Use bcrypt's public cost attr, not internal constant

See:

- https://github.com/codahale/bcrypt-ruby/pull/63
- https://github.com/codahale/bcrypt-ruby/pull/64
- https://github.com/codahale/bcrypt-ruby/pull/65

1 files changed, 8 insertions, 0 deletions

diff --git a/activemodel/test/cases/secure_password_test.rb b/activemodel/test/cases/secure_password_test.rb
index 98e5c747d5..41d0b2263e 100644
--- a/activemodel/test/cases/secure_password_test.rb
+++ b/activemodel/test/cases/secure_password_test.rb
@@ -82,6 +82,14 @@ class SecurePasswordTest < ActiveModel::TestCase
     assert_equal BCrypt::Engine::DEFAULT_COST, @user.password_digest.cost
   end
 
+  test "Password digest cost honors bcrypt cost attribute when min_cost is false" do
+    ActiveModel::SecurePassword.min_cost = false
+    BCrypt::Engine.cost = 5
+
+    @user.password = "secret"
+    assert_equal BCrypt::Engine.cost, @user.password_digest.cost
+  end
+
   test "Password digest cost can be set to bcrypt min cost to speed up tests" do
     ActiveModel::SecurePassword.min_cost = true