In a Rails project, I have created a new class inside the lib
directory, this class is namespaced inside a module. When creating a spec file for it, I'm seeing NameError: uninitialized constant MyNamespace
.
Here is my folder structure
app/
...
lib
my_namespace
my_new_class.rb
another_namespace
another_old_class.rb
spec
lib
my_namespace
my_new_class_spec.rb
another_namespace
another_old_class_spec.rb
Here the (abbreviated) contents of:
lib/my_namespace/my_new_class.rb
module MyNamespace
class MyNewClass
end
end
spec/lib/my_namespace/my_new_class_spec.rb
RSpec.describe MyNamespace::MyNewClass do
it "is true"
expect(true).to eq(true) # irrelevant at this point
end
end
The reason I included another_old_class_spec.rb
is that its tests run without issue and I can't find anywhere that it's explicitly loaded or required in the test setup (in case that might be a potential issue).
When running the test with bundle exec rspec spec/lib/my_namespace/my_new_class_spec.rb
or even bundle exec rspec spec/lib/my_namespace/
I get
An error occurred while loading ./spec/lib/my_namespace/my_new_class_spec.rb
Failure/Error:
RSpec.describe MyNamespace::MyNewClass do
NameError:
uninitialized constant MyNamespace
CodePudding user response:
Like Georgiy Melnikov implied in his comment, by default the /lib
directory is not in autoload paths, so the constant MyNamespace
is not automatically resolved.
You basically have two options to fix this:
- explicitly require the file with
require lib/my_namespace/my_new_class
at the top of the spec file - add
lib/
to autoload paths (nowadays this is discouraged)