Fix mismatching name of types preference parameter

The parameter in clean.types being set by `helpers/text_parser.js` was
"from_address_parsing", but the code in `helper/types.js` was expecting
"from_address_parser". This commit makes both use "from_address_parser"
and adds a test.

sanitiser/_text.js

@@ -26,7 +26,7 @@ function sanitize( raw, clean ){
 
     // try to set layers from query parser results
     clean.types = clean.layers || {};
-    clean.types.from_address_parsing = text_parser.get_layers(clean.text);
+    clean.types.from_address_parser = text_parser.get_layers(clean.text);
   }
 
   return messages;

test/unit/run.js

@@ -29,6 +29,7 @@ var tests = [
   require('./sanitiser/_single_scalar_parameters'),
   require('./sanitiser/_size'),
   require('./sanitiser/_sources'),
+  require('./sanitiser/_text'),
   require('./sanitiser/autocomplete'),
   require('./sanitiser/place'),
   require('./sanitiser/reverse'),

test/unit/sanitiser/_text.js

@@ -0,0 +1,32 @@
+var sanitiser = require('../../../sanitiser/_text');
+var type_mapping = require('../../../helper/type_mapping');
+
+module.exports.tests = {};
+
+module.exports.tests.text_parser = function(test, common) {
+  test('short input text has admin layers set ', function(t) {
+    var raw = {
+      text: 'emp'  //start of empire state building
+    };
+    var clean = {
+    };
+
+    var messages = sanitiser(raw, clean);
+
+    t.deepEquals(messages.errors, [], 'no errors');
+    t.deepEquals(messages.warnings, [], 'no warnings');
+    t.equal(clean.types.from_address_parser, type_mapping.layer_with_aliases_to_type.coarse, 'coarse layers preferred');
+
+    t.end();
+  });
+};
+
+module.exports.all = function (tape, common) {
+  function test(name, testFunction) {
+    return tape('SANITISER _text: ' + name, testFunction);
+  }
+
+  for( var testCase in module.exports.tests ){
+    module.exports.tests[testCase](test, common);
+  }
+};