Assert against in-project frames only

Ruby 3.3 adds additional frames to the top of the stacktrace so frame 0
is no longer the frame we want to assert against

features/fixtures/plain/app/app.rb

@@ -17,7 +17,7 @@ def configure_using_environment
     conf.ignore_classes << lambda { |ex| ex.class.to_s == ENV["BUGSNAG_IGNORE_CLASS"] } if ENV.include? "BUGSNAG_IGNORE_CLASS"
     conf.meta_data_filters << ENV["BUGSNAG_META_DATA_FILTERS"] if ENV.include? "BUGSNAG_META_DATA_FILTERS"
     conf.enabled_release_stages = [ENV["BUGSNAG_NOTIFY_RELEASE_STAGE"]] if ENV.include? "BUGSNAG_NOTIFY_RELEASE_STAGE"
-    conf.project_root = ENV["BUGSNAG_PROJECT_ROOT"] if ENV.include? "BUGSNAG_PROJECT_ROOT"
+    conf.project_root = __dir__
     conf.proxy_host = ENV["BUGSNAG_PROXY_HOST"] if ENV.include? "BUGSNAG_PROXY_HOST"
     conf.proxy_password = ENV["BUGSNAG_PROXY_PASSWORD"] if ENV.include? "BUGSNAG_PROXY_PASSWORD"
     conf.proxy_port = ENV["BUGSNAG_PROXY_PORT"] if ENV.include? "BUGSNAG_PROXY_PORT"

features/plain_features/unhandled_errors.feature

@@ -9,8 +9,8 @@ Scenario Outline: An unhandled error sends a report
   And the event "severityReason.type" equals "unhandledException"
   And the event "device.time" is a timestamp
   And the exception "errorClass" equals "<error>"
-  And the "file" of stack frame 0 equals "/usr/src/app/unhandled/<file>.rb"
-  And the "lineNumber" of stack frame 0 equals <lineNumber>
+  And the "file" of the first in-project stack frame equals "/usr/src/app/unhandled/<file>.rb"
+  And the "lineNumber" of the first in-project stack frame equals <lineNumber>
 
   Examples:
   | file              | error          | lineNumber | command          |

features/steps/ruby_notifier_steps.rb

@@ -12,6 +12,21 @@
   }
 end
 
+Then(/^the "(.+)" of the first in-project stack frame equals (\d+|".+")$"/) do |key, expected|
+  body = Maze::Server.errors.current[:body]
+  stacktrace = Maze::Helper.read_key_path(body, 'events.0.exceptions.0.stacktrace')
+
+  frame_index = stacktrace.find_index { |frame| frame["inProject"] == true }
+
+  if frame_index.nil?
+    raise "Unable to find an in-project stack frame in stacktrace: #{stacktrace.inspect}"
+  end
+
+  steps %Q{
+    the "#{key}" of stack frame #{frame_index} equals #{expected}
+  }
+end
+
 Then(/^the total sessionStarted count equals (\d+)$/) do |value|
   body = Maze::Server.sessions.current[:body]
   session_counts = Maze::Helper.read_key_path(body, "sessionCounts")