Replace `assert !` with `assert_not`

This autocorrects the violations after adding a custom cop in
3305c78dcd.

2 files changed, 3 insertions, 3 deletions

diff --git a/railties/test/application/middleware/sendfile_test.rb b/railties/test/application/middleware/sendfile_test.rb
index 9def3a0ce7..818ad61c64 100644
--- a/railties/test/application/middleware/sendfile_test.rb
+++ b/railties/test/application/middleware/sendfile_test.rb
@@ -29,7 +29,7 @@ module ApplicationTests
       simple_controller
 
       get "/"
-      assert !last_response.headers["X-Sendfile"]
+      assert_not last_response.headers["X-Sendfile"]
       assert_equal File.read(__FILE__), last_response.body
     end
 
diff --git a/railties/test/application/middleware/session_test.rb b/railties/test/application/middleware/session_test.rb
index a17988235a..9182a63ab7 100644
--- a/railties/test/application/middleware/session_test.rb
+++ b/railties/test/application/middleware/session_test.rb
@@ -31,7 +31,7 @@ module ApplicationTests
       add_to_config "config.force_ssl = true"
       add_to_config "config.ssl_options = { secure_cookies: false }"
       require "#{app_path}/config/environment"
-      assert !app.config.session_options[:secure]
+      assert_not app.config.session_options[:secure]
     end
 
     test "session is not loaded if it's not used" do
@@ -51,7 +51,7 @@ module ApplicationTests
       get "/"
 
       assert last_request.env["HTTP_COOKIE"]
-      assert !last_response.headers["Set-Cookie"]
+      assert_not last_response.headers["Set-Cookie"]
     end
 
     test "session is empty and isn't saved on unverified request when using :null_session protect method" do