Even worse, if API response data changes, there’s no way for developers to learn what to expect from each request.Ī developer’s experience with an unfamiliar API is dictated by its documentation. New endpoints go undocumented, which unfortunately means they will never exist in the minds of most developers.
API documentation is easily neglected and becomes outdated.
It’s a chore to produce, especially when it exists as a task to be done separate from the original code creation. The challenge: Manually creating comprehensive and accurate documentation is difficult. HTTP API descriptions, like those described in the OpenAPI Specification, end up being helpful in a variety of ways for your development teams, but also your broader users.
How to Use OpenAPI and Swagger for Documentation (and More).In this guide, we explain Swagger and OpenAPI, how to create an OpenAPI or Swagger description for an API, and how to use the OpenAPI Specification to yield documentation that’s continuously up-to-date and automated! Visit the REST Assured web site for more info!Įxception in thread “main” .jsv.JsonSchemaValidationException: .JsonParseException: Unexpected character (‘c’ (code 99)): expected a valid value (number, String, array, object, ‘true’, ‘false’ or ‘null’)Īt .(JsonSchemaValidator.java:233)Īt .(JsonSchemaValidator.java:75)Īt (TypeSafeMatcher.java:65)Īt (MatcherAssert.java:12)Īt (MatcherAssert.java:8)Īt _Test1.checkJSONSchema(SocVue_Test1.java:77)Īt _Test1.main(SocVue_Test1.java:34)Ĭaused by: .JsonParseException: Unexpected character (‘c’ (code 99)): expected a valid value (number, String, array, object, ‘true’, ‘false’ or ‘null’)Īt .JsonParser._constructError(JsonParser.java:1369)Īt .base.ParserMinimalBase._reportError(ParserMinimalBase.java:532)Īt .base.ParserMinimalBase._reportUnexpectedChar(ParserMinimalBase.java:453)Īt .json.ReaderBasedJsonParser._handleUnexpectedValue(ReaderBasedJsonParser.java:1386)Īt .(ReaderBasedJsonParser.java:669)Īt .MappingIterator.hasNextValue(MappingIterator.java:159)Īt .JsonNodeReader.readNode(JsonNodeReader.java:142)Īt .omReader(JsonNodeReader.java:127)Īt .omReader(JsonLoader.java:179)Īt .omString(JsonLoader.java:192)Īt .(JsonSchemaValidator.Excellent API documentation experiences stem from proper use of an OpenAPI or Swagger API description file. Public class JsonSchemaValidatorWithoutRestAssuredTest public voidĪssertThat(json, matchesJsonSchemaInClasspath("greeting-schema.json")) As long as you have a JSON document represented as a String you can do like this: You can also use REST Assured’s json-schema-validator module without using REST Assured. But not to worry, REST Assured (thanks to Francis Galiegue’s library) supports both draft 3 and 4. If you’ve been paying close attention perhaps you saw that the greeter-schema.json that we used in the example was based on the JSON schema draft 3 and not the lastest (currently draft 4) version. ConclusionĪs you can see REST Assured makes it easy validate that a JSON response body conforms to a given JSON schema. For additional info on the json schema validation support in REST Assured visit the Usage Guide. The json-schema-validator module in REST Assured builds on top of the excellent json-schema-validator project by Francis Galiegue et al. Validate_car_records_response_conforms_to_the_expected_xsd() throws Exception test Import static .RestAssuredMatchers.matchesXsd You can validate this in REST Assured like this: Imagine also that you have an Xml Schema in classpath called car-records.xsd that the XML data must conform to:
XML Exampleįor example given that a service located at returns the following XML: Australia Production Pickup Truck with speed of 271kph Isle of Man Smallest Street-Legal Car at 99cm wide and 59 kg in weight France Most Valuable Car at $15 million Validating that the structure of the document is correct has also been easy when it comes to XML. Using REST Assured it has always been easy to validate that the API behaves correctly and returns the expected data values. When exposing REST or HTTP based service APIs it’s important to validate that the API behaves correctly and that the exposed data format is structured in an expected manner.