Run a single method, either a test method or fixture.
| Parameters | suppress | Any warnings to suppress, as defined by the suppress attribute on this method, test case, or the module it is defined in. |
| todo | Any expected failure or failures, as defined by the todo attribute on this method, test case, or the module it is defined in. |
| method | The method to run. |
| result | The TestResult instance to which to report results. |
| Returns | True if the method fails and no further method/fixture calls should be made, False otherwise. |