+ ##
+ # test that uploading a way referencing invalid placeholders gives a
+ # proper error, not a 500.
+ def test_upload_placeholder_invalid_way
+ basic_authorization "test@example.com", "test"
+
+ diff = <<EOF
+<osmChange>
+ <create>
+ <node id="-1" lon="0" lat="0" changeset="2" version="1"/>
+ <node id="-2" lon="1" lat="1" changeset="2" version="1"/>
+ <node id="-3" lon="2" lat="2" changeset="2" version="1"/>
+ <way id="-1" changeset="2" version="1">
+ <nd ref="-1"/>
+ <nd ref="-2"/>
+ <nd ref="-3"/>
+ <nd ref="-4"/>
+ </way>
+ </create>
+</osmChange>
+EOF
+
+ # upload it
+ content diff
+ post :upload, :id => 2
+ assert_response :bad_request,
+ "shouldn't be able to use invalid placeholder IDs"
+ assert_equal "Placeholder node not found for reference -4 in way -1", @response.body
+
+ # the same again, but this time use an existing way
+ diff = <<EOF
+<osmChange>
+ <create>
+ <node id="-1" lon="0" lat="0" changeset="2" version="1"/>
+ <node id="-2" lon="1" lat="1" changeset="2" version="1"/>
+ <node id="-3" lon="2" lat="2" changeset="2" version="1"/>
+ <way id="1" changeset="2" version="1">
+ <nd ref="-1"/>
+ <nd ref="-2"/>
+ <nd ref="-3"/>
+ <nd ref="-4"/>
+ </way>
+ </create>
+</osmChange>
+EOF
+
+ # upload it
+ content diff
+ post :upload, :id => 2
+ assert_response :bad_request,
+ "shouldn't be able to use invalid placeholder IDs"
+ assert_equal "Placeholder node not found for reference -4 in way 1", @response.body
+ end
+
+ ##
+ # test that uploading a relation referencing invalid placeholders gives a
+ # proper error, not a 500.
+ def test_upload_placeholder_invalid_relation
+ basic_authorization "test@example.com", "test"
+
+ diff = <<EOF
+<osmChange>
+ <create>
+ <node id="-1" lon="0" lat="0" changeset="2" version="1"/>
+ <node id="-2" lon="1" lat="1" changeset="2" version="1"/>
+ <node id="-3" lon="2" lat="2" changeset="2" version="1"/>
+ <relation id="-1" changeset="2" version="1">
+ <member type="node" role="foo" ref="-1"/>
+ <member type="node" role="foo" ref="-2"/>
+ <member type="node" role="foo" ref="-3"/>
+ <member type="node" role="foo" ref="-4"/>
+ </relation>
+ </create>
+</osmChange>
+EOF
+
+ # upload it
+ content diff
+ post :upload, :id => 2
+ assert_response :bad_request,
+ "shouldn't be able to use invalid placeholder IDs"
+ assert_equal "Placeholder Node not found for reference -4 in relation -1.", @response.body
+
+ # the same again, but this time use an existing way
+ diff = <<EOF
+<osmChange>
+ <create>
+ <node id="-1" lon="0" lat="0" changeset="2" version="1"/>
+ <node id="-2" lon="1" lat="1" changeset="2" version="1"/>
+ <node id="-3" lon="2" lat="2" changeset="2" version="1"/>
+ <relation id="1" changeset="2" version="1">
+ <member type="node" role="foo" ref="-1"/>
+ <member type="node" role="foo" ref="-2"/>
+ <member type="node" role="foo" ref="-3"/>
+ <member type="way" role="bar" ref="-1"/>
+ </relation>
+ </create>
+</osmChange>
+EOF
+
+ # upload it
+ content diff
+ post :upload, :id => 2
+ assert_response :bad_request,
+ "shouldn't be able to use invalid placeholder IDs"
+ assert_equal "Placeholder Way not found for reference -1 in relation 1.", @response.body
+ end
+