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|
# frozen_string_literal: true
RealFile = File
RealFileTest = FileTest
RealFileUtils = FileUtils
RealDir = Dir
RealIO = IO
RealPathname = Pathname
def RealPathname(*args)
RealPathname.new(*args)
end
def Pathname(*args)
Pathname.new(*args)
end
# FakeFS module
module FakeFS
class << self
def activated?
@activated ||= false
end
# unconditionally activate
def activate!(io_mocks: false)
Object.class_eval do
remove_const(:Dir)
remove_const(:File)
remove_const(:FileTest)
remove_const(:FileUtils)
remove_const(:Pathname)
const_set(:Dir, FakeFS::Dir)
const_set(:File, FakeFS::File)
const_set(:FileUtils, FakeFS::FileUtils)
const_set(:FileTest, FakeFS::FileTest)
const_set(:Pathname, FakeFS::Pathname)
if io_mocks
remove_const(:IO)
const_set(:IO, ::FakeFS::IO)
end
::FakeFS::Kernel.hijack!
end
@activated = true
true
end
# unconditionally deactivate
def deactivate!
Object.class_eval do
remove_const(:Dir)
remove_const(:File)
remove_const(:FileTest)
remove_const(:FileUtils)
remove_const(:IO)
remove_const(:Pathname)
const_set(:Dir, RealDir)
const_set(:File, RealFile)
const_set(:FileTest, RealFileTest)
const_set(:FileUtils, RealFileUtils)
const_set(:IO, RealIO)
const_set(:Pathname, RealPathname)
::FakeFS::Kernel.unhijack!
end
@activated = false
true
end
# unconditionally clear the fake filesystem
def clear!
::FakeFS::FileSystem.clear
end
# present a fresh new fake filesystem to the block
def with_fresh(&block)
clear!
with(&block)
end
# present the fake filesystem to the block
def with
if activated?
yield
else
begin
activate!
yield
ensure
deactivate!
end
end
end
# present a non-fake filesystem to the block
def without
if !activated?
yield
else
begin
deactivate!
yield
ensure
activate!
end
end
end
end
end
def FakeFS(&block)
return ::FakeFS unless block
::FakeFS.with(&block)
end
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