Isolate channel admission test shim from contact frame fixture

test/fixtures/companion_channel_storage/checks.h

@@ -56,10 +56,10 @@ static void initializeContacts(ChannelFixture& f) {
   f.host.channels.push_back(defaults);
 }
 
-class MyMesh {
+class ChannelAdmission {
   DataStore* _store;
 public:
-  explicit MyMesh(DataStore& store) : _store(&store) {}
+  explicit ChannelAdmission(DataStore& store) : _store(&store) {}
   bool canMutateContacts() const;
 };
 #include "channel_admission_under_test.h"
@@ -99,7 +99,7 @@ static void channel_faults_do_not_poison_contacts() {
 #if defined(NRF52_PLATFORM)
     fail_channel_metadata = false;
 #endif
-    MyMesh admission(f.store);
+    ChannelAdmission admission(f.store);
     uint8_t path[64];
     if (fault == 8) {
       assert(f.store.hasIncompleteContactLoad() && !admission.canMutateContacts());

test/test_companion_channel_storage.py

@@ -62,7 +62,8 @@ static void* allocateChannelSnapshot(size_t size) {
             implementation += method(store, "bool DataStore::formatFileSystem()") + "\n"
         (work / "store_under_test.h").write_text(implementation)
         (work / "channel_admission_under_test.h").write_text(
-            method(mesh, "bool MyMesh::canMutateContacts() const"))
+            method(mesh, "bool MyMesh::canMutateContacts() const").replace(
+                "MyMesh::canMutateContacts", "ChannelAdmission::canMutateContacts", 1))
 
         fixture = (ROOT / ("test/fixtures/contact_cache/test_contact_cache.cpp" if is_cached
                            else "test/fixtures/companion_uncached_storage/test.cpp"))