AssociationCollection#to_ary should definitely dup the target! Also changed #replace which was previously incorrect, but the test passed due to the fact that to_a was not duping.

We shouldn't be using scoped.scoping { ... } to build associated records, as this can affect validations/callbacks/etc inside the record itself [#6252 state:resolved]

Test non zero exit code and that a message still appears when generating inside an existing Rails directory.

Unfortunately, I can't find out how to suppress its output so we see ....Invalid application name test. Please give a name which does not match one of the reserved rails words.....................................

Use Thor's self.exit_on_failure? to exit whenever accessing the generators from the CLI and a Thor::Error is raised.

Apply exit code 1 when commands don't succeed so that other libraries can properly detect the failure.

test_first_and_array_index_zero_methods_return_the_same_value_when_nested_attributes_are_set_to_update_existing_record added