Remove redundant `assert_respond_to`

It is covered by following assertion.

1 files changed, 3 insertions, 13 deletions

diff --git a/actioncable/test/subscription_adapter/base_test.rb b/actioncable/test/subscription_adapter/base_test.rb
index 212ea49d2f..5793415b5f 100644
--- a/actioncable/test/subscription_adapter/base_test.rb
+++ b/actioncable/test/subscription_adapter/base_test.rb
@@ -39,35 +39,25 @@ class ActionCable::SubscriptionAdapter::BaseTest < ActionCable::TestCase
   # TEST METHODS THAT ARE REQUIRED OF THE ADAPTER'S BACKEND STORAGE OBJECT
 
   test "#broadcast is implemented" do
-    broadcast = SuccessAdapter.new(@server).broadcast("channel", "payload")
-
-    assert_respond_to(SuccessAdapter.new(@server), :broadcast)
-
     assert_nothing_raised do
-      broadcast
+      SuccessAdapter.new(@server).broadcast("channel", "payload")
     end
   end
 
   test "#subscribe is implemented" do
     callback = lambda { puts "callback" }
     success_callback = lambda { puts "success" }
-    subscribe = SuccessAdapter.new(@server).subscribe("channel", callback, success_callback)
-
-    assert_respond_to(SuccessAdapter.new(@server), :subscribe)
 
     assert_nothing_raised do
-      subscribe
+      SuccessAdapter.new(@server).subscribe("channel", callback, success_callback)
     end
   end
 
   test "#unsubscribe is implemented" do
     callback = lambda { puts "callback" }
-    unsubscribe = SuccessAdapter.new(@server).unsubscribe("channel", callback)
-
-    assert_respond_to(SuccessAdapter.new(@server), :unsubscribe)
 
     assert_nothing_raised do
-      unsubscribe
+      SuccessAdapter.new(@server).unsubscribe("channel", callback)
     end
   end
 end