tests/contracts_expects_3.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #     http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 # Check if the adding expects contract in a redefinition on an existing method return a warning
  16
  17 class MyClass
  18         fun foo(x: Int)
  19         do
  20                 print "Good"
  21         end
  22 end
  23
  24 class SubClass
  25         super MyClass
  26
  27         redef fun foo(x: Int)
  28         is
  29                 expects(x == 0)
  30         do
  31                 if x != 0 then print "Good"
  32         end
  33 end
  34
  35 class SubSubClass
  36         super SubClass
  37
  38         redef fun foo(x: Int)
  39         do
  40                 if x != 0 then print "Good"
  41         end
  42 end
  43
  44 var first = new MyClass
  45 first.foo(1) # OK
  46 var sub = new SubClass
  47 sub.foo(0) # OK
  48 var subsub = new SubSubClass
  49 subsub.foo(1) # Ok