fix(api): align tombstoned DID compatibility with plc.directory

1 files changed, 50 insertions, 0 deletions

diff --git a/internal/api/plc_compatibility_test.go b/internal/api/plc_compatibility_test.go
index 45428d8..a669f0c 100644
--- a/internal/api/plc_compatibility_test.go
+++ b/internal/api/plc_compatibility_test.go
@@ -302,6 +302,56 @@ func TestPLCCompatibilityNotFoundUsesPLCErrorShape(t *testing.T) {
 	}
 }
 
+func TestPLCCompatibilityTombstonedDIDReturnsNotAvailable404(t *testing.T) {
+	ts, store, _, cleanup := newCompatibilityServer(t)
+	defer cleanup()
+
+	const tombDID = "did:plc:tombstone-test"
+
+	if err := store.PutState(types.StateV1{
+		DID:          tombDID,
+		ChainTipHash: "bafy-tomb-tip",
+		DIDDocument:  []byte(`{"id":"did:plc:tombstone-test","deactivated":true}`),
+	}); err != nil {
+		t.Fatalf("put tombstoned state: %v", err)
+	}
+
+	check := func(path string) {
+		t.Helper()
+
+		resp, err := http.Get(ts.URL + path)
+		if err != nil {
+			t.Fatalf("get %s: %v", path, err)
+		}
+		defer resp.Body.Close()
+
+		if resp.StatusCode != http.StatusNotFound {
+			t.Fatalf("%s status: got %d want 404", path, resp.StatusCode)
+		}
+
+		if got := resp.Header.Get("Content-Type"); got != "application/json; charset=utf-8" {
+			t.Fatalf("%s content-type mismatch: got %q want %q", path, got, "application/json; charset=utf-8")
+		}
+
+		var body map[string]any
+		if err := json.NewDecoder(resp.Body).Decode(&body); err != nil {
+			t.Fatalf("%s decode body: %v", path, err)
+		}
+
+		if len(body) != 1 {
+			t.Fatalf("%s expected single message field, got: %v", path, body)
+		}
+
+		want := "DID not available: " + tombDID
+		if got, _ := body["message"].(string); got != want {
+			t.Fatalf("%s message mismatch: got %q want %q", path, got, want)
+		}
+	}
+
+	check("/" + tombDID)
+	check("/" + tombDID + "/data")
+}
+
 func newCompatibilityServer(t *testing.T) (*httptest.Server, *storage.PebbleStore, []types.ExportRecord, func()) {
 	t.Helper()