fixtures.py 文件源码

def formatrepr(self):
        tblines = []
        addline = tblines.append
        stack = [self.request._pyfuncitem.obj]
        stack.extend(map(lambda x: x.func, self.fixturestack))
        msg = self.msg
        if msg is not None:
            # the last fixture raise an error, let's present
            # it at the requesting side
            stack = stack[:-1]
        for function in stack:
            fspath, lineno = getfslineno(function)
            try:
                lines, _ = inspect.getsourcelines(get_real_func(function))
            except (IOError, IndexError, TypeError):
                error_msg = "file %s, line %s: source code not available"
                addline(error_msg % (fspath, lineno+1))
            else:
                addline("file %s, line %s" % (fspath, lineno+1))
                for i, line in enumerate(lines):
                    line = line.rstrip()
                    addline("  " + line)
                    if line.lstrip().startswith('def'):
                        break

        if msg is None:
            fm = self.request._fixturemanager
            available = []
            parentid = self.request._pyfuncitem.parent.nodeid
            for name, fixturedefs in fm._arg2fixturedefs.items():
                faclist = list(fm._matchfactories(fixturedefs, parentid))
                if faclist and name not in available:
                    available.append(name)
            msg = "fixture %r not found" % (self.argname,)
            msg += "\n available fixtures: %s" %(", ".join(sorted(available)),)
            msg += "\n use 'pytest --fixtures [testpath]' for help on them."

        return FixtureLookupErrorRepr(fspath, lineno, tblines, msg, self.argname)