AsyncAPI validation

Message validation package for YAML and JSON AsyncAPI documents.

This package:

• Load and parse your AsyncAPI documents from a file, an url or an in-line schema
• Support AsyncAPI documents v2.x.x and v3.x.x
• Support both YAML and JSON documents

Installation

# NPM
npm install asyncapi-validation
# Yarn
yarn add asyncapi-validation
# PNPM
pnpm install asyncapi-validation

Usage

Parsing Functions

fromFile(path) ⇒ Promise.<ValidationFunction>

Parses an AsyncAPI schema from a file and returns a validation function.

fromUrl(url) ⇒ Promise.<ValidationFunction>

Parses an AsyncAPI schema from a URL and returns a validation function.

fromSchema(schema) ⇒ Promise.<ValidationFunction>

Parses an AsyncAPI schema from a string and returns a validation function.

fromFile(path) ⇒ Promise.<ValidationFunction>

Parses an AsyncAPI schema from a file and returns a validation function.

Kind: global function Returns: Promise.<ValidationFunction> - A promise that resolves to the validation function. Throws:

• AsyncAPIParsingError if the schema is not valid or has governance issues.

Param	Type	Description
path	string	The path to the AsyncAPI schema file.

Example

const validator = await asyncApiValidation.parseFromFile('path/to/schema.yaml');
validator('messageKey', { foo: 'bar' });

fromUrl(url) ⇒ Promise.<ValidationFunction>

Parses an AsyncAPI schema from a URL and returns a validation function.

Kind: global function Returns: Promise.<ValidationFunction> - A promise that resolves to the validation function. Throws:

• AsyncAPIParsingError if the schema is not valid or has governance issues.

Param	Type	Description
url	string	The URL of the AsyncAPI schema.

Example

const validator = await asyncApiValidation.fromUrl(
  'https://example.org/schema.yaml'
);
validator('messageKey', { foo: 'bar' });

fromSchema(schema) ⇒ Promise.<ValidationFunction>

Parses an AsyncAPI schema from a string and returns a validation function.

Kind: global function Returns: Promise.<ValidationFunction> - A promise that resolves to the validation function. Throws:

• AsyncAPIParsingError if the schema is not valid or has governance issues.

Param	Type	Description
schema	string	The AsyncAPI schema as a string.

Example

const validator = await asyncApiValidation.fromSchema('asyncapi: 2.0.0');
validator('messageKey', { foo: 'bar' });

Validator Function

validate(schema) ⇒ ValidationFunction

Validates the provided AsyncAPI schema and returns a validation function.

Kind: global function Returns: ValidationFunction - The validation function.

Param	Type	Description
schema	ParseOutput	The parsed AsyncAPI schema.

validate~validatorFunction(key, payload) ⇒ boolean

Validates the provided payload against the AsyncAPI schema.

Kind: inner method of validate Returns: boolean - true if the payload is valid. Throws:

• Error if no messages are found for the given key.
• AsyncAPIValidationError if the payload fails validation.

Param	Type	Description
key	string	The key of the message to validate.
payload	unknown	The payload to validate.

Example

const validator = await asyncApiValidation.fromSchema('asyncapi: 2.0.0');
validator('messageKey', { foo: 'bar' });

Errors

AsyncAPIParsingError

Represents an error that occurs during the parsing of an AsyncAPI document.

Kind: global class

new AsyncAPIParsingError(message, [errors])

Represents an error that occurs during the parsing of an AsyncAPI document.

Param	Type	Description
message	string	The error message.
[errors]	Array.<Diagnostic>	Optional array of diagnostic errors associated with the parsing error.

AsyncAPIValidationError

Represents an error that occurs during AsyncAPI validation.

Kind: global class

new AsyncAPIValidationError(message, key, [errors])

Represents an error that occurs during AsyncAPI validation.

Param	Type	Description
message	string	The error message.
key	string	The key associated with the error.
[errors]	Array.<ErrorObject> | null	The array of validation error objects.