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require "multi_json"
module JsonSpec
module Helpers
extend self
def parse_json(json, path = nil)
ruby = MultiJson.decode("[#{json}]").first
value_at_json_path(ruby, path)
rescue MultiJson::DecodeError
MultiJson.decode(json)
end
def normalize_json(json, path = nil)
ruby = parse_json(json, path)
generate_normalized_json(ruby)
end
def generate_normalized_json(ruby)
case ruby
when Hash, Array then JSON.pretty_generate(ruby)
else ruby.to_json
end
end
def load_json(relative_path)
missing_json_directory! if JsonSpec.directory.nil?
path = File.join(JsonSpec.directory, relative_path)
missing_json_file!(path) unless File.exist?(path)
File.read(path)
end
private
def value_at_json_path(ruby, path)
return ruby unless path
path.split("/").inject(ruby) do |value, key|
case value
when Hash
value.fetch(key){ missing_json_path!(path) }
when Array
missing_json_path!(path) unless key =~ /^\d+$/
value.fetch(key.to_i){ missing_json_path!(path) }
else
missing_json_path!(path)
end
end
end
def missing_json_path!(path)
raise JsonSpec::MissingPath.new(path)
end
def missing_json_directory!
raise JsonSpec::MissingDirectory
end
def missing_json_file!(path)
raise JsonSpec::MissingFile.new(path)
end
end
end
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