Added ajvOptionsOverrides to support user-provided AJV options overri…

…ding

- Updated `CustomValidatorOptionsType` to add `ajvOptionsOverrides`
- Updated the `createAjvInstance()` function to spread any `ajvOptionsOverrides` on top of the `AJV_CONFIG`
- Updated `AJV6Validator` constructor to pass `ajvOptionsOverrides` to `createAjvInstance()`
- Updated tests to add test-case for the `$data` flag mentioned in #1668

packages/validator-ajv6/src/createAjvInstance.ts

@@ -16,15 +16,18 @@ export const DATA_URL_FORMAT_REGEX = /^data:([a-z]+\/[a-z0-9-+.]+)?;(?:name=(.*)
 /** Creates an Ajv version 6 implementation object with standard support for the 'color` and `data-url` custom formats.
  * If `additionalMetaSchemas` are provided then the Ajv instance is modified to add each of the meta schemas in the
  * list. If `customFormats` are provided then those additional formats are added to the list of supported formats.
+ * TBD
  *
  * @param [additionalMetaSchemas] - The list of additional meta schemas that the validator can access
  * @param [customFormats] - The set of additional custom formats that the validator will support
+ * @param [validatorConfigOverrides] - The set of validator config override options
  */
 export default function createAjvInstance(
   additionalMetaSchemas?: CustomValidatorOptionsType['additionalMetaSchemas'],
   customFormats?: CustomValidatorOptionsType['customFormats'],
+  validatorConfigOverrides: CustomValidatorOptionsType['validatorConfigOverrides'] = {},
 ) {
-  const ajv = new Ajv(AJV_CONFIG);
+  const ajv = new Ajv({ ...AJV_CONFIG, ...validatorConfigOverrides });
 
   // add custom formats
   ajv.addFormat('data-url', DATA_URL_FORMAT_REGEX);

packages/validator-ajv6/src/types.ts

@@ -1,8 +1,12 @@
+import { Options } from 'ajv';
+
 /** The type describing how to customize the AJV6 validator
  */
 export interface CustomValidatorOptionsType {
   /** The list of additional meta schemas that the validator can access */
   additionalMetaSchemas?: ReadonlyArray<object>;
   /** The set of additional custom formats that the validator will support */
   customFormats?: { [k: string]: string | RegExp | ((data: string) => boolean) };
+  /** The set of config overrides that will be passed to the AJV validator constructor on top of the defaults */
+  validatorConfigOverrides?: Options;
 }

packages/validator-ajv6/src/validator.ts

@@ -37,8 +37,8 @@ export default class AJV6Validator<T = any> implements ValidatorType<T> {
    * @param options - The `CustomValidatorOptionsType` options that are used to create the AJV instance
    */
   constructor (options: CustomValidatorOptionsType) {
-    const { additionalMetaSchemas, customFormats } = options;
-    this.ajv = createAjvInstance(additionalMetaSchemas, customFormats);
+    const { additionalMetaSchemas, customFormats, validatorConfigOverrides } = options;
+    this.ajv = createAjvInstance(additionalMetaSchemas, customFormats, validatorConfigOverrides);
   }
 
   /** Transforms a ajv validation errors list: