inspec/lib/resources/csv.rb
Adam Leff 4f2b66302d Fix ObjectTraverser when accessing array values
When attempting to access array values via the `json` resource:

```
describe json('/tmp/test.json') do
      its(['array',0]) { should eq "zero" }
end
```

... the resulting data would be an array of the size of the original array
with all the values replaced with nils:

```
     expected: "zero"
          got: [nil, nil, nil]
```

This was due to a bug in the ObjectTraverser mixin that mapped array values
back through `extract_value` rather than properly handling the passed-in
key(s). This worked fine for the specific data format created by the `csv`
resource but did not work `json` or any other resource that subclassed the
`JsonConfig` resource.

This change fixes the logic when dealing with an array when it's encountered,
and fixes up the `csv` resource with its own `value` method.

This change also adds tests for ObjectTraverser.

Signed-off-by: Adam Leff <adam@leff.co>
2017-03-15 11:35:55 +01:00

52 lines
1.6 KiB
Ruby

# encoding: utf-8
# author: Christoph Hartmann
# author: Dominik Richter
# Parses a csv document
# This implementation was inspired by a blog post
# @see http://technicalpickles.com/posts/parsing-csv-with-ruby
module Inspec::Resources
class CsvConfig < JsonConfig
name 'csv'
desc 'Use the csv InSpec audit resource to test configuration data in a CSV file.'
example "
describe csv('example.csv') do
its('name') { should eq(['John', 'Alice']) }
end
"
# override the parse method from JsonConfig
# Assuming a header row of name,col1,col2, it will output an array of hashes like so:
# [
# { 'name' => 'row1', 'col1' => 'value1', 'col2' => 'value2' },
# { 'name' => 'row2', 'col1' => 'value3', 'col2' => 'value4' }
# ]
def parse(content)
require 'csv'
# convert empty field to nil
CSV::Converters[:blank_to_nil] = lambda do |field|
field && field.empty? ? nil : field
end
# implicit conversion of values
csv = CSV.new(content, headers: true, converters: [:all, :blank_to_nil])
# convert to hash
csv.to_a.map(&:to_hash)
end
# override the value method from JsonConfig
# The format of the CSV hash as created by #parse is very different
# than what the YAML, JSON, and INI resources create, so using the
# #value method from JsonConfig (which uses ObjectTraverser.extract_value)
# doesn't make sense here.
def value(key)
@params.map { |x| x[key.first.to_s] }.compact
end
def to_s
"Csv #{@path}"
end
end
end