API Blueprint testing tool

npm install dredd
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Dredd—API Blueprint Testing Tool

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Dredd is a command-line tool for testing API documentation written in API Blueprint format against its backend implementation. With Dredd you can easily plug your API documentation into the Continous Integration system like Travis CI or Jenkins and have API documentation up-to-date, all the time. Dredd uses the Gavel for judging if a particular API response is valid or if is not. If you are curious about how decisions are made, please refer to Gavel's behavior specification.

Dredd API Blueprint testing tool

Get Started Testing Your API

$ dredd blueprint.md http://api.myservice.tld

See dredd-example repo for real-life example.


Node.js and NPM is required.

$ npm install -g dredd

Command Line Options

$ dredd --help
  dredd <path to blueprint> <api_endpoint> [OPTIONS]

  dredd ./apiary.md http://localhost:3000 --dry-run

  --hookfiles, -f      Specifes a pattern to match files with before/after
                       hooks for running tests                   [default: null]
  --names, -n          Only list names of requests (for use in a hookfile). No
                       requests are made.                       [default: false]
  --reporter, -r       Output additional report format. This option can be used
                       multiple times to add multiple reporters. Options:
                       junit, nyan, dot, markdown, html.
                                                                   [default: []]
  --output, -o         Specifies output file when using additional file-based
                       reporter. This option can be used multiple times if
                       multiple file-based reporters are used.
                                                                   [default: []]
  --header, -h         Extra header to include in every request. This option
                       can be used multiple times to add multiple headers.
                                                                   [default: []]
  --sorted, -s         Sorts requests in a sensible way so that objects are not
                       modified before they are created. Order: CONNECT,
                       OPTIONS, POST, GET, HEAD, PUT, PATCH, DELETE, TRACE.
                                                                [default: false]
  --user, -u           Basic Auth credentials in the form username:password.
                                                                 [default: null]
  --inline-errors, -e  Determines whether failures and errors are displayed as
                       they occur (true) or agregated and displayed at the end
                                                                [default: false]
  --details, -d        Determines whether request/response details are included
                       in passing tests.
                                                                [default: false]
  --method, -m         Restrict tests to a particular HTTP method (GET, PUT,
                       POST, DELETE, PATCH). This option can be used multiple
                       times to allow multiple methods.
                                                                   [default: []]
  --color, -c          Determines whether console output should include colors.
                                                                 [default: true]
  --level, -l          The level of logging to output. Options: silly, debug,
                       verbose, info, warn, error.
                                                               [default: "info"]
  --timestamp, -t      Determines whether console output should include
                                                                [default: false]
  --help               Show usage information.
  --version            Show version number.

Additionally, boolean flags can be negated by prefixing no-, for example: --no-color --no-inline-errors.

Dredd can be configured to use hookfiles to do basic setup/teardown between tests. See the wiki article on writing hooks for more details.

API Blueprint Testability

Dredd can test only API resources specified by well defined transaction. Any Non specific resources in the Blueprint e. g. with URI template or query parameters without default or example values are considered as ambiguous transaction thus they are resulting in a warning during the test run and are skipped.

To learn more about the future of API Blueprint & Testing visit apiaryio/api-blueprint#21.


Any contribution is more then welcome! Let's start with creating your own virtual development environment, then fork, write tests, write clean, readable code which communicate, use scripts/bdd, keep the test coverage and create a pull request. :)

Make sure to follow Dredd issues page.

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