feat(tvix/castore/protos): add more granular validation methods r/6799

Similar to cl/9715, this makes the validation checks more granular,
introducing a Validate on all *Node.

A check for symlink targets is added too.

Once merged, it can also be used from tvix/store/protos.

Change-Id: I0909a89fadcd74b74ef0c9a8a1f22658fccc83b0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9716
Reviewed-by: Connor Brewster <cbrewster@hey.com>
Tested-by: BuildkiteCI

1 files changed, 32 insertions, 5 deletions

diff --git a/tvix/castore/protos/castore_test.go b/tvix/castore/protos/castore_test.go
index 958d399d76..fda87a6cfb 100644
--- a/tvix/castore/protos/castore_test.go
+++ b/tvix/castore/protos/castore_test.go
@@ -122,7 +122,7 @@ func TestDirectoryValidate(t *testing.T) {
 				Symlinks: []*castorev1pb.SymlinkNode{},
 			}
 
-			assert.ErrorContains(t, d.Validate(), "invalid name")
+			assert.ErrorContains(t, d.Validate(), "invalid node name")
 		}
 		{
 			d := castorev1pb.Directory{
@@ -135,7 +135,7 @@ func TestDirectoryValidate(t *testing.T) {
 				Symlinks: []*castorev1pb.SymlinkNode{},
 			}
 
-			assert.ErrorContains(t, d.Validate(), "invalid name")
+			assert.ErrorContains(t, d.Validate(), "invalid node name")
 		}
 		{
 			d := castorev1pb.Directory{
@@ -149,7 +149,7 @@ func TestDirectoryValidate(t *testing.T) {
 				Symlinks: []*castorev1pb.SymlinkNode{},
 			}
 
-			assert.ErrorContains(t, d.Validate(), "invalid name")
+			assert.ErrorContains(t, d.Validate(), "invalid node name")
 		}
 		{
 			d := castorev1pb.Directory{
@@ -161,7 +161,7 @@ func TestDirectoryValidate(t *testing.T) {
 				}},
 			}
 
-			assert.ErrorContains(t, d.Validate(), "invalid name")
+			assert.ErrorContains(t, d.Validate(), "invalid node name")
 		}
 		{
 			d := castorev1pb.Directory{
@@ -173,7 +173,7 @@ func TestDirectoryValidate(t *testing.T) {
 				}},
 			}
 
-			assert.ErrorContains(t, d.Validate(), "invalid name")
+			assert.ErrorContains(t, d.Validate(), "invalid node name")
 		}
 	})
 
@@ -191,6 +191,33 @@ func TestDirectoryValidate(t *testing.T) {
 		assert.ErrorContains(t, d.Validate(), "invalid digest length")
 	})
 
+	t.Run("invalid symlink targets", func(t *testing.T) {
+		{
+			d := castorev1pb.Directory{
+				Directories: []*castorev1pb.DirectoryNode{},
+				Files:       []*castorev1pb.FileNode{},
+				Symlinks: []*castorev1pb.SymlinkNode{{
+					Name:   []byte("foo"),
+					Target: []byte{},
+				}},
+			}
+
+			assert.ErrorContains(t, d.Validate(), "invalid symlink target")
+		}
+		{
+			d := castorev1pb.Directory{
+				Directories: []*castorev1pb.DirectoryNode{},
+				Files:       []*castorev1pb.FileNode{},
+				Symlinks: []*castorev1pb.SymlinkNode{{
+					Name:   []byte("foo"),
+					Target: []byte{0x66, 0x6f, 0x6f, 0},
+				}},
+			}
+
+			assert.ErrorContains(t, d.Validate(), "invalid symlink target")
+		}
+	})
+
 	t.Run("sorting", func(t *testing.T) {
 		// "b" comes before "a", bad.
 		{