jython - 将 pytest 与 Jython 一起使用

Question

我正在尝试在 Jython 上使用 pytest。我一开始就被卡住了。

我已经使用easy_install成功安装了pytest包:

$ ./jython easy_install pytest

当我尝试从这个 page 运行示例时，事情出错了。我收到了一份非常长的失败报告，如下所示。有人知道为什么会这样吗？

py.test-jython

============================ 测试 session 开始 ================== ============
平台 java1.6.0_37 -- Python 2.5.3 -- pytest-2.3.2
收集到 1 件元素

test_sample.py F

====================================失败============== ======================
_________________ test_answer __________________

def test_answer():

  assert func(3) == 5

test_sample.py:5:

self = AssertionError()

def __init__(self, *args):
    BuiltinAssertionError.__init__(self, *args)
    if args:
        try:
            self.msg = str(args[0])
        except py.builtin._sysex:
            raise
        except:
            self.msg = "<[broken __repr__] %s at %0xd>" %(
                args[0].__class__, id(args[0]))
    else:
        f = py.code.Frame(sys._getframe(1))
        try:
            source = f.code.fullsource
            if source is not None:
                try:
                    source = source.getstatement(f.lineno, assertion=True)
                except IndexError:
                    source = None
                else:
                    source = str(source.deindent()).strip()
        except py.error.ENOENT:
            source = None
            # this can also occur during reinterpretation, when the
            # co_filename is set to "<run>".
        if source:

          self.msg = reinterpret(source, f, should_fail=True)

../jython2.5.3/Lib/site-packages/pytest-2.3.2-py2.5.egg/_pytest/assertion/reinterpret.py:32:

源 = 'assert func(3) == 5', 框架 =
should_fail = 真

def interpret(source, frame, should_fail=False):
    mod = ast.parse(source)
    visitor = DebugInterpreter(frame)
    try:

      visitor.visit(mod)

../jython2.5.3/Lib/site-packages/pytest-2.3.2-py2.5.egg/_pytest/assertion/newinterpret.py:49:

.
.
.

self = <_pytest.assertion.newinterpret.DebugInterpreter 对象在 0x4>
姓名 = 姓名

def visit_Name(self, name):

  explanation, result = self.generic_visit(name)

../jython2.5.3/Lib/site-packages/pytest-2.3.2-py2.5.egg/_pytest/assertion/newinterpret.py:147:

self = <_pytest.assertion.newinterpret.DebugInterpreter 对象在 0x4>
节点 = 名称

def generic_visit(self, node):
    # Fallback when we don't have a special implementation.
    if _is_ast_expr(node):
        mod = ast.Expression(node)
        co = self._compile(mod)
        try:
            result = self.frame.eval(co)
        except Exception:
            raise Failure()
        explanation = self.frame.repr(result)
        return explanation, result
    elif _is_ast_stmt(node):
        mod = ast.Module([node])
        co = self._compile(mod, "exec")
        try:
            self.frame.exec_(co)
        except Exception:
            raise Failure()
        return None, None
    else:

      raise AssertionError("can't handle %s" %(node,))

E AssertionError: can't handle Name

../jython2.5.3/Lib/site-packages/pytest-2.3.2-py2.5.egg/_pytest/assertion/newinterpret.py:134: AssertionError
============================ 1 次失败在 0.55 秒内 ================== ==========

Answer 1

Pytest 有解决 jython 缺少 AST 实现的方法，请参阅 issue1479 .我只是将 pytest 方面的解决方法扩展到 jython-2.5.3。您可以使用以下命令安装 pytest 的开发候选人:

pip install -i http://pypi.testrun.org -U pytest

并且应该至少使用“py.test-jython --version”获得版本 2.3.4.dev1 并获得使用 jython-2.5.3 的断言。