README.md

json-schema-validation

Validate JSONs against json schemas

A fairly complete (not total) implementation of json schema spec

Can be trustely used in Prod, just check all keywords described in your schema are supported by this Lib.

Usage

    val jsonSchema =
    Json.parse(
      """
        {
          "$id": "https://example.com/person.schema.json",
          "$schema": "http://json-schema.org/draft-07/schema#",
          "title": "Person",
          "type": "object",
          "properties": {
            "firstName": {
              "type": "string",
              "description": "The person's first name."
            },
            "lastName": {
              "type": "string",
              "description": "The person's last name."
            },
            "age": {
              "description": "Age in years which must be equal to or greater than zero.",
              "type": "integer",
              "minimum": 0
            }
          },
          "required": ["lastName"]
        }
      """)
      
      val person =
      Json.parse(
        """{
           "firstName": "John",
           "age": -1
         }""")

    JsValidation.from(jsonSchema).appliedTo(person).matches {
      case AssertionSuccessfulResult(_) => fail()
      case AssertionFailureResult(errors) => errors should be(
        List(
          "Property Person.lastName is missing",
          "Person.age is smaller than required minimum value of 0"))
    }