X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/c3e2e6462f293596aef5d5de18b0a173edc046c7..c2e12ed77d8223737fe8f8e2e2b21a0822153fa1:/test/controllers/way_controller_test.rb

diff --git a/test/controllers/way_controller_test.rb b/test/controllers/way_controller_test.rb
index ca87e6543..ccf299455 100644
--- a/test/controllers/way_controller_test.rb
+++ b/test/controllers/way_controller_test.rb
@@ -1,5 +1,5 @@
-require 'test_helper'
-require 'way_controller'
+require "test_helper"
+require "way_controller"
 
 class WayControllerTest < ActionController::TestCase
   api_fixtures
@@ -65,11 +65,11 @@ class WayControllerTest < ActionController::TestCase
 
       # otherwise it should say success
       assert_response :success
-      
+
       # Check the way is correctly returned
       assert_select "osm way[id='#{way.id}'][version='#{way.version}'][visible='#{way.visible}']", 1
-      
-      # check that each node in the way appears once in the output as a 
+
+      # check that each node in the way appears once in the output as a
       # reference and as the node element.
       way.nodes.each do |n|
         count = (way.nodes - (way.nodes - [n])).length
@@ -118,17 +118,15 @@ class WayControllerTest < ActionController::TestCase
 
     # use the first user's open changeset
     changeset_id = changesets(:normal_user_first_change).id
-    
+
     # create a way with pre-existing nodes
     content "<osm><way changeset='#{changeset_id}'>" +
-      "<nd ref='#{nid1}'/><nd ref='#{nid2}'/>" + 
-      "<tag k='test' v='yes' /></way></osm>"
+            "<nd ref='#{nid1}'/><nd ref='#{nid2}'/>" +
+            "<tag k='test' v='yes' /></way></osm>"
     put :create
-    # hope for success
-    assert_response :forbidden, 
-        "way upload did not return success status"
-    # read id of created way and search for it
-    wayid = @response.body
+    # hope for failure
+    assert_response :forbidden,
+                    "way upload did not return forbidden status"
 
     ## Now use a public user
     nid1 = current_nodes(:used_node_1).id
@@ -137,33 +135,33 @@ class WayControllerTest < ActionController::TestCase
 
     # use the first user's open changeset
     changeset_id = changesets(:public_user_first_change).id
-    
+
     # create a way with pre-existing nodes
     content "<osm><way changeset='#{changeset_id}'>" +
-      "<nd ref='#{nid1}'/><nd ref='#{nid2}'/>" + 
-      "<tag k='test' v='yes' /></way></osm>"
+            "<nd ref='#{nid1}'/><nd ref='#{nid2}'/>" +
+            "<tag k='test' v='yes' /></way></osm>"
     put :create
     # hope for success
-    assert_response :success, 
-        "way upload did not return success status"
+    assert_response :success,
+                    "way upload did not return success status"
     # read id of created way and search for it
     wayid = @response.body
     checkway = Way.find(wayid)
-    assert_not_nil checkway, 
-        "uploaded way not found in data base after upload"
+    assert_not_nil checkway,
+                   "uploaded way not found in data base after upload"
     # compare values
-    assert_equal checkway.nds.length, 2, 
-        "saved way does not contain exactly one node"
-    assert_equal checkway.nds[0], nid1, 
-        "saved way does not contain the right node on pos 0"
-    assert_equal checkway.nds[1], nid2, 
-        "saved way does not contain the right node on pos 1"
+    assert_equal checkway.nds.length, 2,
+                 "saved way does not contain exactly one node"
+    assert_equal checkway.nds[0], nid1,
+                 "saved way does not contain the right node on pos 0"
+    assert_equal checkway.nds[1], nid2,
+                 "saved way does not contain the right node on pos 1"
     assert_equal checkway.changeset_id, changeset_id,
-        "saved way does not belong to the correct changeset"
-    assert_equal users(:public_user).id, checkway.changeset.user_id, 
-        "saved way does not belong to user that created it"
-    assert_equal true, checkway.visible, 
-        "saved way is not visible"
+                 "saved way does not belong to the correct changeset"
+    assert_equal users(:public_user).id, checkway.changeset.user_id,
+                 "saved way does not belong to user that created it"
+    assert_equal true, checkway.visible,
+                 "saved way is not visible"
   end
 
