invalid value for patternproperties are validated by ajv (#576)

Author: Uzlopak

index.js

@@ -258,13 +258,6 @@ function buildExtraObjectPropertiesSerializer (location) {
     for (const propertyKey in patternPropertiesSchema) {
       const propertyLocation = patternPropertiesLocation.getPropertyLocation(propertyKey)
 
-      try {
-        RegExp(propertyKey)
-      } catch (err) {
-        const jsonPointer = propertyLocation.getSchemaRef()
-        throw new Error(`${err.message}. Invalid pattern property regexp key ${propertyKey} at ${jsonPointer}`)
-      }
-
       code += `
         if (/${propertyKey.replace(/\\*\//g, '\\/')}/.test(key)) {
           ${addComma}

test/patternProperties.test.js

@@ -148,3 +148,21 @@ test('patternProperties - array coerce', (t) => {
   const incoercibleValues = { foo: 'true', ofoo: 0, objfoo: { tyrion: 'lannister' } }
   t.throws(() => stringify(incoercibleValues))
 })
+
+test('patternProperties - fail on invalid regex, handled by ajv', (t) => {
+  t.plan(1)
+
+  t.throws(() => build({
+    title: 'check array coerce',
+    type: 'object',
+    properties: {},
+    patternProperties: {
+      'foo/\\': {
+        type: 'array',
+        items: {
+          type: 'string'
+        }
+      }
+    }
+  }), new Error('schema is invalid: data/patternProperties must match format "regex"'))
+})