Load both `:authors` and `:author_addresses` to keep data integrity

`:authors` has a foreign key to `:author_addresses`.
If only `:authors` fixture loaded into the database which supports
foreign key and checks the existing data when enabling foreien keys
like Oracle, it raises the following error

`ORA-02298: cannot validate (ARUNIT.FK_RAILS_94423A17A3) - parent keys not found`

It is because there is no parent data exists in `author_addresses` table.

Here are how other database with foreign key support works:

- MySQL does not check the existing data when enabling foreign key by `foreign_key_checks=1`
https://dev.mysql.com/doc/refman/5.7/en/server-system-variables.html#sysvar_foreign_key_checks
> Setting foreign_key_checks to 1 does not trigger a scan of the existing table data. Therefore, rows added to the table while foreign_key_checks=0 will not be verified for consistency.

- PostgreSQL database itself has a feature to check existing data when
enabling foreign key and discussed at #27636, which is reverted.

1 files changed, 1 insertions, 1 deletions

diff --git a/activerecord/test/cases/associations/inverse_associations_test.rb b/activerecord/test/cases/associations/inverse_associations_test.rb
index 86a034b429..e13cf93dcf 100644
--- a/activerecord/test/cases/associations/inverse_associations_test.rb
+++ b/activerecord/test/cases/associations/inverse_associations_test.rb
@@ -283,7 +283,7 @@ class InverseHasOneTests < ActiveRecord::TestCase
 end
 
 class InverseHasManyTests < ActiveRecord::TestCase
-  fixtures :men, :interests, :posts, :authors
+  fixtures :men, :interests, :posts, :authors, :author_addresses
 
   def test_parent_instance_should_be_shared_with_every_child_on_find
     m = men(:gordon)