refactor: move exceptions to their own module

1 files changed, 48 insertions, 0 deletions

diff --git a/coverage/exceptions.py b/coverage/exceptions.py
new file mode 100644
index 00000000..ed96fb21
--- /dev/null
+++ b/coverage/exceptions.py
@@ -0,0 +1,48 @@
+# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
+# For details: https://github.com/nedbat/coveragepy/blob/master/NOTICE.txt
+
+"""Exceptions coverage.py can raise."""
+
+
+class BaseCoverageException(Exception):
+    """The base of all Coverage exceptions."""
+    pass
+
+
+class CoverageException(BaseCoverageException):
+    """An exception raised by a coverage.py function."""
+    pass
+
+
+class NoSource(CoverageException):
+    """We couldn't find the source for a module."""
+    pass
+
+
+class NoCode(NoSource):
+    """We couldn't find any code at all."""
+    pass
+
+
+class NotPython(CoverageException):
+    """A source file turned out not to be parsable Python."""
+    pass
+
+
+class ExceptionDuringRun(CoverageException):
+    """An exception happened while running customer code.
+
+    Construct it with three arguments, the values from `sys.exc_info`.
+
+    """
+    pass
+
+
+class StopEverything(BaseCoverageException):
+    """An exception that means everything should stop.
+
+    The CoverageTest class converts these to SkipTest, so that when running
+    tests, raising this exception will automatically skip the test.
+
+    """
+    pass