   # -------------------------------------
@@ -180,30 +178,29 @@ class WayControllerTest < ActionController::TestCase
     nid1 = current_nodes(:used_node_1).id
 
     # create a way with non-existing node
-    content "<osm><way changeset='#{open_changeset_id}'>" + 
-      "<nd ref='0'/><tag k='test' v='yes' /></way></osm>"
+    content "<osm><way changeset='#{open_changeset_id}'>" +
+            "<nd ref='0'/><tag k='test' v='yes' /></way></osm>"
     put :create
     # expect failure
-    assert_response :forbidden, 
-    "way upload with invalid node using a private user did not return 'forbidden'"
+    assert_response :forbidden,
+                    "way upload with invalid node using a private user did not return 'forbidden'"
 
     # create a way with no nodes
     content "<osm><way changeset='#{open_changeset_id}'>" +
-      "<tag k='test' v='yes' /></way></osm>"
+            "<tag k='test' v='yes' /></way></osm>"
     put :create
     # expect failure
-    assert_response :forbidden, 
-    "way upload with no node using a private userdid not return 'forbidden'"
+    assert_response :forbidden,
+                    "way upload with no node using a private userdid not return 'forbidden'"
 
     # create a way inside a closed changeset
     content "<osm><way changeset='#{closed_changeset_id}'>" +
-      "<nd ref='#{nid1}'/></way></osm>"
+            "<nd ref='#{nid1}'/></way></osm>"
     put :create
     # expect failure
-    assert_response :forbidden, 
-    "way upload to closed changeset with a private user did not return 'forbidden'"    
+    assert_response :forbidden,
+                    "way upload to closed changeset with a private user did not return 'forbidden'"
 
-    
     ## Now test with a public user
     basic_authorization users(:public_user).email, "test"
 
@@ -213,63 +210,63 @@ class WayControllerTest < ActionController::TestCase
     nid1 = current_nodes(:used_node_1).id
 
     # create a way with non-existing node
-    content "<osm><way changeset='#{open_changeset_id}'>" + 
-      "<nd ref='0'/><tag k='test' v='yes' /></way></osm>"
+    content "<osm><way changeset='#{open_changeset_id}'>" +
+            "<nd ref='0'/><tag k='test' v='yes' /></way></osm>"
     put :create
     # expect failure
-    assert_response :precondition_failed, 
-        "way upload with invalid node did not return 'precondition failed'"
+    assert_response :precondition_failed,
+                    "way upload with invalid node did not return 'precondition failed'"
     assert_equal "Precondition failed: Way  requires the nodes with id in (0), which either do not exist, or are not visible.", @response.body
 
     # create a way with no nodes
     content "<osm><way changeset='#{open_changeset_id}'>" +
-      "<tag k='test' v='yes' /></way></osm>"
+            "<tag k='test' v='yes' /></way></osm>"
     put :create
     # expect failure
-    assert_response :precondition_failed, 
-        "way upload with no node did not return 'precondition failed'"
+    assert_response :precondition_failed,
+                    "way upload with no node did not return 'precondition failed'"
     assert_equal "Precondition failed: Cannot create way: data is invalid.", @response.body
 
     # create a way inside a closed changeset
     content "<osm><way changeset='#{closed_changeset_id}'>" +
-      "<nd ref='#{nid1}'/></way></osm>"
+            "<nd ref='#{nid1}'/></way></osm>"
     put :create
     # expect failure
-    assert_response :conflict, 
-        "way upload to closed changeset did not return 'conflict'"    
+    assert_response :conflict,
+                    "way upload to closed changeset did not return 'conflict'"
 
