Module: FakeFS::Require

Included in:
Kernel
Defined in:
lib/fakefs/require.rb,
lib/fakefs/require/version.rb

Defined Under Namespace

Modules: Autoload, Load

Constant Summary collapse

VERSION = 
"0.2.2"

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.activate!(opts = {}) ⇒ Object

Activates faked #require

Options

  • :fallback => true # activates the fallback to Kernel#require

  • :autoload => true # activates faked #autoload, #autoload? and #const_missing

  • :load => true # activates faked #load



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# File 'lib/fakefs/require.rb', line 15

def self.activate! opts = {}
  return if active?
  
  @active = true
  
  @opts = {
    :fallback => false,
    :autoload => false,
    :load => false,
  }.merge opts
  
  Kernel.class_eval do
    alias_method :fakefs_original_require, :require
    alias_method :require, :fakefs_require
  end
  
  Module.class_eval do
    alias_method :fakefs_original_autoload, :autoload
    alias_method :autoload, :fakefs_autoload
    
    alias_method :fakefs_original_autoload?, :autoload?
    alias_method :autoload?, :fakefs_autoload?
    
    alias_method :fakefs_original_const_missing, :const_missing
    alias_method :const_missing, :fakefs_const_missing
  end if @opts[:autoload]
  
  Kernel.class_eval do
    alias_method :fakefs_original_load, :load
    alias_method :load, :fakefs_load
  end if @opts[:load]
end

.active? ⇒ Boolean

Returns whether FakeFS::Require is active

Returns:

  • (Boolean) 


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# File 'lib/fakefs/require.rb', line 72

def self.active?
  @active
end

.autoloadable ⇒ Object

Returns a hash containing autoload data



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# File 'lib/fakefs/require.rb', line 82

def self.autoloadable
  @autoloadable ||= {}
end

.clear ⇒ Object

Clears the autoload data hash



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# File 'lib/fakefs/require.rb', line 87

def self.clear
  @autoloadable = {}
end

.deactivate! ⇒ Object

Deactivates the faked methods



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# File 'lib/fakefs/require.rb', line 49

def self.deactivate!
  return unless active?
  
  @active = false
  
  Kernel.class_eval do
    alias_method :require, :fakefs_original_require
  end
  
  Module.class_eval do
    alias_method :autoload, :fakefs_original_autoload
    alias_method :autoload?, :fakefs_original_autoload?
    alias_method :const_missing, :fakefs_original_const_missing
  end if @opts[:autoload]
  
  Kernel.class_eval do
    alias_method :load, :fakefs_original_load
  end if @opts[:load]
  
  @opts = nil
end

.opts ⇒ Object

Returns the options passed to ::activate!



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# File 'lib/fakefs/require.rb', line 77

def self.opts
  @opts
end

.resolve(fn) ⇒ Object

Resolves the passed filename to a path



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# File 'lib/fakefs/require.rb', line 92

def self.resolve fn
  found = nil
  if fn[0...1] == "/"
    found = fn if File.exist? fn
  else
    $LOAD_PATH.each do |p|
      path = p + "/" + fn
      found = path if File.exist? path
    end
  end
  
  return found
end

Instance Method Details

#fakefs_require(fn) ⇒ Object

Faked #require (see Kernel#require)

Raises:

  • (LoadError) 


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# File 'lib/fakefs/require.rb', line 107

def fakefs_require fn
  fn = fn.to_s
  orig_fn = fn.dup
  
  fn = fn + ".rb" unless fn[-3..-1] == ".rb"
  path = FakeFS::Require.resolve fn
  
  if path
    return false if $".include? fn
    
    File.open(path, "r") {|f| Object.class_eval f.read, fn, 1 }
    $" << fn
    return true
  elsif FakeFS::Require.opts[:fallback]
    opts = FakeFS::Require.opts
    begin
      FakeFS.deactivate!
      FakeFS::Require.deactivate!
      return fakefs_original_require orig_fn
    ensure
      FakeFS::Require.activate! opts
      FakeFS.activate!
    end
  end
  
  raise LoadError, "no such file to load -- " + orig_fn
end