1 files changed, 26 insertions, 0 deletions
diff --git a/tests/source/updown.scade b/tests/source/updown.scade
new file mode 100644
index 0000000..089293a
--- /dev/null
+++ b/tests/source/updown.scade
@@ -0,0 +1,26 @@
+const bound: int = 7;
+
+node updown() returns(probe x: int)
+var last_x: int;
+let
+    last_x = 0 -> pre x;
+    guarantee x_bounded: x >= -bound and x <= bound;
+    automaton
+        initial state UP
+        let x = last_x + 1; tel
+        until if x >= bound resume DOWN;
+
+        state DOWN
+        let x = last_x - 1; tel
+        until if x <= -bound resume UP;
+
+    returns x;
+tel
+
+node test(i: int) returns(a, b, c: int; exit: bool)
+let
+    exit = i >= 30;
+    a = updown();
+    b = 0;
+    c = 0;
+tel