     # create a way with a tag which is too long
     content "<osm><way changeset='#{open_changeset_id}'>" +
-      "<nd ref='#{nid1}'/>" +
-      "<tag k='foo' v='#{'x'*256}'/>" +
-      "</way></osm>"
+            "<nd ref='#{nid1}'/>" +
+            "<tag k='foo' v='#{'x' * 256}'/>" +
+            "</way></osm>"
     put :create
     # expect failure
-    assert_response :bad_request, 
-        "way upload to with too long tag did not return 'bad_request'"
+    assert_response :bad_request,
+                    "way upload to with too long tag did not return 'bad_request'"
   end
 
   # -------------------------------------
   # Test deleting ways.
   # -------------------------------------
-  
+
   def test_delete
     # first try to delete way without auth
     delete :delete, :id => current_ways(:visible_way).id
     assert_response :unauthorized
 
     # now set auth using the private user
-    basic_authorization(users(:normal_user).email, "test");  
+    basic_authorization(users(:normal_user).email, "test")
 
     # this shouldn't work as with the 0.6 api we need pay load to delete
     delete :delete, :id => current_ways(:visible_way).id
     assert_response :forbidden
-    
+
     # Now try without having a changeset
     content "<osm><way id='#{current_ways(:visible_way).id}'/></osm>"
     delete :delete, :id => current_ways(:visible_way).id
     assert_response :forbidden
-    
+
     # try to delete with an invalid (closed) changeset
     content update_changeset(current_ways(:visible_way).to_xml,
                              changesets(:normal_user_closed_change).id)
@@ -277,7 +274,7 @@ class WayControllerTest < ActionController::TestCase
     assert_response :forbidden
 
     # try to delete with an invalid (non-existent) changeset
-    content update_changeset(current_ways(:visible_way).to_xml,0)
+    content update_changeset(current_ways(:visible_way).to_xml, 0)
     delete :delete, :id => current_ways(:visible_way).id
     assert_response :forbidden
 
@@ -289,7 +286,7 @@ class WayControllerTest < ActionController::TestCase
     # check the returned value - should be the new version number
     # valid delete should return the new version number, which should
     # be greater than the old version number
-    #assert @response.body.to_i > current_ways(:visible_way).version,
+    # assert @response.body.to_i > current_ways(:visible_way).version,
     #   "delete request should return a new version number for way"
 
     # this won't work since the way is already deleted
@@ -300,27 +297,26 @@ class WayControllerTest < ActionController::TestCase
     # this shouldn't work as the way is used in a relation
     content current_ways(:used_way).to_xml
     delete :delete, :id => current_ways(:used_way).id
-    assert_response :forbidden, 
-    "shouldn't be able to delete a way used in a relation (#{@response.body}), when done by a private user"
+    assert_response :forbidden,
+                    "shouldn't be able to delete a way used in a relation (#{@response.body}), when done by a private user"
 
     # this won't work since the way never existed
     delete :delete, :id => 0
     assert_response :forbidden
 
-    
     ### Now check with a public user
     # now set auth
-    basic_authorization(users(:public_user).email, "test");  
+    basic_authorization(users(:public_user).email, "test")
 
     # this shouldn't work as with the 0.6 api we need pay load to delete
     delete :delete, :id => current_ways(:visible_way).id
     assert_response :bad_request
-    
+
     # Now try without having a changeset
     content "<osm><way id='#{current_ways(:visible_way).id}'/></osm>"
     delete :delete, :id => current_ways(:visible_way).id
     assert_response :bad_request
-    
+
     # try to delete with an invalid (closed) changeset
     content update_changeset(current_ways(:visible_way).to_xml,
                              changesets(:public_user_closed_change).id)
@@ -328,7 +324,7 @@ class WayControllerTest < ActionController::TestCase
     assert_response :conflict
 
     # try to delete with an invalid (non-existent) changeset
-    content update_changeset(current_ways(:visible_way).to_xml,0)
+    content update_changeset(current_ways(:visible_way).to_xml, 0)
     delete :delete, :id => current_ways(:visible_way).id
     assert_response :conflict
 
