| 340 | |
| 341 | |
| 342 | class _AssertNotWarnsContext(_AssertWarnsContext): |
| 343 | |
| 344 | def __exit__(self, exc_type, exc_value, tb): |
| 345 | self.warnings_manager.__exit__(exc_type, exc_value, tb) |
| 346 | if exc_type is not None: |
| 347 | # let unexpected exceptions pass through |
| 348 | return |
| 349 | try: |
| 350 | exc_name = self.expected.__name__ |
| 351 | except AttributeError: |
| 352 | exc_name = str(self.expected) |
| 353 | for m in self.warnings: |
| 354 | w = m.message |
| 355 | if isinstance(w, self.expected): |
| 356 | self._raiseFailure(f"{exc_name} triggered") |
| 357 | |
| 358 | |
| 359 | class _OrderedChainMap(collections.ChainMap): |
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