feat(libpostal_patch): correctly parse australian-style unit numbers

controller/libpostal.js

@@ -157,6 +157,19 @@ function patchBuggyResponses(response){
     }
   }
 
+  // known bug where Australian unit numbers are incorrectly included in the house_number label
+  // note: in the case where a 'unit' label already exists, do nothing.
+  // https://github.com/pelias/pelias/issues/753
+  let unit = _.get(idx, 'unit');
+  let house_number = _.get(idx, 'house_number');
+  if( _.isPlainObject(house_number) && !_.isPlainObject(unit) && _.isString(house_number.value) ){
+    let split = _.trim(_.trim(house_number.value),'/').split('/');
+    if( split.length === 2 ){
+      response[house_number._pos].value = split[1]; // second part (house number)
+      response.push({ label: 'unit', value: split[0] }); // first part (unit number)
+    }
+  }
+
   return response;
 }
 

test/unit/controller/libpostal.js

@@ -396,6 +396,130 @@ module.exports.tests.bug_fixes = (test, common) => {
 
   });
 
+  test('bug fix: correctly parse australian-style unit numbers', t => {
+    const service = (req, callback) => {
+      const response = [
+        {
+          'label': 'house_number',
+          'value': '11/1015'
+        },
+        {
+          'label': 'road',
+          'value': 'nudgee road'
+        },
+        {
+          'label': 'suburb',
+          'value': 'banyo'
+        },
+        {
+          'label': 'postcode',
+          'value': '4014'
+        },
+        {
+          'label': 'state',
+          'value': 'qld'
+        }
+      ];
+
+      callback(null, response);
+    };
+
+    const controller = libpostal(service, () => true);
+
+    const req = {
+      clean: {
+        text: 'original query'
+      },
+      errors: []
+    };
+
+    controller(req, undefined, () => {
+      t.deepEquals(req, {
+        clean: {
+          text: 'original query',
+          parser: 'libpostal',
+          parsed_text: {
+            // unit: '11',
+            number: '1015',
+            street: 'nudgee road',
+            neighbourhood: 'banyo',
+            postalcode: '4014',
+            state: 'qld'
+          }
+        },
+        errors: []
+      }, 'req should not have been modified');
+
+      t.end();
+
+    });
+
+  });
+
+  test('bug fix: correctly parse australian-style unit numbers - no-op if "unit" already assigned', t => {
+    const service = (req, callback) => {
+      const response = [
+        {
+          'label': 'unit',
+          'value': '99'
+        },
+        {
+          'label': 'house_number',
+          'value': '11/1015'
+        },
+        {
+          'label': 'road',
+          'value': 'nudgee road'
+        },
+        {
+          'label': 'suburb',
+          'value': 'banyo'
+        },
+        {
+          'label': 'postcode',
+          'value': '4014'
+        },
+        {
+          'label': 'state',
+          'value': 'qld'
+        }
+      ];
+
+      callback(null, response);
+    };
+
+    const controller = libpostal(service, () => true);
+
+    const req = {
+      clean: {
+        text: 'original query'
+      },
+      errors: []
+    };
+
+    controller(req, undefined, () => {
+      t.deepEquals(req, {
+        clean: {
+          text: 'original query',
+          parser: 'libpostal',
+          parsed_text: {
+            // unit: '999',
+            number: '11/1015',
+            street: 'nudgee road',
+            neighbourhood: 'banyo',
+            postalcode: '4014',
+            state: 'qld'
+          }
+        },
+        errors: []
+      }, 'req should not have been modified');
+
+      t.end();
+
+    });
+
+  });
+
 };
 
 module.exports.all = (tape, common) => {