Test behavior in unit test

actionpack/test/dispatch/exception_wrapper_test.rb

@@ -186,6 +186,46 @@ def backtrace
       }.inspect, wrapper.traces.inspect)
     end
 
+    test "#show? returns false when using :rescuable and the exceptions is not rescuable" do
+      exception = RuntimeError.new("")
+      wrapper = ExceptionWrapper.new(nil, exception)
+
+      env = { "action_dispatch.show_exceptions" => :rescuable }
+      request = ActionDispatch::Request.new(env)
+
+      assert_equal false, wrapper.show?(request)
+    end
+
+    test "#show? returns true when using :rescuable and the exceptions is rescuable" do
+      exception = AbstractController::ActionNotFound.new("")
+      wrapper = ExceptionWrapper.new(nil, exception)
+
+      env = { "action_dispatch.show_exceptions" => :rescuable }
+      request = ActionDispatch::Request.new(env)
+
+      assert_equal true, wrapper.show?(request)
+    end
+
+    test "#show? returns false when using :none and the exceptions is rescuable" do
+      exception = AbstractController::ActionNotFound.new("")
+      wrapper = ExceptionWrapper.new(nil, exception)
+
+      env = { "action_dispatch.show_exceptions" => :none }
+      request = ActionDispatch::Request.new(env)
+
+      assert_equal false, wrapper.show?(request)
+    end
+
+    test "#show? returns true when using :all and the exceptions is not rescuable" do
+      exception = RuntimeError.new("")
+      wrapper = ExceptionWrapper.new(nil, exception)
+
+      env = { "action_dispatch.show_exceptions" => :all }
+      request = ActionDispatch::Request.new(env)
+
+      assert_equal true, wrapper.show?(request)
+    end
+
     test "#show? emits a deprecation when show_exceptions is true" do
       exception = RuntimeError.new("")
       wrapper = ExceptionWrapper.new(nil, exception)

railties/test/application/middleware/exceptions_test.rb

@@ -273,35 +273,5 @@ def index
       error = assert_raises(RuntimeError) { get "/foo" }
       assert_equal "oops", error.message
     end
-
-    test "show_exceptions with deprecated true" do
-      controller :foo, <<-RUBY
-        class FooController < ActionController::Base
-          def index
-            raise 'oops'
-          end
-        end
-      RUBY
-
-      app.config.action_dispatch.show_exceptions = true
-
-      get "/foo"
-      assert_equal 500, last_response.status
-    end
-
-    test "show_exceptions with deprecated false" do
-      controller :foo, <<-RUBY
-        class FooController < ActionController::Base
-          def index
-            raise 'oops'
-          end
-        end
-      RUBY
-
-      app.config.action_dispatch.show_exceptions = false
-
-      error = assert_raises(RuntimeError) { get "/foo" }
-      assert_equal "oops", error.message
-    end
   end
 end