Run tests with rails 6 (fix test failures)

[pravi]

After making rails 6 the default rails version,

diff --git a/Gemfile b/Gemfile
index 06b1701..68863be 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,10 +5,13 @@ gemspec
 if ENV["RAILS_VERSION"] && (ENV["RAILS_VERSION"].to_i == 4)
   gem "rails", "< 5"
   gem "rspec-rails", "> 3"
+elsif ENV["RAILS_VERSION"] && (ENV["RAILS_VERSION"].to_i == 5)
+  gem "rails", "< 6"
+  gem "rspec-rails", "> 3"
 elsif ENV["RAILS_VERSION"] && (ENV["RAILS_VERSION"].to_i == 0)
   # no-op. No Rails.
 else
-  gem "rails", "< 6"
+  gem "rails", "< 7"
   gem "rspec-rails", "> 3"
 end

some tests are failing

$ bundle update rails
$ bundle exec rails
Failures:

  1) Rails Integration doesn't do anything on a normal route
     Failure/Error: expect(response.status).to eq(200)
     
       expected: 200
            got: 403
     
       (compared using ==)
     # ./spec/raven/integrations/rails_spec.rb:19:in `block (2 levels) in <top (required)>'

  2) Rails Integration should capture exceptions in production
     Failure/Error: expect(response.status).to eq(500)
     
       expected: 500
            got: 403
     
       (compared using ==)
     # ./spec/raven/integrations/rails_spec.rb:26:in `block (2 levels) in <top (required)>'

  3) Rails Integration should properly set the exception's URL
     Failure/Error: event = JSON.parse!(Raven.client.transport.events.first[1])
     
     NoMethodError:
       undefined method `[]' for nil:NilClass
     # ./spec/raven/integrations/rails_spec.rb:35:in `block (2 levels) in <top (required)>'

  4) Rails Integration sets transaction to ControllerName#method
     Failure/Error: event = JSON.parse!(Raven.client.transport.events.first[1])
     
     NoMethodError:
       undefined method `[]' for nil:NilClass
     # ./spec/raven/integrations/rails_spec.rb:42:in `block (2 levels) in <top (required)>'

We'd like to switch to rails 6 for next release of debian and it'd be nice if these tests can be fixed.

[st0012]

hey @pravi thanks for reporting 😄 I've opened #982 for this.