class OutputToFDMatcher
Lower-level output speccing mechanism for a single output stream. Unlike OutputMatcher which provides methods to capture the output, we actually replace the FD itself so that there is no reliance on a certain method being used.
Public Class Methods
new(expected, to)
click to toggle source
# File lib/mspec/matchers/output_to_fd.rb, line 10 def initialize(expected, to) @to, @expected = to, expected case @to when STDOUT @to_name = "STDOUT" when STDERR @to_name = "STDERR" when IO @to_name = @to.object_id.to_s else raise ArgumentError, "#{@to.inspect} is not a supported output target" end end
Public Instance Methods
failure_message()
click to toggle source
# File lib/mspec/matchers/output_to_fd.rb, line 57 def failure_message() ["Expected (#{@to_name}): #{@expected.inspect}\n", "#{'but got'.rjust(@to_name.length + 10)}: #{@actual.inspect}\nBacktrace"] end
matches?(block)
click to toggle source
# File lib/mspec/matchers/output_to_fd.rb, line 25 def matches?(block) old_to = @to.dup out = File.open(tmp("mspec_output_to_#{$$}_#{Time.now.to_i}"), 'w+') # Replacing with a file handle so that Readline etc. work @to.reopen out block.call ensure begin @to.reopen old_to out.rewind @actual = out.read case @expected when Regexp return !(@actual =~ @expected).nil? else return @actual == @expected end # Clean up ensure out.close unless out.closed? FileUtils.rm out.path end return true end
negative_failure_message()
click to toggle source
# File lib/mspec/matchers/output_to_fd.rb, line 62 def negative_failure_message() ["Expected output (#{@to_name}) to NOT be:\n", @actual.inspect] end