Sha256: c7989719c17a62afab2ae2520b7eb4cf9540b0fcbdc5afaa7f0f17cde143a3f1
Contents?: true
Size: 1.92 KB
Versions: 13
Compression:
Stored size: 1.92 KB
Contents
require 'prop_check/helper'
class PropCheck::Property::Shrinker
def initialize(bindings_tree, io, hooks, config)
@problem_child = bindings_tree
@io = io
@siblings = @problem_child.children.lazy
@parent_siblings = nil
@problem_exception = nil
@shrink_steps = 0
@hooks = hooks
@config = config
end
def self.call(bindings_tree, io, hooks, config, &block)
self
.new(bindings_tree, io, hooks, config)
.call(&block)
end
def call(&block)
@io.puts 'Shrinking...' if @config.verbose
shrink(&block)
print_shrinking_exceeded_message if @shrink_steps >= @config.max_shrink_steps
[@problem_child.root, @problem_exception, @shrink_steps]
end
private def shrink(&block)
wrapped_enum.each do
instruction, sibling = safe_read_sibling
break if instruction == :break
next if instruction == :next
inc_shrink_step
safe_call_block(sibling, &block)
end
end
private def wrapped_enum
@hooks.wrap_enum(0..@config.max_shrink_steps).lazy
end
private def inc_shrink_step
@shrink_steps += 1
@io.print '.' if @config.verbose
end
private def safe_read_sibling
begin
sibling = @siblings.next
[:continue, sibling]
rescue StopIteration
return [:break, nil] if @parent_siblings.nil?
@siblings = @parent_siblings.lazy
@parent_siblings = nil
[:next, nil]
end
end
private def safe_call_block(sibling, &block)
begin
PropCheck::Helper.call_splatted(sibling.root, &block)
# It is correct that we want to rescue _all_ Exceptions
# not only 'StandardError's
rescue Exception => e
@problem_child = sibling
@parent_siblings = @siblings
@siblings = @problem_child.children.lazy
@problem_exception = e
end
end
private def print_shrinking_exceeded_message
@io.puts "(Note: Exceeded #{@config.max_shrink_steps} shrinking steps, the maximum.)"
end
end
Version data entries
13 entries across 13 versions & 1 rubygems