Add in-tree mspec and ruby/spec

* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
  These files can therefore be updated like any other file in MRI.
  Instructions are provided in spec/README.
  [Feature #13156] [ruby-core:79246]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 74 insertions, 0 deletions

diff --git a/spec/mspec/spec/matchers/output_spec.rb b/spec/mspec/spec/matchers/output_spec.rb
new file mode 100644
index 0000000000..264da3b569
--- /dev/null
+++ b/spec/mspec/spec/matchers/output_spec.rb
@@ -0,0 +1,74 @@
+require 'spec_helper'
+require 'mspec/expectations/expectations'
+require 'mspec/matchers'
+
+describe OutputMatcher do
+  it "matches when executing the proc results in the expected output to $stdout" do
+    proc = Proc.new { puts "bang!" }
+    OutputMatcher.new("bang!\n", nil).matches?(proc).should == true
+    OutputMatcher.new("pop", nil).matches?(proc).should == false
+    OutputMatcher.new(/bang/, nil).matches?(proc).should == true
+    OutputMatcher.new(/po/, nil).matches?(proc).should == false
+  end
+
+  it "matches when executing the proc results in the expected output to $stderr" do
+    proc = Proc.new { $stderr.write "boom!" }
+    OutputMatcher.new(nil, "boom!").matches?(proc).should == true
+    OutputMatcher.new(nil, "fizzle").matches?(proc).should == false
+    OutputMatcher.new(nil, /boom/).matches?(proc).should == true
+    OutputMatcher.new(nil, /fizzl/).matches?(proc).should == false
+  end
+
+  it "provides a useful failure message" do
+    proc = Proc.new { print "unexpected"; $stderr.print "unerror" }
+    matcher = OutputMatcher.new("expected", "error")
+    matcher.matches?(proc)
+    matcher.failure_message.should ==
+      ["Expected:\n  $stdout: \"expected\"\n  $stderr: \"error\"\n",
+       "     got:\n  $stdout: \"unexpected\"\n  $stderr: \"unerror\"\n"]
+    matcher = OutputMatcher.new("expected", nil)
+    matcher.matches?(proc)
+    matcher.failure_message.should ==
+      ["Expected:\n  $stdout: \"expected\"\n",
+       "     got:\n  $stdout: \"unexpected\"\n"]
+    matcher = OutputMatcher.new(nil, "error")
+    matcher.matches?(proc)
+    matcher.failure_message.should ==
+      ["Expected:\n  $stderr: \"error\"\n",
+       "     got:\n  $stderr: \"unerror\"\n"]
+    matcher = OutputMatcher.new(/base/, nil)
+    matcher.matches?(proc)
+    matcher.failure_message.should ==
+      ["Expected:\n  $stdout: /base/\n",
+       "     got:\n  $stdout: \"unexpected\"\n"]
+    matcher = OutputMatcher.new(nil, /octave/)
+    matcher.matches?(proc)
+    matcher.failure_message.should ==
+      ["Expected:\n  $stderr: /octave/\n",
+       "     got:\n  $stderr: \"unerror\"\n"]
+  end
+
+  it "provides a useful negative failure message" do
+    proc = Proc.new { puts "expected"; $stderr.puts "error" }
+    matcher = OutputMatcher.new("expected", "error")
+    matcher.matches?(proc)
+    matcher.negative_failure_message.should ==
+      ["Expected output not to be:\n", "  $stdout: \"expected\"\n  $stderr: \"error\"\n"]
+    matcher = OutputMatcher.new("expected", nil)
+    matcher.matches?(proc)
+    matcher.negative_failure_message.should ==
+      ["Expected output not to be:\n", "  $stdout: \"expected\"\n"]
+    matcher = OutputMatcher.new(nil, "error")
+    matcher.matches?(proc)
+    matcher.negative_failure_message.should ==
+      ["Expected output not to be:\n", "  $stderr: \"error\"\n"]
+    matcher = OutputMatcher.new(/expect/, nil)
+    matcher.matches?(proc)
+    matcher.negative_failure_message.should ==
+      ["Expected output not to be:\n", "  $stdout: \"expected\"\n"]
+    matcher = OutputMatcher.new(nil, /err/)
+    matcher.matches?(proc)
+    matcher.negative_failure_message.should ==
+      ["Expected output not to be:\n", "  $stderr: \"error\"\n"]
+  end
+end