triples_create_test.rb

# test/lib/triples_create_test.rb
require 'test_helper'

# assert_nil
# assert_equal
#
# http://guides.rubyonrails.org/testing.html

class CreateTriple < ActiveSupport::TestCase

  setup do
		# require 'rake'
		@repo = Knowledge.new_repo
    ReFrame::Application.load_tasks
  end

  test "RDF Sanity Check" do
		begin
			@repo.clear!
			assert_equal @repo.count, 0

			# sql_repo    = RDF::DataObjects::Repository.new uri: 'postgres://postgres@server/database'

			# heroku_repo = RDF::DataObjects::Repository.new uri: ENV['DATABASE_URL']

			# mongo_repo  = …

			@repo.load('http://datagraph.org/jhacker/foaf.nt')

			# How many statements did we have?
			assert_equal @repo.count, 10
			#=> 10

			# Get the URI of the first subject
			# binding.pry
			jhacker = @repo.first.subject
			# p jhacker
			assert_equal jhacker, RDF::URI.new('http://datagraph.org/jhacker/foaf')

			# Delete everything to do with it
			jhacker_statements = @repo.query(subject: jhacker).entries
			# p jhacker_statements
			# [#<RDF::Statement:0x2af20a6a6504(<http://datagraph.org/jhacker/foaf> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://xmlns.com/foaf/0.1/PersonalProfileDocument> .)>, #<RDF::Statement:0x2af20bf25f6c(<http://datagraph.org/jhacker/foaf> <http://xmlns.com/foaf/0.1/maker> <http://datagraph.org/jhacker/#self> .)>, #<RDF::Statement:0x2af20a680fe8(<http://datagraph.org/jhacker/foaf> <http://xmlns.com/foaf/0.1/primaryTopic> <http://datagraph.org/jhacker/#self> .)>]

			@repo.delete *jhacker_statements
			assert_equal @repo.count, 7
			#=> 7

			# with Postgres, we could have done this, but SQLite gives us a locking error:
			# repo.delete(*repo.query(subject: jhacker))

			# Changed our mind--bring it back
			@repo.insert *jhacker_statements
			assert_equal @repo.count, 10

			@repo.clear!
			assert_equal @repo.count, 0
		rescue SocketError
			# https://stackoverflow.com/questions/2191632/begin-rescue-and-ensure-in-ruby
		rescue # $!
			puts $!.class
			puts $!
			puts $!.backtrace[0]
		end
  end

	# scenario (1)
	# 
	# remote – explicit (good)
	#
  test "remote – explicit (good)" do
		# https://stackoverflow.com/questions/31858964/invoke-rake-task-with-arguments-from-another-task
		Rake::Task['triples:create'].invoke('_', '<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>', '_')
		Rake::Task['triples:create'].reenable
  end

	# scenario (2)
	# 
	# remote – prefix
	#
  test "remote – prefix" do
		# https://stackoverflow.com/questions/31858964/invoke-rake-task-with-arguments-from-another-task
		Rake::Task['triples:create'].invoke('_', '<rdf:type>', '_')
		Rake::Task['triples:create'].reenable
	end

	# scenario (3)
	# 
	# remote – explicit (bad)
	#
  test "remote – explicit (bad)" do
		# https://stackoverflow.com/questions/31858964/invoke-rake-task-with-arguments-from-another-task
		assert_raises(RDF::ReaderError) do
			Rake::Task['triples:create'].invoke('_', '<http://www.w3.org#meh>', '_')
		end
		Rake::Task['triples:create'].reenable
	end

end