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Contents
require 'gherkin/native'
module Gherkin
class TagExpression
native_impl('gherkin')
attr_reader :limits
def initialize(tag_expressions)
@ands = []
@limits = {}
tag_expressions.each do |expr|
add(expr.strip.split(/\s*,\s*/))
end
end
def empty?
@ands.empty?
end
def evaluate(tags)
return true if @ands.flatten.empty?
vars = Hash[*tags.map{|tag| [tag.name, true]}.flatten]
raise "No vars" if vars.nil? # Useless statement to prevent ruby warnings about unused var
!!Kernel.eval(ruby_expression)
end
private
def add(tags_with_negation_and_limits)
negatives, positives = tags_with_negation_and_limits.partition{|tag| tag =~ /^~/}
@ands << (store_and_extract_limits(negatives, true) + store_and_extract_limits(positives, false))
end
def store_and_extract_limits(tags_with_negation_and_limits, negated)
tags_with_negation = []
tags_with_negation_and_limits.each do |tag_with_negation_and_limit|
tag_with_negation, limit = tag_with_negation_and_limit.split(':')
tags_with_negation << tag_with_negation
if limit
tag_without_negation = negated ? tag_with_negation[1..-1] : tag_with_negation
if @limits[tag_without_negation] && @limits[tag_without_negation] != limit.to_i
raise "Inconsistent tag limits for #{tag_without_negation}: #{@limits[tag_without_negation]} and #{limit.to_i}"
end
@limits[tag_without_negation] = limit.to_i
end
end
tags_with_negation
end
def ruby_expression
"(" + @ands.map do |ors|
ors.map do |tag|
if tag =~ /^~(.*)/
"!vars['#{$1}']"
else
"vars['#{tag}']"
end
end.join("||")
end.join(")&&(") + ")"
end
end
end
Version data entries
7 entries across 5 versions & 2 rubygems