From e2df4b355ba97e4212f5e42251defe8d9e432763 Mon Sep 17 00:00:00 2001
From: Fabio Berger <me@fabioberger.com>
Date: Tue, 8 Jan 2019 17:07:10 +0100
Subject: Add assertions to catch trying to add undefined schemas

---
 packages/json-schemas/src/schema_validator.ts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/packages/json-schemas/src/schema_validator.ts b/packages/json-schemas/src/schema_validator.ts
index 3f303137b..6ccd981be 100644
--- a/packages/json-schemas/src/schema_validator.ts
+++ b/packages/json-schemas/src/schema_validator.ts
@@ -8,12 +8,18 @@ import { schemas } from './schemas';
  */
 export class SchemaValidator {
     private readonly _validator: Validator;
+    private static _assertSchemaNotUndefined(schema: Schema): void {
+        if (schema === undefined) {
+            throw new Error(`Cannot add undefined schema`);
+        }
+    }
     /**
      * Instantiates a SchemaValidator instance
      */
     constructor() {
         this._validator = new Validator();
         for (const schema of values(schemas)) {
+            SchemaValidator._assertSchemaNotUndefined(schema);
             this._validator.addSchema(schema, schema.id);
         }
     }
@@ -24,6 +30,7 @@ export class SchemaValidator {
      * @param schema The schema to add
      */
     public addSchema(schema: Schema): void {
+        SchemaValidator._assertSchemaNotUndefined(schema);
         this._validator.addSchema(schema, schema.id);
     }
     // In order to validate a complex JS object using jsonschema, we must replace any complex
@@ -37,6 +44,8 @@ export class SchemaValidator {
      * @returns The results of the validation
      */
     public validate(instance: any, schema: Schema): ValidatorResult {
+        console.log('validating....');
+        SchemaValidator._assertSchemaNotUndefined(schema);
         const jsonSchemaCompatibleObject = JSON.parse(JSON.stringify(instance));
         return this._validator.validate(jsonSchemaCompatibleObject, schema);
     }
-- 
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