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# Copyright (C) 2014-2017 MongoDB, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
module Mongo
module CRUD
module Operation
# Defines common behaviour for running CRUD read operation tests
# on a collection.
#
# @since 2.0.0
class Read
# Map of method names to test operation argument names.
#
# @since 2.0.0
ARGUMENT_MAP = { :sort => 'sort',
:skip => 'skip',
:batch_size => 'batchSize',
:limit => 'limit',
:collation => 'collation'
}.freeze
# Map of read preference mode names to their equivalent Ruby-formatted symbols.
#
# @since 2.4.0
READ_PREFERENCE_MAP = { 'primary' => :primary,
'secondary' => :secondary,
'primaryPreferred' => :primary_preferred,
'secondaryPreferred' => :secondary_preferred,
'nearest' => :nearest
}.freeze
# The operation name.
#
# @return [ String ] name The operation name.
#
# @since 2.0.0
attr_reader :name
# Instantiate the operation.
#
# @return [ Hash ] spec The operation spec.
#
# @since 2.0.0
def initialize(spec)
@spec = spec
@name = spec['name']
end
# Execute the operation.
#
# @example Execute the operation.
# operation.execute
#
# @param [ Collection ] collection The collection to execute the operation on.
#
# @return [ Result, Array<Hash> ] The result of executing the operation.
#
# @since 2.0.0
def execute(collection)
send(name.to_sym, collection)
end
# Whether the operation is expected to have restuls.
#
# @example Whether the operation is expected to have results.
# operation.has_results?
#
# @return [ true, false ] If the operation is expected to have results.
#
# @since 2.0.0
def has_results?
!(name == 'aggregate' &&
pipeline.find {|op| op.keys.include?('$out') })
end
private
def count(collection)
options = ARGUMENT_MAP.reduce({}) do |opts, (key, value)|
opts.merge!(key => arguments[value]) if arguments[value]
opts
end
collection.count(filter, options)
end
def aggregate(collection)
collection.aggregate(pipeline, options).to_a
end
def distinct(collection)
collection.distinct(field_name, filter, options)
end
def find(collection)
opts = modifiers ? options.merge(modifiers: BSON::Document.new(modifiers)) : options
(read_preference ? collection.with(read: read_preference) : collection).find(filter, opts).to_a
end
def options
ARGUMENT_MAP.reduce({}) do |opts, (key, value)|
arguments[value] ? opts.merge!(key => arguments[value]) : opts
end
end
def collation
arguments['collation']
end
def batch_size
arguments['batchSize']
end
def filter
arguments['filter']
end
def pipeline
arguments['pipeline']
end
def modifiers
arguments['modifiers']
end
def field_name
arguments['fieldName']
end
def arguments
@spec['arguments']
end
def read_preference
if @spec['read_preference'] && @spec['read_preference']['mode']
{ mode: READ_PREFERENCE_MAP[@spec['read_preference']['mode']] }
end
end
end
end
end
end
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