %v, want a CacheDisabled error", err)
+	}
+	if cd.Status != util.CachingStatusDisabled {
+		t.Errorf("CacheDisabled.Status got %v, want %v", cd.Status, util.CachingStatusDisabled)
+	}
+}
+
+func makeValidTar(t *testing.T) *bytes.Buffer {
+	// <repoRoot>
+	//   my-pkg/
+	//     some-file
+	//     link-to-extra-file -> ../extra-file
+	//     broken-link -> ../../global-dep
+	//   extra-file
+
+	t.Helper()
+	buf := &bytes.Buffer{}
+	zw := zstd.NewWriter(buf)
+	defer func() {
+		if err := zw.Close(); err != nil {
+			t.Fatalf("failed to close gzip: %v", err)
+		}
+	}()
+	tw := tar.NewWriter(zw)
+	defer func() {
+		if err := tw.Close(); err != nil {
+			t.Fatalf("failed to close tar: %v", err)
+		}
+	}()
+
+	// my-pkg
+	h := &tar.Header{
+		Name:     "my-pkg/",
+		Mode:     int64(0644),
+		Typeflag: tar.TypeDir,
+	}
+	if err := tw.WriteHeader(h); err != nil {
+		t.Fatalf("failed to write header: %v", err)
+	}
+	// my-pkg/some-file
+	contents := []byte("some-file-contents")
+	h = &tar.Header{
+		Name:     "my-pkg/some-file",
+		Mode:     int64(0644),
+		Typeflag: tar.TypeReg,
+		Size:     int64(len(contents)),
+	}
+	if err := tw.WriteHeader(h); err != nil {
+		t.Fatalf("failed to write header: %v", err)
+	}
+	if _, err := tw.Write(contents); err != nil {
+		t.Fatalf("failed to write file: %v", err)
+	}
+	// my-pkg/link-to-extra-file
+	h = &tar.Header{
+		Name:     "my-pkg/link-to-extra-file",
+		Mode:     int64(0644),
+		Typeflag: tar.TypeSymlink,
+		Linkname: "../extra-file",
+	}
+	if err := tw.WriteHeader(h); err != nil {
+		t.Fatalf("failed to write header: %v", err)
+	}
+	// my-pkg/broken-link
+	h = &tar.Header{
+		Name:     "my-pkg/broken-link",
+		Mode:     int64(0644),
+		Typeflag: tar.TypeSymlink,
+		Linkname: "../../global-dep",
+	}
+	if err := tw.WriteHeader(h); err != nil {
+		t.Fatalf("failed to write header: %v", err)
+	}
+	// extra-file
+	contents = []byte("extra-file-contents")
+	h = &tar.Header{
+		Name:     "extra-file",
+		Mode:     int64(0644),
+		Typeflag: tar.TypeReg,
+		Size:     int64(len(contents)),
+	}
+	if err := tw.WriteHeader(h); err != nil {
+		t.Fatalf("failed to write header: %v", err)
+	}
+	if _, err := tw.Write(contents); err != nil {
+		t.Fatalf("failed to write file: %v", err)
+	}
+
+	return buf
+}
+
+func makeInvalidTar(t *testing.T) *bytes.Buffer {
+	// contains a single file that traverses out
+	// ../some-file
+
+	t.Helper()
+	buf := &bytes.Buffer{}
+	zw := zstd.NewWriter(buf)
+	defer func() {
+		if err := zw.Close(); err != nil {
+			t.Fatalf("failed to close gzip: %v", err)
+		}
+	}()
+	tw := tar.NewWriter(zw)
+	defer func() {
+		if err := tw.Close(); err != nil {
+			t.Fatalf("failed to close tar: %v", err)
+		}
+	}()
+
+	// my-pkg/some-file
+	contents := []byte("some-file-contents")
+	h := &tar.Header{
+		Name:     "../some-file",
+		Mode:     int64(0644),
+		Typeflag: tar.TypeReg,
+		Size:     int64(len(contents)),
+	}
+	if err := tw.WriteHeader(h); err != nil {
+		t.Fatalf("failed to write header: %v", err)
+	}
+	if _, err := tw.Write(contents); err != nil {
+		t.Fatalf("failed to write file: %v", err)
+	}
+	return buf
+}
+
+func TestRestoreTar(t *testing.T) {
+	root := fs.AbsoluteSystemPathFromUpstream(t.TempDir())
+
+	tar := makeValidTar(t)
+
+	expectedFiles := []turbopath.AnchoredSystemPath{
+		turbopath.AnchoredUnixPath("extra-file").ToSystemPath(),
+		turbopath.AnchoredUnixPath("my-pkg/").ToSystemPath(),
+		turbopath.AnchoredUnixPath("my-pkg/some-file").ToSystemPath(),
+		turbopath.AnchoredUnixPath("my-pkg/link-to-extra-file").ToSystemPath(),
+		turbopath.AnchoredUnixPath("my-pkg/broken-link").ToSystemPath(),
+	}
+	files, err := restoreTar(root, tar)
+	assert.NilError(t, err, "readTar")
+
+	expectedSet := make(util.Set)
+	for _, file := range expectedFiles {
+		expectedSet.Add(file.ToString())
+	}
+	gotSet := make(util.Set)
+	for _, file := range files {
+		gotSet.Add(file.ToString())
+	}
+	extraFiles := gotSet.Difference(expectedSet)
+	if extraFiles.Len() > 0 {
+		t.Errorf("got extra files: %v", extraFiles.UnsafeListOfStrings())
+	}
+	missingFiles := expectedSet.Difference(gotSet)
+	if missingFiles.Len() > 0 {
+		t.Errorf("missing expected files: %v", missingFiles.UnsafeListOfStrings())
+	}
+
+	// Verify file contents
+	extraFile := root.UntypedJoin("extra-file")
+	contents, err := extraFile.ReadFile()
+	assert.NilError(t, err, "ReadFile")
+	assert.DeepEqual(t, contents, []byte("extra-file-contents"))
+
+	someFile := root.UntypedJoin("my-pkg", "some-file")
+	contents, err = someFile.ReadFile()
+	assert.NilError(t, err, "ReadFile")
+	assert.DeepEqual(t, contents, []byte("some-file-contents"))
+}
+
+func TestRestoreInvalidTar(t *testing.T) {
+	root := fs.AbsoluteSystemPathFromUpstream(t.TempDir())
+	expectedContents := []byte("important-data")
+	someFile := root.UntypedJoin("some-file")
+	err := someFile.WriteFile(expectedContents, 0644)
+	assert.NilError(t, err, "WriteFile")
+
+	tar := makeInvalidTar(t)
+	// use a child directory so that blindly untarring will squash the file
+	// that we just wrote above.
+	repoRoot := root.UntypedJoin("repo")
+	_, err = restoreTar(repoRoot, tar)
+	if err == nil {
+		t.Error("expected error untarring invalid tar")
+	}
+
+	contents, err := someFile.ReadFile()
+	assert.NilError(t, err, "ReadFile")
+	assert.Equal(t, string(contents), string(expectedContents), "expected to not overwrite file")
+}
+
+// Note that testing Put will require mocking the filesystem and is not currently the most
+// interesting test. The current implementation directly returns the error from PutArtifact.
+// We should still add the test once feasible to avoid future breakage.