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require 'stringio'
require 'kramdown'
describe "README.md code snippet" do
let(:code_blocks) do
markdown = File.read(File.expand_path(File.dirname(__FILE__) + '/../README.md'))
parse_ruby_from(markdown)
end
it "executes with the expected output" do
code, output = *code_blocks
expect(execute_ruby(code)).to eq output
end
def execute_ruby(code)
capture_stdout do
eval code, binding
end
end
def parse_ruby_from(markdown)
code_blocks = Kramdown::Parser::GFM.parse(markdown).first.children.select { |e| e.type == :codeblock }.map(&:value)
expect(code_blocks).not_to be_empty
code_blocks
end
def capture_stdout
original = $stdout
$stdout = StringIO.new
yield
result = $stdout.string
$stdout = original
result
end
end
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