Fix sentry-sidekiq's build failure

sentry-sidekiq/Gemfile

@@ -17,14 +17,20 @@ gem "loofah", "2.20.0" if RUBY_VERSION.to_f < 2.5
 
 sidekiq_version = ENV["SIDEKIQ_VERSION"]
 sidekiq_version = "6.0" if sidekiq_version.nil?
+sidekiq_version = Gem::Version.new(sidekiq_version)
 
-gem "sidekiq", "~> #{sidekiq_version}"
-gem "rails"
+if sidekiq_version >= Gem::Version.new("7.0")
+  # This is for a unreleased fix for sidekiq 7
+  # https://github.com/sidekiq/sidekiq/commit/b7236f814ccb61d3b1e6fc5251ed3d3ac7428eb3
+  gem "sidekiq", github: "sidekiq/sidekiq"
+else
+  gem "sidekiq", "~> #{sidekiq_version}"
+end
+gem "rails", "> 5.0.0", "< 7.1.0"
 
 if RUBY_VERSION.to_f >= 2.6
   gem "debug", github: "ruby/debug", platform: :ruby
   gem "irb"
 end
 
 gem "pry"
-

sentry-sidekiq/spec/sentry/sidekiq/sentry_context_middleware_spec.rb

@@ -22,7 +22,7 @@
     execute_worker(processor, SadWorker)
 
     expect(transport.events.count).to eq(1)
-    event = transport.events.first
+    event = transport.events[0]
     expect(event.user).to eq(user)
   end
 
@@ -36,7 +36,7 @@
       execute_worker(processor, HappyWorker)
 
       expect(transport.events.count).to eq(1)
-      transaction = transport.events.first
+      transaction = transport.events[0]
       expect(transaction).not_to be_nil
       expect(transaction.user).to eq(user)
     end
@@ -45,7 +45,7 @@
       execute_worker(processor, SadWorker)
 
       expect(transport.events.count).to eq(2)
-      transaction = transport.events.first
+      transaction = transport.events[0]
       expect(transaction.user).to eq(user)
       event = transport.events.last
       expect(event.user).to eq(user)
@@ -65,7 +65,7 @@
         execute_worker(processor, HappyWorker, trace_propagation_headers: trace_propagation_headers)
 
         expect(transport.events.count).to eq(1)
-        transaction = transport.events.first
+        transaction = transport.events[0]
         expect(transaction).not_to be_nil
         expect(transaction.contexts.dig(:trace, :trace_id)).to eq(parent_transaction.trace_id)
       end
@@ -140,11 +140,11 @@
 
       q = queue.to_a
       expect(q.size).to be(2)
-      first_headers = q.first["trace_propagation_headers"]
+      first_headers = q[0]["trace_propagation_headers"]
       expect(first_headers["sentry-trace"]).to eq(transaction.to_sentry_trace)
       expect(first_headers["baggage"]).to eq(transaction.to_baggage)
 
-      second_headers = q.second["trace_propagation_headers"]
+      second_headers = q[1]["trace_propagation_headers"]
       expect(second_headers["sentry-trace"]).to eq(transaction.to_sentry_trace)
       expect(second_headers["baggage"]).to eq(transaction.to_baggage)
     end