tests: add some tests for covariant genericity.

[nit.git] / tests / base_isa_gen8.nit

diff --git a/tests/base_isa_gen8.nit b/tests/base_isa_gen8.nit
new file mode 100644 (file)
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--- /dev/null
+++ b/tests/base_isa_gen8.nit
@@ -0,0 +1,64 @@
+# 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 X end
+class Y end
+class Z end
+
+class A[T]
+       fun foo: B[T] do
+               return new B[T]
+       end
+end
+
+class B[U]
+end
+
+class C[V, W] end
+class D[T, U, V] end
+class E[T, U, V, W] end
+
+var ax = new A[X]
+var ay = new A[Y]
+var az = new A[Z]
+
+var b = ax.foo
+
+var cxx = new C[X, X]
+var cxy = new C[X, Y]
+var cxz = new C[X, Z]
+
+var d = new D[X, Y, Z]
+var e = new E[X, Y, Z, Bool]
+
+assert ax isa A[X]
+assert ay isa A[Y]
+assert az isa A[Z]
+
+assert b isa B[Object]
+
+assert cxx isa C[X, X]
+assert cxy isa C[X, Y]
+assert cxz isa C[X, Z]
+
+assert d isa D[X, Y, Z]
+assert e isa E[X, Y, Z, Bool]
+
+
+
+true.output