@@ -341,7 +337,7 @@ class WayControllerTest < ActionController::TestCase
     # valid delete should return the new version number, which should
     # be greater than the old version number
     assert @response.body.to_i > current_ways(:visible_way).version,
-       "delete request should return a new version number for way"
+           "delete request should return a new version number for way"
 
     # this won't work since the way is already deleted
     content current_ways(:invisible_way).to_xml
@@ -351,8 +347,8 @@ class WayControllerTest < ActionController::TestCase
     # this shouldn't work as the way is used in a relation
     content current_ways(:used_way).to_xml
     delete :delete, :id => current_ways(:used_way).id
-    assert_response :precondition_failed, 
-       "shouldn't be able to delete a way used in a relation (#{@response.body})"
+    assert_response :precondition_failed,
+                    "shouldn't be able to delete a way used in a relation (#{@response.body})"
     assert_equal "Precondition failed: Way 3 is still used by relations 1.", @response.body
 
     # this won't work since the way never existed
@@ -360,10 +356,181 @@ class WayControllerTest < ActionController::TestCase
     assert_response :not_found
   end
 
+  ##
+  # tests whether the API works and prevents incorrect use while trying
+  # to update ways.
+  def test_update
+    ## First test with no user credentials
+    # try and update a way without authorisation
+    # first try to delete way without auth
+    content current_ways(:visible_way).to_xml
+    put :update, :id => current_ways(:visible_way).id
+    assert_response :unauthorized
+
+    ## Second test with the private user
+
+    # setup auth
+    basic_authorization(users(:normal_user).email, "test")
+
+    ## trying to break changesets
+
+    # try and update in someone else's changeset
+    content update_changeset(current_ways(:visible_way).to_xml,
+                             changesets(:public_user_first_change).id)
+    put :update, :id => current_ways(:visible_way).id
+    assert_require_public_data "update with other user's changeset should be forbidden when date isn't public"
+
+    # try and update in a closed changeset
+    content update_changeset(current_ways(:visible_way).to_xml,
+                             changesets(:normal_user_closed_change).id)
+    put :update, :id => current_ways(:visible_way).id
+    assert_require_public_data "update with closed changeset should be forbidden, when data isn't public"
+
+    # try and update in a non-existant changeset
+    content update_changeset(current_ways(:visible_way).to_xml, 0)
+    put :update, :id => current_ways(:visible_way).id
+    assert_require_public_data("update with changeset=0 should be forbidden, when data isn't public")
+
+    ## try and submit invalid updates
+    content xml_replace_node(current_ways(:visible_way).to_xml, 3, 9999)
+    put :update, :id => current_ways(:visible_way).id
+    assert_require_public_data "way with non-existent node should be forbidden, when data isn't public"
+
+    content xml_replace_node(current_ways(:visible_way).to_xml, 3, current_nodes(:invisible_node).id)
+    put :update, :id => current_ways(:visible_way).id
+    assert_require_public_data "way with deleted node should be forbidden, when data isn't public"
+
+    ## finally, produce a good request which should work
+    content current_ways(:visible_way).to_xml
+    put :update, :id => current_ways(:visible_way).id
+    assert_require_public_data "should have failed with a forbidden when data isn't public"
+
+    ## Finally test with the public user
+
+    # try and update a way without authorisation
+    # first try to delete way without auth
+    content current_ways(:visible_way).to_xml
+    put :update, :id => current_ways(:visible_way).id
+    assert_response :forbidden
+
+    # setup auth
+    basic_authorization(users(:public_user).email, "test")
+
+    ## trying to break changesets
+
+    # try and update in someone else's changeset
+    content update_changeset(current_ways(:visible_way).to_xml,
+                             changesets(:normal_user_first_change).id)
+    put :update, :id => current_ways(:visible_way).id
+    assert_response :conflict, "update with other user's changeset should be rejected"
+
+    # try and update in a closed changeset
+    content update_changeset(current_ways(:visible_way).to_xml,
+                             changesets(:normal_user_closed_change).id)
+    put :update, :id => current_ways(:visible_way).id
+    assert_response :conflict, "update with closed changeset should be rejected"
+
+    # try and update in a non-existant changeset
+    content update_changeset(current_ways(:visible_way).to_xml, 0)
+    put :update, :id => current_ways(:visible_way).id
+    assert_response :conflict, "update with changeset=0 should be rejected"
+
+    ## try and submit invalid updates
+    content xml_replace_node(current_ways(:visible_way).to_xml, 3, 9999)
+    put :update, :id => current_ways(:visible_way).id
+    assert_response :precondition_failed, "way with non-existent node should be rejected"
+
+    content xml_replace_node(current_ways(:visible_way).to_xml, 3, current_nodes(:invisible_node).id)
+    put :update, :id => current_ways(:visible_way).id
+    assert_response :precondition_failed, "way with deleted node should be rejected"
+
+    ## next, attack the versioning
+    current_way_version = current_ways(:visible_way).version
+
+    # try and submit a version behind
+    content xml_attr_rewrite(current_ways(:visible_way).to_xml,
+                             "version", current_way_version - 1)
+    put :update, :id => current_ways(:visible_way).id
+    assert_response :conflict, "should have failed on old version number"
+
+    # try and submit a version ahead
+    content xml_attr_rewrite(current_ways(:visible_way).to_xml,
+                             "version", current_way_version + 1)
+    put :update, :id => current_ways(:visible_way).id
+    assert_response :conflict, "should have failed on skipped version number"
+
+    # try and submit total crap in the version field
+    content xml_attr_rewrite(current_ways(:visible_way).to_xml,
+                             "version", "p1r4t3s!")
+    put :update, :id => current_ways(:visible_way).id
+    assert_response :conflict,
+                    "should not be able to put 'p1r4at3s!' in the version field"
+
+    ## try an update with the wrong ID
+    content current_ways(:used_way).to_xml
+    put :update, :id => current_ways(:visible_way).id
+    assert_response :bad_request,
+                    "should not be able to update a way with a different ID from the XML"
+
+    ## try an update with a minimal valid XML doc which isn't a well-formed OSM doc.
+    content "<update/>"
+    put :update, :id => current_ways(:visible_way).id
+    assert_response :bad_request,
+                    "should not be able to update a way with non-OSM XML doc."
+
+    ## finally, produce a good request which should work
+    content current_ways(:visible_way).to_xml
+    put :update, :id => current_ways(:visible_way).id
+    assert_response :success, "a valid update request failed"
+  end
+
   # ------------------------------------------------------------
   # test tags handling
   # ------------------------------------------------------------
 
