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lib/optparse.rb: Show a did_you_mean hint for unknown option

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```
require 'optparse'

OptionParser.new do |opts|
  opts.on("-f", "--foo", "foo") {|v| }
  opts.on("-b", "--bar", "bar") {|v| }
  opts.on("-c", "--baz", "baz") {|v| }
end.parse!
```

```
$ ruby test.rb --baa
Traceback (most recent call last):
test.rb:7:in `<main>': invalid option: --baa (OptionParser::InvalidOption)
Did you mean?  baz
               bar
```
This commit is contained in:
Yusuke Endoh 2019-10-16 16:31:41 +09:00
parent 5ca5529d22
commit c3b64a86bc
Notes: git 2019-10-18 12:21:20 +09:00
2 changed files with 38 additions and 2 deletions
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22
test/optparse/test_did_you_mean.rb Normal file
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# frozen_string_literal: false
require_relative 'test_optparse'
require "did_you_mean" rescue return
class TestOptionParser::DidYouMean < TestOptionParser
def setup
super
@opt.def_option("--foo", Integer) { |v| @foo = v }
@opt.def_option("--bar", Integer) { |v| @bar = v }
@opt.def_option("--baz", Integer) { |v| @baz = v }
end
def test_did_you_mean
assert_raise(OptionParser::InvalidOption) do
begin
@opt.permute!(%w"--baa")
ensure
assert_equal("invalid option: --baa\nDid you mean? baz\n bar", $!.message)
end
end
end
end