# Copyright 2017 "Neo Technology",
# Network Engine for Objects in Lund AB (http://neotechnology.com)
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
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#

Feature: Comparability

  Scenario: Comparing strings and integers using > in an AND'd predicate
    Given an empty graph
    And having executed:
      """
      CREATE (root:Root)-[:T]->(:Child {id: 0}),
             (root)-[:T]->(:Child {id: 'xx'}),
             (root)-[:T]->(:Child)
      """
    When executing query:
      """
      MATCH (:Root)-->(i:Child)
      WHERE exists(i.id) AND i.id > 'x'
      RETURN i.id
      """
    Then the result should be:
      | i.id |
      | 'xx' |
    And no side effects

  Scenario: Comparing strings and integers using > in a OR'd predicate
    Given an empty graph
    And having executed:
      """
      CREATE (root:Root)-[:T]->(:Child {id: 0}),
             (root)-[:T]->(:Child {id: 'xx'}),
             (root)-[:T]->(:Child)
      """
    When executing query:
      """
      MATCH (:Root)-->(i:Child)
      WHERE NOT exists(i.id) OR i.id > 'x'
      RETURN i.id
      """
    Then the result should be:
      | i.id |
      | 'xx' |
      | null |
    And no side effects

  Scenario Outline: Comparing across types yields null, except numbers
    Given an empty graph
    And having executed:
      """
      CREATE ()-[:T]->()
      """
    When executing query:
      """
      MATCH p = (n)-[r]->()
      WITH [n, r, p, '', 1, 3.14, true, null, [], {}] AS types
      UNWIND range(0, size(types) - 1) AS i
      UNWIND range(0, size(types) - 1) AS j
      WITH types[i] AS lhs, types[j] AS rhs
      WHERE i <> j
      WITH lhs, rhs, lhs <operator> rhs AS result
      WHERE result
      RETURN lhs, rhs
      """
    Then the result should be:
      | lhs   | rhs   |
      | <lhs> | <rhs> |
    And no side effects

    Examples:
      | operator | lhs  | rhs  |
      | <        | 1    | 3.14 |
      | <=       | 1    | 3.14 |
      | >=       | 3.14 | 1    |
      | >        | 3.14 | 1    |