Test that alternative route exists

Complement to a6b44a1470

features/step_definitions/routing.rb

@@ -82,6 +82,10 @@ When /^I route I should get$/ do |table|
         end
         if table.headers.include? 'route'
           got['route'] = (instructions || '').strip
+          if table.headers.include?('alternative')
+            raise "*** No alternative found ***" unless json['found_alternative']
+            got['alternative'] = way_list json['alternative_instructions'].first
+          end
           if table.headers.include?('distance')
             if row['distance']!=''
               raise "*** Distance must be specied in meters. (ex: 250m)" unless row['distance'] =~ /\d+m/

features/testbot/via.feature

@@ -52,6 +52,31 @@ Feature: Via points
             | a,c,f     | ab,bcd,bcd,de,efg        |
             | a,c,f,h   | ab,bcd,bcd,de,efg,efg,gh |
 
+    Scenario: Alternative via points
+        Given the node map
+            |   | b | c | d |   |   |
+            | a |   |   |   |   | z |
+            |   | g | h | i | j |   |
+
+        And the ways
+            | nodes |
+            | ab    |
+            | bc    |
+            | cd    |
+            | dz    |
+            | ag    |
+            | gh    |
+            | hi    |
+            | ij    |
+            | jz    |
+
+        And the query options
+            | alt | true |
+
+        When I route I should get
+            | waypoints | route       | alternative    |
+            | a,z       | ab,bc,cd,dz | ag,gh,hi,ij,jz |
+
     Scenario: Duplicate via point
         Given the node map
             | x |   |   |   |   |   |