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-rw-r--r--packages/assert/src/index.ts4
1 files changed, 3 insertions, 1 deletions
diff --git a/packages/assert/src/index.ts b/packages/assert/src/index.ts
index 71f2cbeb2..4d090e493 100644
--- a/packages/assert/src/index.ts
+++ b/packages/assert/src/index.ts
@@ -68,7 +68,9 @@ export const assert = {
},
doesConformToSchema(variableName: string, value: any, schema: Schema, subSchemas?: Schema[]): void {
const schemaValidator = new SchemaValidator();
- _.map(subSchemas, schemaValidator.addSchema.bind(schemaValidator));
+ if (!_.isUndefined(subSchemas)) {
+ _.map(subSchemas, schemaValidator.addSchema.bind(schemaValidator));
+ }
const validationResult = schemaValidator.validate(value, schema);
const hasValidationErrors = validationResult.errors.length > 0;
const msg = `Expected ${variableName} to conform to schema ${schema.id}