diff options
Diffstat (limited to 'coverage/misc.py')
| -rw-r--r-- | coverage/misc.py | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/coverage/misc.py b/coverage/misc.py index 329a8417..4218536d 100644 --- a/coverage/misc.py +++ b/coverage/misc.py @@ -2,10 +2,10 @@ def nice_pair(pair): """Make a nice string representation of a pair of numbers. - + If the numbers are equal, just return the number, otherwise return the pair with a dash between them, indicating the range. - + """ start, end = pair if start == end: @@ -20,10 +20,10 @@ def format_lines(statements, lines): Format a list of line numbers for printing by coalescing groups of lines as long as the lines represent consecutive statements. This will coalesce even if there are gaps between statements. - + For example, if `statements` is [1,2,3,4,5,10,11,12,13,14] and `lines` is [1,2,5,10,11,13,14] then the result will be "1-2, 5-11, 13-14". - + """ pairs = [] i = 0 @@ -47,18 +47,27 @@ def format_lines(statements, lines): def expensive(fn): """A decorator to cache the result of an expensive operation. - + Only applies to methods with no arguments. - + """ attr = "_cache_" + fn.__name__ def _wrapped(self): + """Inner fn that checks the cache.""" if not hasattr(self, attr): setattr(self, attr, fn(self)) return getattr(self, attr) return _wrapped +def bool_or_none(b): + """Return bool(b), but preserve None.""" + if b is None: + return None + else: + return bool(b) + + class CoverageException(Exception): """An exception specific to Coverage.""" pass @@ -66,3 +75,11 @@ class CoverageException(Exception): class NoSource(CoverageException): """Used to indicate we couldn't find the source for a module.""" pass + +class ExceptionDuringRun(CoverageException): + """An exception happened while running customer code. + + Construct it with three arguments, the values from `sys.exc_info`. + + """ + pass |