mspec/spec/matchers/complain_spec.rb

   1 require File.dirname(__FILE__) + '/../spec_helper'
   2 require 'mspec/expectations/expectations'
   3 require 'mspec/matchers/complain'
   4
   5 describe ComplainMatcher do
   6   it "matches when executing the proc results in output to $stderr" do
   7     proc = lambda { warn "I'm gonna tell yo mama" }
   8     ComplainMatcher.new(nil).matches?(proc).should == true
   9   end
  10
  11   it "maches when executing the proc results in the expected output to $stderr" do
  12     proc = lambda { warn "Que haces?" }
  13     ComplainMatcher.new("Que haces?\n").matches?(proc).should == true
  14     ComplainMatcher.new("Que pasa?\n").matches?(proc).should == false
  15     ComplainMatcher.new(/Que/).matches?(proc).should == true
  16     ComplainMatcher.new(/Quoi/).matches?(proc).should == false
  17   end
  18
  19   it "does not match when there is no output to $stderr" do
  20     ComplainMatcher.new(nil).matches?(lambda {}).should == false
  21   end
  22
  23   it "provides a useful failure message" do
  24     matcher = ComplainMatcher.new(nil)
  25     matcher.matches?(lambda { })
  26     matcher.failure_message.should == ["Expected a warning", "but received none"]
  27     matcher = ComplainMatcher.new("listen here")
  28     matcher.matches?(lambda { warn "look out" })
  29     matcher.failure_message.should ==
  30       ["Expected warning: \"listen here\"", "but got: \"look out\""]
  31     matcher = ComplainMatcher.new(/talk/)
  32     matcher.matches?(lambda { warn "listen up" })
  33     matcher.failure_message.should ==
  34       ["Expected warning to match:", "/talk/"]
  35   end
  36
  37   it "provides a useful negative failure message" do
  38     proc = lambda { warn "ouch" }
  39     matcher = ComplainMatcher.new(nil)
  40     matcher.matches?(proc)
  41     matcher.negative_failure_message.should ==
  42       ["Unexpected warning: ", "\"ouch\""]
  43     matcher = ComplainMatcher.new("ouchy")
  44     matcher.matches?(proc)
  45     matcher.negative_failure_message.should ==
  46       ["Expected warning: \"ouchy\"", "but got: \"ouch\""]
  47     matcher = ComplainMatcher.new(/ou/)
  48     matcher.matches?(proc)
  49     matcher.negative_failure_message.should ==
  50       ["Expected warning not to match:", "/ou/"]
  51   end
  52 end