class Cucumber::Glue::InvokeInWorld
Utility methods for executing step definitions with nice backtraces etc. TODO: add unit tests TODO: refactor for readability
Constants
- INSTANCE_EXEC_OFFSET
Public Class Methods
cucumber_compatible_arity?(args, block)
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# File lib/cucumber/glue/invoke_in_world.rb, line 43 def self.cucumber_compatible_arity?(args, block) return true if block.arity == args.length if block.arity < 0 return true if args.length >= (block.arity.abs - 1) end false end
cucumber_instance_exec_in(world, check_arity, pseudo_method, *args, &block)
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# File lib/cucumber/glue/invoke_in_world.rb, line 25 def self.cucumber_instance_exec_in(world, check_arity, pseudo_method, *args, &block) cucumber_run_with_backtrace_filtering(pseudo_method) do if check_arity && !cucumber_compatible_arity?(args, block) world.instance_exec do ari = block.arity ari = ari < 0 ? (ari.abs - 1).to_s + '+' : ari s1 = ari == 1 ? '' : 's' s2 = args.length == 1 ? '' : 's' raise ArityMismatchError.new( "Your block takes #{ari} argument#{s1}, but the Regexp matched #{args.length} argument#{s2}." ) end else world.instance_exec(*args, &block) end end end
cucumber_run_with_backtrace_filtering(pseudo_method) { || ... }
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# File lib/cucumber/glue/invoke_in_world.rb, line 51 def self.cucumber_run_with_backtrace_filtering(pseudo_method) begin yield rescue Exception => e instance_exec_invocation_line = "#{__FILE__}:#{__LINE__ - 2}:in `cucumber_run_with_backtrace_filtering'" replace_instance_exec_invocation_line!((e.backtrace || []), instance_exec_invocation_line, pseudo_method) raise e end end
replace_instance_exec_invocation_line!(backtrace, instance_exec_invocation_line, pseudo_method)
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# File lib/cucumber/glue/invoke_in_world.rb, line 9 def self.replace_instance_exec_invocation_line!(backtrace, instance_exec_invocation_line, pseudo_method) return if Cucumber.use_full_backtrace instance_exec_pos = backtrace.index(instance_exec_invocation_line) if instance_exec_pos replacement_line = instance_exec_pos + INSTANCE_EXEC_OFFSET backtrace[replacement_line].gsub!(/`.*'/, "`#{pseudo_method}'") if pseudo_method depth = backtrace.count { |line| line == instance_exec_invocation_line } end_pos = depth > 1 ? instance_exec_pos : -1 backtrace[replacement_line + 1..end_pos] = nil backtrace.compact! end end