tests: add a new unreachable statement relates test

Signed-off-by: Jean Privat <[email protected]>

tests/base_control_flow3.nit

@@ -0,0 +1,49 @@
+# 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.
+
+import kernel
+
+var a
+a = null
+a = 1
+
+a.output
+return
+# Below this line the code is unreachable
+
+var b
+b = null
+b = 1
+a.output
+b.output
+a = b
+b = a
+
+if a == b then
+	a = b
+	b = a
+else
+	a = null
+	b = null
+end
+a.output
+b.output
+var c = a.as(not null)
+var d = b.as(Int)
+var e
+e.output
+
+#alt1#(b+1).output # Error
+b = 1
+#alt1#(b+1).output # Still error

tests/sav/base_control_flow3.res

@@ -0,0 +1,2 @@
+base_control_flow3.nit:25,1--5: Warning: unreachable statement.
+1

tests/sav/base_control_flow3_alt1.res

@@ -0,0 +1,3 @@
+alt/base_control_flow3_alt1.nit:25,1--5: Warning: unreachable statement.
+alt/base_control_flow3_alt1.nit:47,3: Error: method `+` does not exists in `nullable Object`.
+alt/base_control_flow3_alt1.nit:49,3: Error: method `+` does not exists in `nullable Object`.