openapi-examples-validator

Validates embedded JSON-examples in OpenAPI-specs (v2 and v3 are supported)

Prerequisites

• Node.js >=20.

Install

Install using npm:

npm install -g openapi-examples-validator

Usage

openapi-examples-validator [options] <filepath>
Validate embedded examples in OpenAPI-specs (JSON and YAML supported).
To validate external examples, use the `-s` and `-e` option.
To pass a mapping-file, to validate multiple external examples, use the `-m` option.
Options:
-V, --version output the version number
-s, --schema-jsonpath <schema-jsonpath> Path to OpenAPI-schema, to validate the example file against
-e, --example-filepath <example-filepath> file path to example file, to be validated
-m, --mapping-filepath <mapping-filepath> file path to map, containing schema-paths as key and the file-path(s) to
examples as value. If wildcards are used, the parameter has to be put in
quotes.
-c, --cwd-to-mapping-file changes to the directory of the mapping-file, before resolving the
example's paths. Use this option, if your mapping-files use relative paths
for the examples
-n, --no-additional-properties don't allow properties that are not described in the schema
-r, --all-properties-required make all the properties in the schema required
-o, --ignore-formats <ignored-formats...> Datatype formats to ignore (to prevent "unknown format" errors.)
-h, --help output usage information

The validator will search the OpenAPI-spec for response-examples and validate them against its schema.

If an external example has to be verified, the -s and -e option has to be used.

For example:

$ openapi-examples-validator -s $.paths./.get.responses.200.schema -e example.json openapi-spec.json

To validate multiple external examples, pass a mapping file with a similar structure along with the -m option:

{
"$.paths./.get.responses.200.schema": [
"test/data/external-examples-valid-example1.json",
"test/data/external-examples-valid-example2.json",
"test/data/external-examples-invalid-type.json"
],
"$.paths./.get.responses.300.schema": "test/data/external-examples-invalid-missing-link.json",
"$.paths./.post.parameters[?(@.in==="body")].schema": "test/data/v2/post-request/*.json"
}

It is possible to use wildcards in the command line to select multiple mapping files, and it is possible to use wildcards inside the mapping file to select multiple examples.

Errors will be written to stderr.

Sample output of validation errors:

[
{
"keyword": "type",
"instancePath": "/versions/0/id",
"schemaPath": "#/properties/versions/items/properties/id/type",
"params": {
"type": "string"
},
"message": "must be string",
"examplePath": "/~1/get/responses/200/examples/application~1json"
}
]

Docker

Example usage:

$ docker run --rm -i \
--user=$(id -u) \
-v ${PWD}:/data \
codekie/openapi-examples-validator:latest \
/data/test/data/v3/simple-api-with-examples-with-refs-invalid.yml

Caveat

• The formats int32, float and double are supported for the type number. The format int64 is only available for the type string, though (due to the precision-limitations of Javascript).
• The options --no-additional-properties and --all-properties-required are not compatible with sub-schemas combiner keyword. A warning will be logged if one model is skipped because it contains a combiner keyword.

Test

To run the tests, execute

npm test

or to check the coverage

npm run coverage