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#!/usr/bin/env python3
# Copyright (c) PLUMgrid, Inc.
# Licensed under the Apache License, Version 2.0 (the "License")
import os
import ctypes as ct
from bcc import BPF
from unittest import main, TestCase, skipUnless
from utils import kernel_version_ge
@skipUnless(kernel_version_ge(4,20), "requires kernel >= 4.20")
class TestQueueStack(TestCase):
def test_stack(self):
text = b"""
BPF_STACK(stack, u64, 10);
"""
b = BPF(text=text)
stack = b[b'stack']
for i in range(10):
stack.push(ct.c_uint64(i))
with self.assertRaises(Exception):
stack.push(ct.c_uint(10))
assert stack.peek().value == 9
for i in reversed(range(10)):
assert stack.pop().value == i
with self.assertRaises(KeyError):
stack.peek()
with self.assertRaises(KeyError):
stack.pop()
for i in reversed(range(10)):
stack.push(ct.c_uint64(i))
# testing itervalues()
for i,v in enumerate(stack.values()):
assert v.value == i
b.cleanup()
def test_queue(self):
text = b"""
BPF_QUEUE(queue, u64, 10);
"""
b = BPF(text=text)
queue = b[b'queue']
for i in range(10):
queue.push(ct.c_uint64(i))
with self.assertRaises(Exception):
queue.push(ct.c_uint(10))
assert queue.peek().value == 0
for i in range(10):
assert queue.pop().value == i
with self.assertRaises(KeyError):
queue.peek()
with self.assertRaises(KeyError):
queue.pop()
for i in range(10):
queue.push(ct.c_uint64(i))
# testing itervalues()
for i,v in enumerate(queue.values()):
assert v.value == i
b.cleanup()
if __name__ == "__main__":
main()
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