From 381defe19fd648b408157434834312013d82827e Mon Sep 17 00:00:00 2001
From: Ned Batchelder <ned@nedbatchelder.com>
Date: Sun, 29 Nov 2009 07:31:30 -0500
Subject: Don't measure mock.py when we measure our coverage.

---
 coverage/codeunit.py | 1 +
 1 file changed, 1 insertion(+)

(limited to 'coverage/codeunit.py')

diff --git a/coverage/codeunit.py b/coverage/codeunit.py
index e310705..6d156da 100644
--- a/coverage/codeunit.py
+++ b/coverage/codeunit.py
@@ -34,6 +34,7 @@ def code_unit_factory(morfs, file_locator, omit_prefixes=None):
     code_units = [CodeUnit(morf, file_locator) for morf in morfs]
     
     if omit_prefixes:
+        assert not isinstance(omit_prefixes, string_class) # common mistake
         prefixes = [file_locator.abs_file(p) for p in omit_prefixes]
         filtered = []
         for cu in code_units:
-- 
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