test case for broken switch transform

tests/run/switch.pyx

+__doc__ = u"""
+>>> switch_py(1)
+1
+>>> switch_py(2)
+2
+>>> switch_py(3)
+3
+>>> switch_py(4)
+4
+>>> switch_py(5)
+4
+>>> switch_py(6)
+0
+>>> switch_py(10)
+0
+
+>>> switch_c(1)
+1
+>>> switch_c(2)
+2
+>>> switch_c(3)
+3
+>>> switch_c(4)
+4
+>>> switch_c(5)
+4
+>>> switch_c(6)
+0
+>>> switch_c(10)
+0
+"""
+
+def switch_py(x):
+    if x == 1:
+        return 1
+    elif 2 == x:
+        return 2
+    elif x in [3]:
+        return 3
+    elif x in [4,5,7,8]:
+        return 4
+    else:
+        return 0
+    return -1
+
+def switch_c(int x):
+    if x == 1:
+        return 1
+    elif 2 == x:
+        return 2
+    elif x in [3]:
+        return 3
+    elif x in [4,5,7,8]:
+        return 4
+    else:
+        return 0
+    return -1