implement flag edge-weight-updates-over-factor, to log edge weight

updates over provided x factor

features/options/contract/edge-weight-updates-over-factor.feature

@@ -0,0 +1,30 @@
+@contract @options @edge-weight-updates-over-factor
+Feature: osrm-contract command line option: edge-weight-updates-over-factor
+
+    Background: Log edge weight updates over given factor
+
+    Scenario: Logging weight with updates over factor of 2, long segment
+        Given the node locations
+            | node | lat        | lon      |
+            | a    | 0.1        | 0.1      |
+            | b    | .05        | 0.1      |
+            | c    | 0.3        | 0.1      |
+        And the ways
+            | nodes | highway     |
+            | ab    | residential |
+            | ac    | primary     |
+        Given the profile "testbot"
+        Given the extract extra arguments "--generate-edge-lookup"
+        Given the speed file
+        """
+        1,2,100
+        1,3,100
+        """
+        And the data has been extracted
+        When I run "osrm-contract --edge-weight-updates-over-factor 2 --segment-speed-file {speeds_file} {processed_file}"
+        And stderr should contain "weight updates"
+        And stderr should contain "New speed: 100 kph"
+        And I route I should get
+            | from | to | route    | speed     |
+            | a    | b  | ab,ab    | 100 km/h  |
+            | a    | c  | ac,ac    | 100 km/h  |

features/options/contract/version.feature

@@ -6,7 +6,7 @@ Feature: osrm-contract command line options: version
 
     Background:
         Given the profile "testbot"
-    
+
     Scenario: osrm-contract - Version, short
         When I run "osrm-contract --v"
         Then stderr should be empty

features/step_definitions/options.js

@@ -86,6 +86,10 @@ module.exports = function () {
         assert.equal(this.stdout.split('\n').length - 1, parseInt(lines));
     });
 
+    this.Then(/^stderr should contain (\d+) lines?$/, (lines) => {
+        assert.equal(this.stderr.split('\n').length - 1, parseInt(lines));
+    });
+
     this.Then(/^datasource names should contain "(.+)"$/, (expectedData) => {
         var actualData = fs.readFileSync(this.processedCacheFile + '.datasource_names', {encoding:'UTF-8'}).trim().split('\n').join(',');
         assert.equal(actualData, expectedData);