Add a dedicated test for and/or operators in a boolean context.

tests/run/if_and_or.pyx

+# mode: run
+# tag: if, and, or
+
+def if_x(x):
+    """
+    >>> if_x(0)
+    2
+    >>> if_x(1)
+    1
+    """
+    if x:
+        return 1
+    else:
+        return 2
+
+def if_not(x):
+    """
+    >>> if_not(0)
+    1
+    >>> if_not(1)
+    2
+    """
+    if not x:
+        return 1
+    else:
+        return 2
+
+
+def if_and(a, b):
+    """
+    >>> if_and(3, 0)
+    2
+    >>> if_and(0, 3)
+    2
+    >>> if_and(0, 0)
+    2
+    >>> if_and(3, 3)
+    1
+    """
+    if a and b:
+        return 1
+    else:
+        return 2
+
+
+def if_not_and(a, b):
+    """
+    >>> if_not_and(3, 0)
+    1
+    >>> if_not_and(0, 3)
+    1
+    >>> if_not_and(0, 0)
+    1
+    >>> if_not_and(3, 3)
+    2
+    """
+    if not (a and b):
+        return 1
+    else:
+        return 2
+
+
+def if_or(a, b):
+    """
+    >>> if_or(3, 0)
+    1
+    >>> if_or(0, 3)
+    1
+    >>> if_or(0, 0)
+    2
+    >>> if_or(3, 3)
+    1
+    """
+    if a or b:
+        return 1
+    else:
+        return 2
+
+
+def if_not_or(a, b):
+    """
+    >>> if_not_or(3, 0)
+    2
+    >>> if_not_or(0, 3)
+    2
+    >>> if_not_or(0, 0)
+    1
+    >>> if_not_or(3, 3)
+    2
+    """
+    if not (a or b):
+        return 1
+    else:
+        return 2
+
+
+def if_and_or(a, b, c, d):
+    """
+    >>> if_and_or(3, 0, 0, 3)
+    1
+    >>> if_and_or(0, 3, 0, 3)
+    1
+    >>> if_and_or(0, 3, 3, 0)
+    1
+    >>> if_and_or(0, 3, 3, 0)
+    1
+    >>> if_and_or(0, 0, 0, 0)
+    2
+    >>> if_and_or(0, 3, 0, 0)
+    2
+    >>> if_and_or(0, 0, 3, 0)
+    2
+    >>> if_and_or(0, 0, 0, 3)
+    2
+    """
+    if (a or b) and (c or d):
+        return 1
+    else:
+        return 2