+  ##
+  # Try adding a new tag to a way
+  def test_add_tags
+    ## Try with the non-public user
+    # setup auth
+    basic_authorization(users(:normal_user).email, "test")
+
+    # add an identical tag to the way
+    tag_xml = XML::Node.new("tag")
+    tag_xml["k"] = "new"
+    tag_xml["v"] = "yes"
+
+    # add the tag into the existing xml
+    way_xml = current_ways(:visible_way).to_xml
+    way_xml.find("//osm/way").first << tag_xml
+
+    # try and upload it
+    content way_xml
+    put :update, :id => current_ways(:visible_way).id
+    assert_response :forbidden,
+                    "adding a duplicate tag to a way for a non-public should fail with 'forbidden'"
+
+    ## Now try with the public user
+    # setup auth
+    basic_authorization(users(:public_user).email, "test")
+
+    # add an identical tag to the way
+    tag_xml = XML::Node.new("tag")
+    tag_xml["k"] = "new"
+    tag_xml["v"] = "yes"
+
+    # add the tag into the existing xml
+    way_xml = current_ways(:visible_way).to_xml
+    way_xml.find("//osm/way").first << tag_xml
+
+    # try and upload it
+    content way_xml
+    put :update, :id => current_ways(:visible_way).id
+    assert_response :success,
+                    "adding a new tag to a way should succeed"
+    assert_equal current_ways(:visible_way).version + 1, @response.body.to_i
+  end
+
   ##
   # Try adding a duplicate of an existing tag to a way
   def test_add_duplicate_tags
@@ -373,8 +540,8 @@ class WayControllerTest < ActionController::TestCase
 
     # add an identical tag to the way
     tag_xml = XML::Node.new("tag")
-    tag_xml['k'] = current_way_tags(:t1).k
-    tag_xml['v'] = current_way_tags(:t1).v
+    tag_xml["k"] = current_way_tags(:t1).k
+    tag_xml["v"] = current_way_tags(:t1).v
 
     # add the tag into the existing xml
     way_xml = current_ways(:visible_way).to_xml
@@ -383,8 +550,8 @@ class WayControllerTest < ActionController::TestCase
     # try and upload it
     content way_xml
     put :update, :id => current_ways(:visible_way).id
-    assert_response :forbidden, 
-    "adding a duplicate tag to a way for a non-public should fail with 'forbidden'"
+    assert_response :forbidden,
+                    "adding a duplicate tag to a way for a non-public should fail with 'forbidden'"
 
     ## Now try with the public user
     # setup auth
@@ -392,8 +559,8 @@ class WayControllerTest < ActionController::TestCase
 
     # add an identical tag to the way
     tag_xml = XML::Node.new("tag")
-    tag_xml['k'] = current_way_tags(:t1).k
-    tag_xml['v'] = current_way_tags(:t1).v
+    tag_xml["k"] = current_way_tags(:t1).k
+    tag_xml["v"] = current_way_tags(:t1).v
 
     # add the tag into the existing xml
     way_xml = current_ways(:visible_way).to_xml
@@ -402,8 +569,8 @@ class WayControllerTest < ActionController::TestCase
     # try and upload it
     content way_xml
     put :update, :id => current_ways(:visible_way).id
-    assert_response :bad_request, 
-       "adding a duplicate tag to a way should fail with 'bad request'"
+    assert_response :bad_request,
+                    "adding a duplicate tag to a way should fail with 'bad request'"
     assert_equal "Element way/#{current_ways(:visible_way).id} has duplicate tags with key #{current_way_tags(:t1).k}", @response.body
   end
 
@@ -416,8 +583,8 @@ class WayControllerTest < ActionController::TestCase
 
     # create duplicate tag
     tag_xml = XML::Node.new("tag")
-    tag_xml['k'] = "i_am_a_duplicate"
-    tag_xml['v'] = "foobar"
+    tag_xml["k"] = "i_am_a_duplicate"
+    tag_xml["v"] = "foobar"
 
     # add the tag into the existing xml
     way_xml = current_ways(:visible_way).to_xml
@@ -428,17 +595,17 @@ class WayControllerTest < ActionController::TestCase
     # try and upload it
     content way_xml
     put :update, :id => current_ways(:visible_way).id
-    assert_response :forbidden, 
-    "adding new duplicate tags to a way using a non-public user should fail with 'forbidden'"
-    
+    assert_response :forbidden,
+                    "adding new duplicate tags to a way using a non-public user should fail with 'forbidden'"
+
     ## Now test with the public user
     # setup auth
     basic_authorization(users(:public_user).email, "test")
 
     # create duplicate tag
     tag_xml = XML::Node.new("tag")
-    tag_xml['k'] = "i_am_a_duplicate"
-    tag_xml['v'] = "foobar"
+    tag_xml["k"] = "i_am_a_duplicate"
+    tag_xml["v"] = "foobar"
 
     # add the tag into the existing xml
     way_xml = current_ways(:visible_way).to_xml
@@ -449,10 +616,9 @@ class WayControllerTest < ActionController::TestCase
     # try and upload it
     content way_xml
     put :update, :id => current_ways(:visible_way).id
-    assert_response :bad_request, 
-       "adding new duplicate tags to a way should fail with 'bad request'"
+    assert_response :bad_request,
+                    "adding new duplicate tags to a way should fail with 'bad request'"
     assert_equal "Element way/#{current_ways(:visible_way).id} has duplicate tags with key i_am_a_duplicate", @response.body
-    
   end
 
