Ensure that running tests in parallel doesn't display schema load output

https://github.com/rails/rails/pull/33479 changed `#load_schema` to
prevent displaying schema load on running tests in parallel.
We should test this in order to prevent any regression in the future.

Context https://github.com/rails/rails/pull/33479#discussion_r206870727

1 files changed, 18 insertions, 0 deletions

diff --git a/railties/test/application/test_runner_test.rb b/railties/test/application/test_runner_test.rb
index 455dc60efd..5c34b205c9 100644
--- a/railties/test/application/test_runner_test.rb
+++ b/railties/test/application/test_runner_test.rb
@@ -525,9 +525,18 @@ module ApplicationTests
     def test_run_in_parallel_with_processes
       file_name = create_parallel_processes_test_file
 
+      app_file "db/schema.rb", <<-RUBY
+        ActiveRecord::Schema.define(version: 1) do
+          create_table :users do |t|
+            t.string :name
+          end
+        end
+      RUBY
+
       output = run_test_command(file_name)
 
       assert_match %r{Finished in.*\n2 runs, 2 assertions}, output
+      assert_no_match "create_table(:users)", output
     end
 
     def test_run_in_parallel_with_threads
@@ -539,9 +548,18 @@ module ApplicationTests
 
       file_name = create_parallel_threads_test_file
 
+      app_file "db/schema.rb", <<-RUBY
+        ActiveRecord::Schema.define(version: 1) do
+          create_table :users do |t|
+            t.string :name
+          end
+        end
+      RUBY
+
       output = run_test_command(file_name)
 
       assert_match %r{Finished in.*\n2 runs, 2 assertions}, output
+      assert_no_match "create_table(:users)", output
     end
 
     def test_raise_error_when_specified_file_does_not_exist