Ruby module (rspec) to count and assert number of mongo queries
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
# Examples: | |
# | |
# expect { code }.to change { finds("users") }.by(3) | |
# expect { code }.to change { updates("contents") }.by(1) | |
# expect { code }.not_to change { inserts } | |
# | |
# MongoSpy.flush | |
# ..code.. | |
# expect(MongoSpy.queries).to match( | |
# "find" => { "users" => 1, "contents" => 1 }, | |
# "update" => { "users" => 1 } | |
# ) | |
# | |
# Reset numbers in a test or before(:each) (optional): | |
# | |
# MongoSpy.flush | |
# | |
# View all numbers during a test: | |
# | |
# pp MongoSpy.queries | |
# | |
module MongoSpy | |
module Helpers | |
%w(find delete insert update).each do |op| | |
define_method(op.pluralize) { |ns = nil| | |
ns ? MongoSpy.queries[op][ns] : MongoSpy.queries[op].values.sum | |
} | |
end | |
end | |
class << self | |
def queries | |
@queries ||= Hash.new { |h, k| h[k] = Hash.new(0) } | |
end | |
def flush | |
@queries = nil | |
end | |
def started(event) | |
op = event.command.keys.first # find, update, delete, createIndexes, etc. | |
ns = event.command[op] # collection name | |
return unless ns.is_a?(String) | |
queries[op][ns] += 1 | |
end | |
def succeeded(_); end | |
def failed(_); end | |
end | |
end | |
Mongo::Monitoring::Global.subscribe(Mongo::Monitoring::COMMAND, MongoSpy) | |
RSpec.configure do |config| | |
config.include MongoSpy::Helpers | |
end |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment