Exception: SilentAssay

Inherits:
OutputAssay show all
Defined in:
lib/assay/silent_assay.rb

Overview

Assert that there is no output, either from stdout or stderr.

SilentAssay.pass?{ puts 'foo!' }  #=> false

Constant Summary

Constants inherited from Assertion

Assertion::SIZE_LIMIT

Constants included from Assay::Assertable

Assay::Assertable::SIZE_LIMIT

Class Method Summary collapse

Methods inherited from Assertion

by_name, by_operator, inherited, register, subclasses

Methods included from Assay::Assertable

#[], #assert!, #assert_message, #assertive_name, #assertor, #fail?, #operator, #pass?, #refute!, #refute_message

Class Method Details

.assert_message ⇒ Object 



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# File 'lib/assay/silent_assay.rb', line 47

def self.assert_message(*)
  "unexpected output"
end

.fail?(&block) ⇒ Boolean

Opposite of ‘SilentAssay.pass?`.



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# File 'lib/assay/silent_assay.rb', line 40

def self.fail?(&block)
  ! pass?(&block)
end

.pass?(&block) ⇒ Boolean

Compare match against $stdout and $stderr via ‘#===` method.

Note that $stdout and $stderr are temporarily reouted to StringIO objects and the results have any trailing newline chomped off.



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# File 'lib/assay/silent_assay.rb', line 17

def self.pass?(&block)
  require 'stringio'

  begin
    stdout, stderr = $stdout, $stderr
    newout, newerr = StringIO.new, StringIO.new
    $stdout, $stderr = newout, newerr
    yield  
  ensure
    $stdout, $stderr = stdout, stderr
  end

  newout, newerr = newout.string.chomp("\n"), newerr.string.chomp("\n")

  newout.empty? && newerr.empty?
end

.refute_message ⇒ Object 



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# File 'lib/assay/silent_assay.rb', line 54

def self.refute_message(*)
  "expected output"
end