test: read the WebRTC transport's source as a set of files

Source-reading tests take their text from node_source (node) and node_tree
(hub): webrtc_server.py plus anything under transport/webrtc/, so a check
for something's absence keeps reading the code it guards if that code moves.
test_node_source_scope holds the boundary.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 3 insertions, 6 deletions

diff --git a/packages/meshbay-node/tests/test_roster_pairing.py b/packages/meshbay-node/tests/test_roster_pairing.py
index 91191c1..038f12c 100644
--- a/packages/meshbay-node/tests/test_roster_pairing.py
+++ b/packages/meshbay-node/tests/test_roster_pairing.py
@@ -23,6 +23,7 @@ from meshbay_common.join import ROLE_MEMBER, ROLE_OPERATOR, join_transcript
 from meshbay_node.indexer.group_index import GroupIndex
 from meshbay_node.roster import Roster, hash_code, normalize_code
 from meshbay_node.transport.webrtc_server import WebRTCPeerSession
+from node_source import session_method, webrtc_source
 
 from conftest import one_root
 
@@ -568,9 +569,7 @@ def test_challenge_carries_node_pk_in_source():
     Belt and braces for the above: the field must be in the message the node
     builds, whatever the surrounding handshake does.
     """
-    source = (Path(__file__).parent.parent
-              / "src" / "meshbay_node" / "transport"
-              / "webrtc_server.py").read_text(encoding="utf-8")
+    source = webrtc_source()
     challenge = source[source.find("MNP.HANDSHAKE_CHALLENGE,"):]
     challenge = challenge[:challenge.find("})")]
     assert "node_pk" in challenge, (
@@ -899,9 +898,7 @@ def test_admin_authority_is_never_fetched_from_the_hub():
     """
     src = Path(__file__).parent.parent / "src" / "meshbay_node"
 
-    verifier = (src / "transport" / "webrtc_server.py").read_text(encoding="utf-8")
-    body = verifier[verifier.index("async def _verify_admin_sig"):]
-    body = body[:body.index("\n    def ", 1)]
+    body = session_method("_verify_admin_sig")
     assert "operator_pks" in body, "the roster is where authority comes from"
     # Past the docstring: it names what was removed on purpose, so a reader knows
     # not to put it back. What must not reappear is code.