@routing  @guidance @collapsing
Feature: Collapse

    Background:
        Given the profile "car"
        Given a grid size of 5 meters

    @reverse
    Scenario: Collapse U-Turn Triangle Intersection
        Given the node map
            """
            g   f   e   d


            a     b     c
            """

        And the ways
            | nodes | highway      | name | oneway |
            | abc   | primary      | road | yes    |
            | defg  | primary      | road | yes    |
            | fb    | primary_link |      | yes    |
            | be    | primary_link |      | yes    |

       When I route I should get
            | waypoints | route          | turns                        |
            | a,g       | road,road,road | depart,continue uturn,arrive |
            | d,c       | road,road,road | depart,continue uturn,arrive |

    @reverse @traffic-signals
    Scenario: Collapse U-Turn Triangle Intersection
        Given the node map
            """
            g   f   j   e   d

                  h   i

            a       b       c
            """

        And the ways
            | nodes | highway      | name | oneway |
            | abc   | primary      | road | yes    |
            | dejfg | primary      | road | yes    |
            | fhb   | primary_link |      |        |
            | bie   | primary_link |      |        |

       And the nodes
            | node | highway         |
            | j    | traffic_signals |
            | h    | traffic_signals |
            | i    | traffic_signals |

       When I route I should get
            | waypoints | route          | turns                        |
            | a,g       | road,road,road | depart,continue uturn,arrive |
            | d,c       | road,road,road | depart,continue uturn,arrive |

    Scenario: Forking before a turn (forky)
        Given the node map
            """
                      g
                      .
                      c
            a . . b .'
                    `d.
                     f e
            """
            # note: check clooapse.feature for a similar test case where we do not
            # classify the situation as Sliproad and therefore keep the fork inst.

        And the ways
            | nodes | name  | oneway | highway   |
            | ab    | road  | yes    | primary   |
            | bd    | road  | yes    | primary   |
            | bc    | road  | yes    | primary   |
            | de    | road  | yes    | primary   |
            | fd    | cross | no     | secondary |
            | dc    | cross | no     | secondary |
            | cg    | cross | no     | secondary |

        And the relations
            | type        | way:from | way:to | node:via | restriction   |
            | restriction | bd       | dc     | d        | no_left_turn  |
            | restriction | bc       | dc     | c        | no_right_turn |

        When I route I should get
            | waypoints | route                 | turns                                          |
            | a,g       | road,cross,cross      | depart,turn left,arrive                        |
            | a,e       | road,road,road        | depart,continue right,arrive                   |
            # We should discuss whether the next item should be collapsed to depart,turn right,arrive.
            | a,f       | road,road,cross,cross | depart,continue slight right,turn right,arrive |