fix: create new ajv instance when additionalMetaSchemas prop is null, add tests

Author: epicfaace

src/validate.js

@@ -163,7 +163,7 @@ export default function validateFormData(
   schema,
   customValidate,
   transformErrors,
-  additionalMetaSchemas
+  additionalMetaSchemas = []
 ) {
   // add more schemas to validate against
   if (

test/Form_test.js

@@ -9,6 +9,7 @@ import {
   createComponent,
   createFormComponent,
   createSandbox,
+  setProps,
 } from "./test_utils";
 
 describe("Form", () => {
@@ -1977,4 +1978,42 @@ describe("Form", () => {
       expect(node.getAttribute("novalidate")).not.to.be.null;
     });
   });
+
+  describe("Meta schema updates", () => {
+    it("Should update allowed meta schemas when additionalMetaSchemas is changed", () => {
+      const formProps = {
+        liveValidate: true,
+        schema: {
+          $schema: "http://json-schema.org/draft-04/schema#",
+          type: "string",
+          minLength: 8,
+          pattern: "d+",
+        },
+        formData: "short",
+        additionalMetaSchemas: [],
+      };
+
+      const { comp } = createFormComponent(formProps);
+
+      expect(comp.state.errorSchema).eql({});
+
+      setProps(comp, {
+        ...formProps,
+        additionalMetaSchemas: [
+          require("ajv/lib/refs/json-schema-draft-04.json"),
+        ],
+      });
+
+      expect(comp.state.errorSchema).eql({
+        __errors: [
+          "should NOT be shorter than 8 characters",
+          'should match pattern "d+"',
+        ],
+      });
+
+      setProps(comp, formProps);
+
+      expect(comp.state.errorSchema).eql({});
+    });
+  });
 });