Added test for & op

Signed-off-by: Ron Nuriel <[email protected]>

Author: ronnuriel

integration_tests/expr_01.py

@@ -4,13 +4,23 @@
 def add(x: i32, y: i32) -> i32:
     return x + y
 
+@inline
+def and_op(x: i32, y: i32) -> i32:
+    return x & y
+
 def main0():
-    x: i32; y: i32
+    x: i32
+    y: i32
+    z: i32
     x = (2+3)*5
     y = add(x, 2)*2
     assert x == 25
     assert y == 54
 
+    z = and_op(x, y)
+    assert z == 16
+
+
 main0()
 
 # Not implemented yet in LPython: