Set coverage path globs on a per-Test basis instead of in main().

scripts/slave/unittests/recipe_simulation_test.py

Index: scripts/slave/unittests/recipe_simulation_test.py
diff --git a/scripts/slave/unittests/recipe_simulation_test.py b/scripts/slave/unittests/recipe_simulation_test.py
index 5e82876977e62b3ec41207c82c0ed1bc5cb12f5c..c40422ad58111de87585e5f7242cc47da2fc7185 100755
--- a/scripts/slave/unittests/recipe_simulation_test.py
+++ b/scripts/slave/unittests/recipe_simulation_test.py
@@ -55,10 +55,26 @@ def RunRecipe(test_data):
   return expect_tests.Result(ret)
 
 
+def test_gen_coverage():
+  return (
+      [os.path.join(x, '*') for x in recipe_util.RECIPE_DIRS()] +
+      [os.path.join(x, '*', 'example.py') for x in recipe_util.MODULE_DIRS()] +
+      [os.path.join(x, '*', 'test_api.py') for x in recipe_util.MODULE_DIRS()]
+  )
+
+@expect_tests.covers(test_gen_coverage)
 def GenerateTests():
+  cover_mods = []
+  for mod_dir_base in recipe_util.MODULE_DIRS():
+    if os.path.isdir(mod_dir_base):
+      cover_mods.append(os.path.join(mod_dir_base, '*', '*api.py'))
+
   for recipe_path, recipe_name in recipe_loader.loop_over_recipes():
     recipe = recipe_loader.load_recipe(recipe_name)
     test_api = recipe_loader.create_test_api(recipe.DEPS)
+
+    covers = cover_mods + [recipe_path]
+
     for test_data in recipe.GenTests(test_api):
       root, name = os.path.split(recipe_path)
       name = os.path.splitext(name)[0]
@@ -70,6 +86,7 @@ def GenerateTests():
           expect_tests.FuncCall(RunRecipe, test_data),
           expect_dir=expect_path,
           expect_base=test_data.name,
+          covers=covers,
           break_funcs=(recipe.GenSteps,)
       )
 
@@ -84,9 +101,4 @@ if __name__ == '__main__':
       logging.warn("Ignoring %s environment variable." % env_var)
       os.environ.pop(env_var)
 
-  expect_tests.main('recipe_simulation_test', GenerateTests, (
-      [os.path.join(x, '*') for x in recipe_util.RECIPE_DIRS()] +
-      [os.path.join(x, '*', '*api.py') for x in recipe_util.MODULE_DIRS()]
-  ), (
-      [os.path.join(x, '*', '*config.py') for x in recipe_util.MODULE_DIRS()]
-  ))
+  expect_tests.main('recipe_simulation_test', GenerateTests)