Source code for cocotb.result

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# TODO: Could use cStringIO?
import traceback
import sys
import warnings
from io import StringIO, BytesIO
from cocotb import _py_compat

"""Exceptions and functions for simulation result handling."""

[docs]def raise_error(obj, msg): """Create a :exc:`TestError` exception and raise it after printing a traceback. .. deprecated:: 1.3 Use ``raise TestError(msg)`` instead of this function. A stacktrace will be printed by cocotb automatically if the exception is unhandled. Args: obj: Object with a log method. msg (str): The log message. """ warnings.warn( "``raise_error`` is deprecated - use ``raise TestError(msg)`` (or any " "other exception type) instead", DeprecationWarning, stacklevel=2) _raise_error(obj, msg)
def _raise_error(obj, msg): exc_info = sys.exc_info() # Python 2.6 cannot use named access if sys.version_info[0] >= 3: buff = StringIO() traceback.print_exception(*exc_info, file=buff) else: buff_bytes = BytesIO() traceback.print_exception(*exc_info, file=buff_bytes) buff = StringIO(buff_bytes.getvalue().decode("UTF-8")) obj.log.error("%s\n%s" % (msg, buff.getvalue())) exception = TestError(msg) exception.stderr.write(buff.getvalue()) raise exception
[docs]def create_error(obj, msg): """Like :func:`raise_error`, but return the exception rather than raise it, simply to avoid too many levels of nested `try/except` blocks. .. deprecated:: 1.3 Use ``TestError(msg)`` directly instead of this function. Args: obj: Object with a log method. msg (str): The log message. """ warnings.warn( "``create_error`` is deprecated - use ``TestError(msg)`` directly " "(or any other exception type) instead", DeprecationWarning, stacklevel=2) try: # use the private version to avoid multiple warnings _raise_error(obj, msg) except TestError as error: return error return TestError("Creating error traceback failed")
[docs]class ReturnValue(Exception): """Helper exception needed for Python versions prior to 3.3.""" def __init__(self, retval): self.retval = retval
[docs]class TestComplete(Exception): """Exception showing that the test was completed. Sub-exceptions detail the exit status.""" def __init__(self, *args, **kwargs): super(TestComplete, self).__init__(*args, **kwargs) self.stdout = StringIO() self.stderr = StringIO()
[docs]class ExternalException(Exception): """Exception thrown by :class:`cocotb.external` functions.""" def __init__(self, exception): self.exception = exception
[docs]class TestError(TestComplete): """Exception showing that the test was completed with severity Error.""" pass
[docs]class TestFailure(TestComplete, AssertionError): """Exception showing that the test was completed with severity Failure.""" pass
[docs]class TestSuccess(TestComplete): """Exception showing that the test was completed successfully.""" pass
[docs]class SimFailure(TestComplete): """Exception showing that the simulator exited unsuccessfully.""" pass
[docs]class SimTimeoutError(_py_compat.TimeoutError): """Exception for when a timeout, in terms of simulation time, occurs.""" pass