   ##
@@ -468,14 +634,14 @@ class WayControllerTest < ActionController::TestCase
     way_str = "<osm><way changeset='1'>"
     way_str << "<tag k='addr:housenumber' v='1'/>"
     way_str << "<tag k='addr:housenumber' v='2'/>"
-    way_str << "</way></osm>";
+    way_str << "</way></osm>"
 
     # try and upload it
     content way_str
     put :create
-    assert_response :forbidden, 
-    "adding new duplicate tags to a way with a non-public user should fail with 'forbidden'"
-    
+    assert_response :forbidden,
+                    "adding new duplicate tags to a way with a non-public user should fail with 'forbidden'"
+
     ## Now do it with a public user
     # setup auth
     basic_authorization(users(:public_user).email, "test")
@@ -484,13 +650,13 @@ class WayControllerTest < ActionController::TestCase
     way_str = "<osm><way changeset='1'>"
     way_str << "<tag k='addr:housenumber' v='1'/>"
     way_str << "<tag k='addr:housenumber' v='2'/>"
-    way_str << "</way></osm>";
+    way_str << "</way></osm>"
 
     # try and upload it
     content way_str
     put :create
-    assert_response :bad_request, 
-    "adding new duplicate tags to a way should fail with 'bad request'"
+    assert_response :bad_request,
+                    "adding new duplicate tags to a way should fail with 'bad request'"
     assert_equal "Element way/ has duplicate tags with key addr:housenumber", @response.body
   end
 
@@ -498,7 +664,7 @@ class WayControllerTest < ActionController::TestCase
   # test that a call to ways_for_node returns all ways that contain the node
   # and none that don't.
   def test_ways_for_node
-    # in current fixtures ways 1 and 3 all use node 3. ways 2 and 4 
+    # in current fixtures ways 1 and 3 all use node 3. ways 2 and 4
     # *used* to use it but doesn't.
     get :ways_for_node, :id => current_nodes(:used_node_1).id
     assert_response :success
@@ -506,13 +672,12 @@ class WayControllerTest < ActionController::TestCase
     assert_not_nil ways_xml, "failed to parse ways_for_node response"
 
     # check that the set of IDs match expectations
-    expected_way_ids = [ current_ways(:visible_way).id,
-                         current_ways(:used_way).id
-                       ]
+    expected_way_ids = [current_ways(:visible_way).id,
+                        current_ways(:used_way).id]
     found_way_ids = ways_xml.find("//osm/way").collect { |w| w["id"].to_i }
     assert_equal expected_way_ids.sort, found_way_ids.sort,
-      "expected ways for node #{current_nodes(:used_node_1).id} did not match found"
-    
+                 "expected ways for node #{current_nodes(:used_node_1).id} did not match found"
+
     # check the full ways to ensure we're not missing anything
     expected_way_ids.each do |id|
       way_xml = ways_xml.find("//osm/way[@id='#{id}']").first
@@ -522,15 +687,22 @@ class WayControllerTest < ActionController::TestCase
   end
 
   ##
-  # update the changeset_id of a node element
+  # update the changeset_id of a way element
   def update_changeset(xml, changeset_id)
-    xml_attr_rewrite(xml, 'changeset', changeset_id)
+    xml_attr_rewrite(xml, "changeset", changeset_id)
   end
 
   ##
-  # update an attribute in the node element
+  # update an attribute in the way element
   def xml_attr_rewrite(xml, name, value)
     xml.find("//osm/way").first[name] = value.to_s
-    return xml
+    xml
+  end
+
+  ##
+  # replace a node in a way element
+  def xml_replace_node(xml, old_node, new_node)
+    xml.find("//osm/way/nd[@ref='#{old_node}']").first["ref"] = new_node.to_s
+    xml
   end
 end