added expected parameters list to _text_addressit

sanitizer/_text_addressit.js

@@ -35,9 +35,14 @@ function _sanitize( raw, clean ){
   return messages;
 }
 
+function _expected(){
+  return [{ name: 'text' }];
+}
+
 // export function
 module.exports = () => ({
-  sanitize: _sanitize
+  sanitize: _sanitize,
+  expected: _expected
 });
 
 // this is the addressit functionality from https://github.com/pelias/text-analyzer/blob/master/src/addressItParser.js

test/unit/sanitizer/_text_addressit.js

@@ -339,6 +339,12 @@ module.exports.tests.text_parser = function(test, common) {
 
   });
 
+  test('return an array of valid parameters in object form for Joi schema validation', (t) => {
+    const expected = [{ name: 'text' }];
+    const validParameters = sanitizer.expected();
+    t.deepEquals(validParameters, expected);
+    t.end();
+  });
 };
 
 module.exports.all = function (tape, common) {