[MacRuby-devel] Help with bug from Cucumber codebase
M. Scott Ford
scott at vaderpi.com
Wed Feb 11 11:48:18 PST 2009
Sorry to reply to my own post but I have been playing with this all
day to figure out what is wrong. I have narrowed the problem down to
the merge method, but I am not sure how to fix it. Here are some test
cases. These all pass in ruby 1.9.1. The first one fails in MacRuby
trunk, but the other two pass.
h = Hash.new do |h, k|
12
end
h = h.merge({1 => 2})
assert_equal(h[1], 2)
assert_equal(h[:random], 12)
h = Hash.new do |h, k|
12
end
h.merge!({1 => 2})
assert_equal(h[1], 2)
assert_equal(h[:random], 12)
h = Hash.new do |h, k|
12
end
h.merge({1 => 2})
assert_equal(h[1], 12)
assert_equal(h[:random], 12)
On Feb 11, 2009, at 11:53 AM, M. Scott Ford wrote:
> Hello,
>
> I have been trying to get cucumber working with MacRuby, and I have
> run into a bug. I have tracked the source of it down to a block of
> code in cucumber's code base[BLOCK 1]. I have condensed this down to
> a much smaller example[BLOCK 2]. In ruby 1.9.1 the second block
> results in 'yellow,bold', but in macruby the second block results in
> nil.
>
> My guess is that there is a bug in the merge implementation or the
> constructor implementation. I am not familiar enough with ruby to
> know which, so I will take a look at both. I feel this should be
> added as a test case, but I am not sure where to put that, since I
> am new to the project. Any tips?
>
> -Scott
>
> ----- BLOCK 1 ----------
> ALIASES = Hash.new do |h,k|
> if k.to_s =~ /(.*)_param/
> h[$1] + ',bold'
> end
> end.merge({
> 'missing' => 'yellow',
> 'pending' => 'yellow',
> 'failed' => 'red',
> 'passed' => 'green',
> 'outline' => 'cyan',
> 'skipped' => 'cyan',
> 'comment' => 'grey',
> 'tag' => 'blue'
> })
>
> if ENV['CUCUMBER_COLORS'] # Example: export
> CUCUMBER_COLORS="passed=red:failed=yellow"
> ENV['CUCUMBER_COLORS'].split(':').each do |pair|
> a = pair.split('=')
> ALIASES[a[0]] = a[1]
> end
> end
>
> ALIASES.each do |method, color|
> unless method =~ /.*_param/
> code = <<-EOF
> def #{method}(string=nil, &proc)
> #{ALIASES[method].split(",").join("(") + "(string, &proc"
> + ")" * ALIASES[method].split(",").length}
> end
> # This resets the colour to the non-param colour
> def #{method}_param(string=nil, &proc)
> #{ALIASES[method+'_param'].split(",").join("(") +
> "(string, &proc" + ")" * ALIASES[method+'_param'].split(",").length}
> + #{ALIASES[method].split(",").join(' + ')}
> end
> EOF
> eval(code)
> end
> end
> -------------- END BLOCK 1 --------------
>
> ------- BLOCK 2 ------------------
>
> ALIASES = Hash.new do |h,k|
> if k.to_s =~ /(.*)_param/
> h[$1] + ',bold'
> end
> end.merge({
> 'missing' => 'yellow'
> })
>
> puts ALIASES['missing_param']
>
> --------- END BLOCK 2 ---------
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