How to use violation method of io.kotest.assertions.json.schema.matchSchema class

Best Kotest code snippet using io.kotest.assertions.json.schema.matchSchema.violation

matchSchema.kt

Source:matchSchema.kt

...45         { "expected null to match schema: " },46         { "expected not to match schema, but null matched JsonNull schema" }47      )48      val tree = toJsonTree(value)49      val violations = validate("$", tree.root, schema.root)50      return MatcherResult(51         violations.isEmpty(),52         { violations.joinToString(separator = "\n") { "${it.path} => ${it.message}" } },53         { "Expected some violation against JSON schema, but everything matched" }54      )55   }56}57@ExperimentalKotest58private fun validate(59   currentPath: String,60   tree: JsonNode,61   expected: JsonSchemaElement,62): List<SchemaViolation> {63   fun propertyViolation(propertyName: String, message: String) =64      listOf(SchemaViolation("$currentPath.$propertyName", message))65   fun violation(message: String) =66      listOf(SchemaViolation(currentPath, message))67   return when (tree) {68      is JsonNode.ArrayNode -> {69         if (expected is JsonSchema.JsonArray)70            tree.elements.flatMapIndexed { i, node ->71               validate("$currentPath[$i]", node, expected.elementType)72            }73         else violation("Expected ${expected.typeName()}, but was array")74      }75      is JsonNode.ObjectNode -> {76         if (expected is JsonSchema.JsonObject) {77            val extraKeyViolations =78               if (!expected.additionalProperties)79                  tree.elements.keys80                     .filterNot { it in expected.properties.keys }81                     .flatMap {82                        propertyViolation(it, "Key undefined in schema, and schema is set to disallow extra keys")83                     }84               else emptyList()85            extraKeyViolations + expected.properties.flatMap { (propertyName, schema) ->86               val actual = tree.elements[propertyName]87               if (actual == null) {88                  if (expected.requiredProperties.contains(propertyName)) {89                     propertyViolation(propertyName, "Expected ${schema.typeName()}, but was undefined")90                  } else {91                     emptyList()92                  }93               } else validate("$currentPath.$propertyName", actual, schema)94            }95         } else violation("Expected ${expected.typeName()}, but was object")96      }97      is JsonNode.NullNode -> TODO("Check how Json schema handles null")98      is JsonNode.NumberNode ->99         when (expected) {100            is JsonSchema.JsonInteger -> {101               if (tree.content.contains(".")) violation("Expected integer, but was number")102               else expected.matcher?.let {103                  val matcherResult = it.test(tree.content.toLong())104                  if (matcherResult.passed()) emptyList() else violation(matcherResult.failureMessage())105               } ?: emptyList()106            }107            is JsonSchema.JsonDecimal -> {108               expected.matcher?.let {109                  val matcherResult = it.test(tree.content.toDouble())110                  if (matcherResult.passed()) emptyList() else violation(matcherResult.failureMessage())111               } ?: emptyList()112            }113            else -> violation("Expected ${expected.typeName()}, but was ${tree.type()}")114         }115      is JsonNode.StringNode ->116         if (expected is JsonSchema.JsonString) {117            expected.matcher?.let {118               val matcherResult = it.test(tree.value)119               if (matcherResult.passed()) emptyList() else violation(matcherResult.failureMessage())120            } ?: emptyList()121         } else violation("Expected ${expected.typeName()}, but was ${tree.type()}")122      is JsonNode.BooleanNode ->123         if (!isCompatible(tree, expected))124            violation("Expected ${expected.typeName()}, but was ${tree.type()}")125         else emptyList()126   }127}128private class SchemaViolation(129   val path: String,130   message: String,131   cause: Throwable? = null132) : RuntimeException(message, cause)133private fun isCompatible(actual: JsonNode, schema: JsonSchemaElement) =134   (actual is JsonNode.BooleanNode && schema is JsonSchema.JsonBoolean) ||135      (actual is JsonNode.StringNode && schema is JsonSchema.JsonString) ||136      (actual is JsonNode.NumberNode && schema is JsonSchema.JsonNumber)...

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