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Switch between fake & real fs. #24

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Switch between fake & real fs. #24

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94ba095
Switch between fake & real fs.
Aug 12, 2016
d28aaab
Rewritten .halt & implemented .halt spec
Aug 14, 2016
9cf83ef
Rewritten MemFs#halt() to operate on the newly introduced 'clear' par…
Aug 25, 2016
4ebbed4
New test case: Make sure #halt() switches back even when an exception…
Aug 26, 2016
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31 changes: 31 additions & 0 deletions lib/memfs.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -100,6 +100,37 @@ def deactivate!
end
module_function :deactivate!

# Switches back to the original file system, calls the given block (if any),
# and switches back afterwards.
#
# Allows for file & dir operations that need to take place on the real fs.
#
# @example
# MemFs.halt do
# puts Dir.getwd
# end
#
# @return nothing
def halt

switch_to = -> dir_class, file_class {
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Prefer do...end for multi-line blocks without chaining.
Use the lambda method for multi-line lambdas.
Wrap stabby lambda arguments with parentheses.
Trailing whitespace detected.

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Ups, sorry for the many violations - feel free to rewrite the code if you like the feature. I'm still a sort of apprentice when it comes to Ruby...


Object.class_eval do
remove_const :Dir
remove_const :File

const_set :Dir, dir_class
const_set :File, file_class
end
}

switch_to.call MemFs::OriginalDir, MemFs::OriginalFile
yield if block_given?
ensure
switch_to.call MemFs::Dir, MemFs::File
end
module_function :halt

# Creates a file and all its parent directories.
#
# @param path: The path of the file to create.
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