mongo-ruby-driver/tests/test_round_trip.rb

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HERE = File.dirname(__FILE__)
$LOAD_PATH[0,0] = File.join(HERE, '..', 'lib')
require 'mongo'
require 'mongo/util/xml_to_ruby'
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require 'test/unit'
# For each xml/bson file in the data subdirectory, we turn the XML into an
# OrderedHash and then test both Ruby-to-BSON and BSON-to-Ruby translations.
#
# There is a whole other project that includes similar tests
# (http://github.com/mongodb/mongo-qa). If the directory ../../mongo-qa
# exists, (that is, the top-level dir of mongo-qa is next to the top-level dir
# of this project), then we find the BSON test files there and use those, too.
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class RoundTripTest < Test::Unit::TestCase
include XGen::Mongo::Driver
@@ruby = nil
def setup
unless @@ruby
names = Dir[File.join(HERE, 'data', '*.xml')].collect {|f| File.basename(f).sub(/\.xml$/, '') }
@@ruby = {}
names.each { |name|
File.open(File.join(HERE, 'data', "#{name}.xml")) { |f|
@@ruby[name] = XMLToRuby.new.xml_to_ruby(f)
}
}
end
end
def test_dummy
assert true
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end
def self.create_test_for_round_trip_files_in_dir(dir)
names = Dir[File.join(dir, '*.xson')].collect {|f| File.basename(f).sub(/\.xson$/, '') }
names.each { |name|
eval <<EOS
def test_#{name}_#{dir.gsub(/[^a-zA-Z0-9_]/, '_')}
one_round_trip("#{dir}", "#{name}")
end
EOS
}
end
# Dynamically generate one test for each test file. This way, if one test
# fails the others will still run.
create_test_for_round_trip_files_in_dir(File.join(HERE, 'data'))
mongo_qa_dir = File.join(HERE, '../..', 'mongo-qa/modules/bson_tests/tests')
if File.exist?(mongo_qa_dir)
%w(basic_types complex single_types).each { |subdir_name|
create_test_for_round_trip_files_in_dir(File.join(mongo_qa_dir, subdir_name))
}
end
# Round-trip comparisons of Ruby-to-BSON and back.
# * Take the objects that were read from XML
# * Turn them into BSON bytes
# * Compare that with the BSON files we have
# * Turn those BSON bytes back in to Ruby objects
# * Turn them back into BSON bytes
# * Compare that with the BSON files we have (or the bytes that were already
# generated)
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def one_round_trip(dir, name)
obj = File.open(File.join(dir, "#{name}.xson")) { |f|
XMLToRuby.new.xml_to_ruby(f)
}
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File.open(File.join(dir, "#{name}.bson"), 'r') { |f|
# Read the BSON from the file
bson = f.read
bson = if RUBY_VERSION >= '1.9'
bson.bytes.to_a
else
bson.split(//).collect { |c| c[0] }
end
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# Turn the Ruby object into BSON bytes and compare with the BSON bytes
# from the file.
bson_from_ruby = BSON.new.serialize(obj).to_a
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begin
assert_equal bson.length, bson_from_ruby.length
assert_equal bson, bson_from_ruby
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rescue => ex
# File.open(File.join(dir, "#{name}_out_a.bson"), 'wb') { |f| # DEBUG
# bson_from_ruby.each { |b| f.putc(b) }
# }
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raise ex
end
# Turn those BSON bytes back into a Ruby object.
#
# We're passing a nil db to the contructor here, but that's OK because
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# the BSON DBFef bytes don't contain the db object in any case, and we
# don't care what the database is.
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obj_from_bson = BSON.new(nil).deserialize(ByteBuffer.new(bson_from_ruby))
assert_kind_of OrderedHash, obj_from_bson
# Turn that Ruby object into BSON and compare it to the original BSON
# bytes.
bson_from_ruby = BSON.new.serialize(obj_from_bson).to_a
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begin
assert_equal bson.length, bson_from_ruby.length
assert_equal bson, bson_from_ruby
rescue => ex
# File.open(File.join(dir, "#{name}_out_b.bson"), 'wb') { |f| # DEBUG
# bson_from_ruby.each { |b| f.putc(b) }
# }
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raise ex
end
}
end
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end