tests: add some tests on virtual types.

[nit.git] / tests / base_isa_vt1.nit

diff --git a/tests/base_isa_vt1.nit b/tests/base_isa_vt1.nit
new file mode 100644 (file)
index 0000000..0cdbb3a
--- /dev/null
+++ b/tests/base_isa_vt1.nit
@@ -0,0 +1,48 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2012 Alexandre Terrasa <alexandre@moz-code.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.
+
+import base_minimal
+
+class A
+       type T: Bool
+       type U: T
+       type V: U
+
+       fun testT(o: Object): Bool do
+               return o isa T
+       end
+
+       fun testU(o: Object): Bool do
+               return o isa U
+       end
+
+       fun testV(o: Object): Bool do
+               return o isa V
+       end
+end
+
+var a = new A
+
+assert a.testT(true)
+assert not a.testT(a)
+
+assert a.testU(true)
+assert not a.testU(a)
+
+assert a.testV(true)
+assert not a.testV(a)
+
+true.output