Dredd Transactions

Dredd Transactions library compiles HTTP Transactions (simple Request-Response pairs) from API description document.

Note: To better understand emphasized terms in this documentation, please refer to the Glossary of Terms. All data structures are described using the MSON format.

This project supersedes Blueprint Transactions library.

Features

• Inherits parameters from parent Resource and Action sections.
• Expands URI Templates.
• Warns on undefined placeholders in URI Templates (both query and path).
• Validates URI parameter types.
• Selects first Request and first Response if multiple are specified in the API description document.

Deprecated Features

• Compiles Transaction Name string (vague identifier) for each Transaction.
• Provides Transaction Origin with pointers to API Elements derived from the original API description document.

Note: These features are to be superseded by so-called Transaction Path. Feel free to read and comment the proposal in apiaryio/dredd#227.

Installation

npm install dredd-transactions

Development

Dredd Transactions library is written in CoffeeScript language which compiles to JavaScript (ECMAScript 5).

Usage

compile

Compiles HTTP Transactions from given API description document.

var dt = require('dredd-transactions');

dt.compile('# My API\n...', 'apiary.apib', function (error, compilationResult) {
  // ...
});

Arguments

• (string) - API description document provided as string.
• (string) - Original file name of the API description document. Soon to be removed! See #6.
• (function) - Callback.

Callback Arguments

• (enum[null, object]) - Standard JavaScript error object.
• (Compilation Result)

Data Structures

Compilation Result (object)

Result of compilation. Alongside compiled Transaction objects contains also errors and warnings, mainly from API description parser.

• mediaType: text/vnd.apiblueprint (string, default, nullable) - Media type of the input format, defaults to API Blueprint format. Can be empty in case of some fatal errors.
• transactions (array[Transaction]) - Compiled HTTP Transactions.
• errors (array[Annotation]) - Errors which occurred during parsing of the API description or during compilation of transactions.
• warnings (array[Annotation]) - Warnings which occurred during parsing of the API description or during compilation of transactions.

Transaction (object)

Represents a single HTTP Transaction (Request-Response pair) and its location in the API description document. The location is provided in two forms, both deprecated as of now:

• name - String representation, both human- and machine-readable.
• origin - Object of references to nodes of API Elements derived from the original API description document.

Note: These two forms of locating HTTP Transactions are to be superseded by so-called Transaction Path. Feel free to read and comment the proposal in apiaryio/dredd#227.

Properties

• request (object) - HTTP Request as described in API description document.
  • method
  • uri: /message (string) - Informative URI of the Request.
  • headers (object)
  • body: Hello world!\n (string)
• response (object) - Expected HTTP Response as described in API description document.
  • status: 200 (string)
  • headers (object)
  • body (string)
  • schema (string)

Deprecated Properties

• name: Hello world! > Retrieve Message (string) - Transaction Name, non-deterministic breadcrumb location of the HTTP Transaction within the API description document.
• origin (object) - Object of references to nodes of API Elements derived from the original API description document.
  • filename: ./api-description.apib (string)
  • apiName: My Api (string)
  • resourceGroupName: Greetings (string)
  • resourceName: Hello, world! (string)
  • actionName: Retrieve Message (string)
  • exampleName: First example (string)

Note: These properties are to be superseded by so-called Transaction Path. Feel free to read and comment the proposal in apiaryio/dredd#227.

Annotation (object)

Description of an error or warning which occurred during parsing of the API description or during compilation of transactions.

Properties

• component (enum[string]) - In which component of the compilation process the annotation occurred.
  • apiDescriptionParser
  • parametersValidation
  • uriTemplateExpansion
• code (number) - Parser-specific code of the annotation.
• message (string) - Textual annotation. This is – in most cases – a human-readable message to be displayed to user.
• location (array) - Locations of the annotation in the source file. A series of character-blocks, which may be non-continuous. For further details refer to API Elements' Source Map element.
  • (array, fixed) - Continuous characters block. A pair of character index and character count.
    • (number) - Zero-based index of a character in the source document.
    • (number) - Count of characters starting from the character index.

Deprecated Properties

• origin (object) - Object of references to nodes of API Elements derived from the original API description document.
  • filename: ./api-description.apib (string)
  • apiName: My Api (string)
  • resourceGroupName: Greetings (string)
  • resourceName: Hello, world! (string)
  • actionName: Retrieve Message (string)
  • exampleName: First example (string)

Note: These properties are to be superseded by so-called Transaction Path. Feel free to read and comment the proposal in apiaryio/dredd#227.