Suppress tests output

tests/__main__.py

@@ -20,6 +20,7 @@ else:
 cmd = (
     "nosetests -v --processes=-1 --process-timeout=500 --cover-inclusive "
     "--cover-erase --cover-package=dvc --with-coverage --with-flaky "
+    "--logging-clear-handlers "
     "{scope} ".format(scope=scope)
 )
 check_call(cmd, shell=True)

tests/test_data_cloud.py

@@ -11,6 +11,7 @@ import copy
 
 from dvc.state import State
 from mock import patch
+from tests.utils.logger import MockLoggerHandlers
 
 import dvc.logger as logger
 from dvc.utils.compat import str
@@ -637,15 +638,16 @@ class TestWarnOnOutdatedStage(TestDvc):
         with open(stage_file_path, "w") as stage_file:
             yaml.dump(content, stage_file)
 
-        logger.logger.handlers[0].stream = StringIO()
-        self.main(["status", "-c"])
-        self.assertIn(
-            "Warning: Output 'bar'(Stage: 'bar.dvc') is "
-            "missing version info. Cache for it will not be "
-            "collected. Use dvc repro to get your pipeline up to "
-            "date.",
-            logger.logger.handlers[0].stream.getvalue(),
-        )
+        with MockLoggerHandlers(logger.logger):
+            logger.logger.handlers[0].stream = StringIO()
+            self.main(["status", "-c"])
+            self.assertIn(
+                "Warning: Output 'bar'(Stage: 'bar.dvc') is "
+                "missing version info. Cache for it will not be "
+                "collected. Use dvc repro to get your pipeline up to "
+                "date.",
+                logger.logger.handlers[0].stream.getvalue(),
+            )
 
     def test(self):
         self.color_patch.start()

tests/test_import.py

@@ -10,6 +10,8 @@ from dvc.main import main
 from mock import patch, mock_open, call
 from tests.basic_env import TestDvc
 from tests.utils.httpd import StaticFileServer
+from tests.utils.logger import MockLoggerHandlers
+
 
 from dvc.utils.compat import StringIO
 
@@ -53,21 +55,22 @@ class TestFailedImportMessage(TestDvc):
 
     @patch("dvc.command.imp.urlparse")
     def _test(self, imp_urlparse_patch):
-        logger.logger.handlers[1].stream = StringIO()
-        page_address = "http://somesite.com/file_name"
+        with MockLoggerHandlers(logger.logger):
+            logger.logger.handlers[1].stream = StringIO()
+            page_address = "http://somesite.com/file_name"
 
-        def dvc_exception(*args, **kwargs):
-            raise DvcException("message")
+            def dvc_exception(*args, **kwargs):
+                raise DvcException("message")
 
-        imp_urlparse_patch.side_effect = dvc_exception
-        main(["import", page_address])
-        self.assertIn(
-            "Error: failed to import "
-            "http://somesite.com/file_name. You could also try "
-            "downloading it manually and adding it with `dvc add` "
-            "command.",
-            logger.logger.handlers[1].stream.getvalue(),
-        )
+            imp_urlparse_patch.side_effect = dvc_exception
+            main(["import", page_address])
+            self.assertIn(
+                "Error: failed to import "
+                "http://somesite.com/file_name. You could also try "
+                "downloading it manually and adding it with `dvc add` "
+                "command.",
+                logger.logger.handlers[1].stream.getvalue(),
+            )
 
 
 class TestInterruptedDownload(TestDvc):

tests/test_logger.py

@@ -14,6 +14,10 @@ class TestLogger(TestCase):
     color_patch = patch.object(logger, "colorize", new=lambda x, color="": x)
 
     def setUp(self):
+        logger.logger.handlers = [
+            logger.logging.StreamHandler(),
+            logger.logging.StreamHandler(),
+        ]
         logger.logger.handlers[0].stream = StringIO()
         logger.logger.handlers[1].stream = StringIO()
         logger.set_default_level()

tests/utils/logger.py

@@ -0,0 +1,20 @@
+import logging
+
+
+class MockLoggerHandlers(object):
+    def __init__(self, l, num=2):
+        self._logger = l
+        self._handlers = l.handlers
+        self._num = num
+
+    def __enter__(self):
+        self._logger.handlers = [
+            logging.FileHandler("tmp{}.log".format(i))
+            for i in range(self._num)
+        ]
+        return self
+
+    def __exit__(self, exc_type=None, exc_val=None, exc_tb=None):
+        for h in self._logger.handlers:
+            h.close()
+        self._logger.handlers = self._handlers