Add new acceptance test scenario 048

examples/acceptance_tests/048/lib/tests.ak

@@ -0,0 +1,33 @@
+test foo_1() {
+  let a = False
+  when a is {
+    a if a -> False
+    _ -> True
+  }
+}
+
+test foo_2() {
+  let point = (14, 42)
+  when point is {
+    (x, _) if x > 100 -> False
+    (x, _) if x > 10 -> True
+    _ -> False
+  }
+}
+
+test foo_3() {
+  let point = (14, 42)
+  when point is {
+    (x, y) if x == 14 && y <= 100 -> True
+    _ -> False
+  }
+}
+
+test foo_4() {
+  let a = False
+  let point = (14, 42)
+  when point is {
+    (x, y) if !a -> x + y == 56
+    _ -> False
+  }
+}