Class: Mutant::WarningFilter

Inherits:
Object
  • Object
show all
Defined in:
lib/mutant/warning_filter.rb

Overview

Stream filter for warnings

Constant Summary collapse

WARNING_PATTERN = 
/\A(?:.+):(?:\d+): warning: (?:.+)\n\z/

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(target) ⇒ undefined

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Initialize object



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# File 'lib/mutant/warning_filter.rb', line 16

def initialize(target)
  @target   = target
  @warnings = []
end

Instance Attribute Details

#warnings ⇒ Array<String> (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Return filtered warnings



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# File 'lib/mutant/warning_filter.rb', line 27

def warnings
  @warnings
end

Class Method Details

.use ⇒ Array<String>

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Use warning filter during block execution



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# File 'lib/mutant/warning_filter.rb', line 64

def self.use
  original = $stderr
  $stderr = filter = new(original)
  yield
  filter.warnings
ensure
  $stderr = original
end

Instance Method Details

#write(message) ⇒ self

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Write message to target filtering warnings



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# File 'lib/mutant/warning_filter.rb', line 48

def write(message)
  if WARNING_PATTERN =~ message
    warnings << message
  else
    target.write(message)
  end

  self
end