Expose component size variable as command-line option (this allows testing of big/small components in cucumber tests).

Add ability to pass extra parameters to  during tests.
Limit distance table search so that it doesn't return any big components if they're beyond max_distance.

features/step_definitions/data.rb

@@ -6,6 +6,10 @@ Given(/^the import format "(.*?)"$/) do |format|
   set_input_format format
 end
 
+Given /^the extract extra arguments "(.*?)"$/ do |args|
+    set_extract_args args
+end
+
 Given /^a grid size of (\d+) meters$/ do |meters|
   set_grid_size meters
 end

features/support/config.rb

@@ -10,3 +10,7 @@ end
 def set_profile profile
   @profile = profile
 end
+
+def set_extract_args args
+    @extract_args = args
+end

features/support/data.rb

@@ -274,7 +274,7 @@ def extract_data
   Dir.chdir TEST_FOLDER do
     log_preprocess_info
     log "== Extracting #{osm_file}.osm...", :preprocess
-    unless system "#{BIN_PATH}/osrm-extract #{osm_file}.osm#{'.pbf' if pbf?} --profile #{PROFILES_PATH}/#{@profile}.lua >>#{PREPROCESS_LOG_FILE} 2>&1"
+    unless system "#{BIN_PATH}/osrm-extract #{osm_file}.osm#{'.pbf' if pbf?} #{@extract_args} --profile #{PROFILES_PATH}/#{@profile}.lua >>#{PREPROCESS_LOG_FILE} 2>&1"
       log "*** Exited with code #{$?.exitstatus}.", :preprocess
       raise ExtractError.new $?.exitstatus, "osrm-extract exited with code #{$?.exitstatus}."
     end

features/testbot/distance_matrix.feature

@@ -135,3 +135,30 @@ Feature: Basic Distance Matrix
             |   | b   | e   | f   |
             | a | 100 | 200 | 300 |
             | b | 0   | 100 | 200 |
+
+    # There is a 1100m limit when searching for nearest neighbours
+    # so we set the grid size to something that makes it easy to
+    # put nodes inside/outside that limit
+    Scenario: Testbog - Check snapping on on small components
+        Given a grid size of 300 meters
+        Given the extract extra arguments "--small-component-size 4"
+        Given the node map
+            | a | b |  |   | m |  | x |
+            | d | e |  |   | n |  | y |
+
+        And the ways
+            | nodes |
+            | ab    |
+            | be    |
+            | ed    |
+            | da    |
+            | xy    |
+
+        When I request a travel time matrix I should get
+            |   | a   | b   | x   | y   | m   | n   |
+            | a | 0   | 300 |     |     | 300 | 600 |
+            | b | 300 |  0  |     |     | 0   | 300 |
+            | x |     |     | 0   | 300 |     |     |
+            | y |     |     | 300 | 0   |     |     |
+            | m | 300 | 0   |     |     | 0   | 300 |
+            | n | 600 | 300 |     |     | 300 | 0   |