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|
require "timeout"
module FactoryBot
# Sequences are defined using sequence within a FactoryBot.define block.
# Sequence values are generated using next.
# @api private
class Sequence
attr_reader :name, :uri_manager, :aliases
def self.find(*uri_parts)
if uri_parts.empty?
fail ArgumentError, "wrong number of arguments, expected 1+)"
else
find_by_uri FactoryBot::UriManager.build_uri(*uri_parts)
end
end
def self.find_by_uri(uri)
uri = uri.to_sym
FactoryBot::Internal.sequences.to_a.find { |seq| seq.has_uri?(uri) } ||
FactoryBot::Internal.inline_sequences.find { |seq| seq.has_uri?(uri) }
end
def initialize(name, *args, &proc)
options = args.extract_options!
@name = name
@proc = proc
@aliases = options.fetch(:aliases, []).map(&:to_sym)
@uri_manager = FactoryBot::UriManager.new(names, paths: options[:uri_paths])
@value = args.first || 1
unless @value.respond_to?(:peek)
@value = EnumeratorAdapter.new(@value)
end
end
def next(scope = nil)
if @proc && scope
scope.instance_exec(value, &@proc)
elsif @proc
@proc.call(value)
else
value
end
ensure
increment_value
end
def names
[@name] + @aliases
end
def has_name?(test_name)
names.include?(test_name.to_sym)
end
def has_uri?(uri)
uri_manager.include?(uri)
end
def for_factory?(test_factory_name)
FactoryBot::Internal.factory_by_name(factory_name).names.include?(test_factory_name.to_sym)
end
def rewind
@value.rewind
end
##
# If it's an Integer based sequence, set the new value directly,
# else rewind and seek from the beginning until a match is found.
#
def set_value(new_value)
if can_set_value_directly?(new_value)
@value.set_value(new_value)
elsif can_set_value_by_index?
set_value_by_index(new_value)
else
seek_value(new_value)
end
end
protected
attr_reader :proc
private
def value
@value.peek
end
def increment_value
@value.next
end
def can_set_value_by_index?
@value.respond_to?(:find_index)
end
##
# Set to the given value, or fail if not found
#
def set_value_by_index(value)
index = @value.find_index(value) || fail_value_not_found(value)
@value.rewind
index.times { @value.next }
end
##
# Rewind index and seek until the value is found or the max attempts
# have been tried. If not found, the sequence is rewound to its original value
#
def seek_value(value)
original_value = @value.peek
# rewind and search for the new value
@value.rewind
Timeout.timeout(FactoryBot.sequence_setting_timeout) do
loop do
return if @value.peek == value
increment_value
end
# loop auto-recues a StopIteration error, so if we
# reached this point, re-raise it now
fail StopIteration
end
rescue Timeout::Error, StopIteration
reset_original_value(original_value)
fail_value_not_found(value)
end
def reset_original_value(original_value)
@value.rewind
until @value.peek == original_value
increment_value
end
end
def can_set_value_directly?(value)
return false unless value.is_a?(Integer)
return false unless @value.is_a?(EnumeratorAdapter)
@value.integer_value?
end
def fail_value_not_found(value)
fail ArgumentError, "Unable to find '#{value}' in the sequence."
end
class EnumeratorAdapter
def initialize(initial_value)
@initial_value = initial_value
end
def peek
value
end
def next
@value = value.next
end
def rewind
@value = first_value
end
def set_value(new_value)
if new_value >= first_value
@value = new_value
else
fail ArgumentError, "Value cannot be less than: #{@first_value}"
end
end
def integer_value?
first_value.is_a?(Integer)
end
private
def first_value
@first_value ||= initial_value
end
def value
@value ||= initial_value
end
def initial_value
@value = @initial_value.respond_to?(:call) ? @initial_value.call : @initial_value
@first_value = @value
end
end
end
end
|
