tests: adding contract testing files

[nit.git] / tests / contracts_ensures_4.nit

diff --git a/tests/contracts_ensures_4.nit b/tests/contracts_ensures_4.nit
new file mode 100644 (file)
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--- /dev/null
+++ b/tests/contracts_ensures_4.nit
@@ -0,0 +1,40 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# 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
+# limitations under the License.
+
+# Check the result with the super call
+
+class MyClass
+       fun foo(x: Int): Bool
+       is
+               ensures(x > 0, result)
+       do
+               return true
+       end
+end
+
+class MySubClass
+       super MyClass
+
+       redef fun foo(x: Int)
+       is
+               ensures(not result)
+       do
+               return super
+       end
+end
+
+var first = new MyClass
+first.foo(1)
+var second = new MySubClass
+second.foo(2) #Fail