beefy_finalizing_after_pallet_genesis

Signed-off-by: turuslan <turuslan.devbox@gmail.com>

test/core/consensus/beefy_test.cpp

@@ -467,3 +467,21 @@ TEST_F(Test, should_initialize_voter_at_custom_genesis) {
 
   // TODO(turuslan): #1651, multiple beefy genesis
 }
+
+TEST_F(Test, beefy_finalizing_after_pallet_genesis) {
+  genesis_ = 15;
+  makePeers(2);
+  // push 42 blocks including `AuthorityChange` digests every 10 blocks.
+  generate_blocks_and_sync(42, 10);
+  // GRANDPA finalize blocks leading up to BEEFY pallet genesis -> BEEFY should
+  // finalize nothing.
+  finalize_block_and_wait_for_beefy(14, {});
+  // GRANDPA finalize block #16 -> BEEFY should finalize #15 (genesis mandatory)
+  // and #16.
+  finalize_block_and_wait_for_beefy(16, {15, 16});
+  // GRANDPA finalize #21 -> BEEFY finalize #20 (mandatory) and #21
+  finalize_block_and_wait_for_beefy(21, {20, 21});
+}
+
+// TODO(turuslan): #1651, report equivocation
+// TEST_F(Test, beefy_reports_equivocations) {}