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https://github.com/inspec/inspec
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12fec238f7
When the JSON resource (and those that subclass off of it) were modified to properly throw exceptions in the event of failure, this caused the `params` method to return nil instead of what it used to be, an empty hash. This is fine in the case of a describe block, but it's not okay when used outside of a describe, as it will cause users trying to pluck from the hash to throw a dreaded-and-unhelpful NilClass error. This change pre-populates the params to be an empty hash, and if the read/parse steps fail, it will still be one. Signed-off-by: Adam Leff <adam@leff.co>
115 lines
3.7 KiB
Ruby
115 lines
3.7 KiB
Ruby
# encoding: utf-8
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# author: Christoph Hartmann
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# author: Dominik Richter
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require 'utils/object_traversal'
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module Inspec::Resources
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class JsonConfig < Inspec.resource(1)
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name 'json'
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desc 'Use the json InSpec audit resource to test data in a JSON file.'
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example "
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describe json('policyfile.lock.json') do
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its(['cookbook_locks','omnibus','version']) { should eq('2.2.0') }
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end
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describe json({ command: 'retrieve_data.py --json' }) do
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its('state') { should eq('open') }
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end
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describe json({ content: '{\"item1\": { \"status\": \"available\" } }' }) do
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its(['item1', 'status']) { should cmp 'available' }
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end
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"
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include ObjectTraverser
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# make params readable
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attr_reader :params, :raw_content
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def initialize(opts)
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# pre-initialize @params to an empty hash. In the event that reading/parsing the data
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# throws an exception, this allows the resource to still be called outside of a
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# describe/test and not throw errors when a caller attempts to fetch a value from the params.
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@params = {}
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# load the raw content from the source, and then parse it
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@raw_content = load_raw_content(opts)
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@params = parse(@raw_content)
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end
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# Shorthand to retrieve a parameter name via `#its`.
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# Example: describe json('file') { its('paramX') { should eq 'Y' } }
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#
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# @param [String] name name of the field to retrieve
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# @return [Object] the value stored at this position
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def method_missing(*keys)
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# catch bahavior of rspec its implementation
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# @see https://github.com/rspec/rspec-its/blob/master/lib/rspec/its.rb#L110
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keys.shift if keys.is_a?(Array) && keys[0] == :[]
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value(keys)
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end
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def value(key)
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# uses ObjectTraverser.extract_value to walk the hash looking for the key,
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# which may be an Array of keys for a nested Hash.
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extract_value(key, params)
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end
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def to_s
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"#{resource_base_name} #{@resource_name_supplement || 'content'}"
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end
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private
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def parse(content)
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require 'json'
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JSON.parse(content)
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rescue => e
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raise Inspec::Exceptions::ResourceFailed, "Unable to parse JSON: #{e.message}"
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end
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def load_raw_content(opts)
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# if the opts isn't a hash, we assume it's a path to a file
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unless opts.is_a?(Hash)
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@resource_name_supplement = opts
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return load_raw_from_file(opts)
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end
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if opts.key?(:command)
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@resource_name_supplement = "from command: #{opts[:command]}"
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load_raw_from_command(opts[:command])
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elsif opts.key?(:content)
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opts[:content]
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else
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raise Inspec::Exceptions::ResourceFailed, 'No JSON content; must specify a file, command, or raw JSON content'
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end
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end
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def load_raw_from_file(path)
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file = inspec.file(path)
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# these are currently ResourceSkipped to maintain consistency with the resource
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# pre-refactor (which used skip_resource). These should likely be changed to
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# ResourceFailed during a major version bump.
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raise Inspec::Exceptions::ResourceSkipped, "No such file: #{path}" unless file.file?
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raise Inspec::Exceptions::ResourceSkipped, "File #{path} is empty or is not readable by current user" if file.content.nil? || file.content.empty?
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file.content
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end
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def load_raw_from_command(command)
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command_output = inspec.command(command).stdout
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raise Inspec::Exceptions::ResourceSkipped, "No output from command: #{command}" if command_output.nil? || command_output.empty?
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command_output
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end
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# for resources the subclass JsonConfig, this allows specification of the resource
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# base name in each subclass so we can build a good to_s method
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def resource_base_name
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'JSON'
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end
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end
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end
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