`inspect` for AR model classes does not initiate a new connection.

1 files changed, 20 insertions, 0 deletions

diff --git a/activerecord/test/cases/invalid_connection_test.rb b/activerecord/test/cases/invalid_connection_test.rb
new file mode 100644
index 0000000000..f6fe7f0d7d
--- /dev/null
+++ b/activerecord/test/cases/invalid_connection_test.rb
@@ -0,0 +1,20 @@
+require "cases/helper"
+require "models/bird"
+
+class TestAdapterWithInvalidConnection < ActiveRecord::TestCase
+  self.use_transactional_fixtures = false
+
+  def setup
+    @spec = ActiveRecord::Base.connection_config
+    non_existing_spec = {adapter: @spec[:adapter], database: "i_do_not_exist"}
+    ActiveRecord::Base.establish_connection(non_existing_spec)
+  end
+
+  def teardown
+    ActiveRecord::Base.establish_connection(@spec)
+  end
+
+  test "inspect on Model class does not raise" do
+    assert_equal "Bird(no database connection)", Bird.inspect
+  end
+end