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Versions: 48
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Contents
require('cucumber/cucumber_expressions/generated_expression')
module Cucumber
module CucumberExpressions
class CombinatorialGeneratedExpressionFactory
def initialize(expression_template, parameter_type_combinations)
@expression_template = expression_template
@parameter_type_combinations = parameter_type_combinations
end
def generate_expressions
generated_expressions = []
generate_permutations(generated_expressions, 0, [])
generated_expressions
end
# 256 generated expressions ought to be enough for anybody
MAX_EXPRESSIONS = 256
def generate_permutations(generated_expressions, depth, current_parameter_types)
if generated_expressions.length >= MAX_EXPRESSIONS
return
end
if depth == @parameter_type_combinations.length
generated_expression = GeneratedExpression.new(@expression_template, current_parameter_types)
generated_expressions.push(generated_expression)
return
end
(0...@parameter_type_combinations[depth].length).each do |i|
# Avoid recursion if no elements can be added.
if generated_expressions.length >= MAX_EXPRESSIONS
return
end
new_current_parameter_types = current_parameter_types.dup # clone
new_current_parameter_types.push(@parameter_type_combinations[depth][i])
generate_permutations(
generated_expressions,
depth + 1,
new_current_parameter_types
)
end
end
end
end
end
Version data entries
48 entries across 48 versions & 5 rubygems