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class SpecEvaluate
include MSpecMatchers
def self.desc=(desc)
@desc = desc
end
def self.desc
@desc ||= "evaluates "
end
def initialize(ruby, desc)
@ruby = ruby.rstrip
@desc = desc || self.class.desc
end
# Formats the Ruby source code for reabable output in the -fs formatter
# option. If the source contains no newline characters, wraps the source in
# single quotes to set if off from the rest of the description string. If
# the source does contain newline characters, sets the indent level to four
# characters.
def format(ruby, newline=true)
if ruby.include?("\n")
lines = ruby.each_line.to_a
if /( *)/ =~ lines.first
if $1.size > 4
dedent = $1.size - 4
ruby = lines.map { |l| l[dedent..-1] }.join
else
indent = " " * (4 - $1.size)
ruby = lines.map { |l| "#{indent}#{l}" }.join
end
end
"\n#{ruby}"
else
"'#{ruby.lstrip}'"
end
end
def define(&block)
ruby = @ruby
desc = @desc
evaluator = self
specify "#{desc} #{format ruby}" do
evaluator.instance_eval(ruby)
evaluator.instance_eval(&block)
end
end
end
def evaluate(str, desc=nil, &block)
SpecEvaluate.new(str, desc).define(&block)
end
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