oeqa: Default to buffer mode for tests

Currently some tests run in buffer mode and some don't. Those that don't can
corrupt stdout/stderr. Switch to using buffer mode everywhere so we're consistent.

If there is useful output on stdout/stderr, it will be displayed if the test
fails.

(From OE-Core rev: 85c1b6fb516aae58240330a0aca659bfafcd3883)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/core/context.py

@@ -58,7 +58,7 @@ class OETestContext(object):
         self.suites = self.loader.discover()
 
     def runTests(self, skips=[]):
-        self.runner = self.runnerClass(self, descriptions=False, verbosity=2)
+        self.runner = self.runnerClass(self, descriptions=False, verbosity=2, buffer=True)
 
         # Dinamically skip those tests specified though arguments
         self.skipTests(skips)

meta/lib/oeqa/core/runner.py

@@ -43,11 +43,6 @@ class OETestResult(_TestResult):
         self.tc = tc
 
     def startTest(self, test):
-        # Allow us to trigger the testcase buffer mode on a per test basis
-        # so stdout/stderr are only printed upon failure. Enables debugging
-        # but clean output
-        if hasattr(test, "buffer"):
-            self.buffer = test.buffer
         super(OETestResult, self).startTest(test)
 
     def logSummary(self, component, context_msg=''):

meta/lib/oeqa/selftest/cases/devtool.py

@@ -78,8 +78,6 @@ def tearDownModule():
 
 class DevtoolBase(OESelftestTestCase):
 
-    buffer = True
-
     def _test_recipe_contents(self, recipefile, checkvars, checkinherits):
         with open(recipefile, 'r') as f:
             invar = None

meta/lib/oeqa/selftest/cases/efibootpartition.py

@@ -11,7 +11,6 @@ from oeqa.utils.commands import bitbake, runqemu, get_bb_var
 class GenericEFITest(OESelftestTestCase):
     """EFI booting test class"""
 
-    buffer = True
     cmd_common = "runqemu nographic serial wic ovmf"
     efi_provider = "systemd-boot"
     image = "core-image-minimal"

meta/lib/oeqa/selftest/cases/imagefeatures.py

@@ -10,8 +10,6 @@ class ImageFeatures(OESelftestTestCase):
     test_user = 'tester'
     root_user = 'root'
 
-    buffer = True
-
     @OETestID(1107)
     def test_non_root_user_can_connect_via_ssh_without_password(self):
         """

meta/lib/oeqa/selftest/cases/runqemu.py

@@ -15,8 +15,6 @@ class RunqemuTests(OESelftestTestCase):
 
     image_is_ready = False
     deploy_dir_image = ''
-    # We only want to print runqemu stdout/stderr if there is a test case failure
-    buffer = True
 
     def setUpLocal(self):
         super(RunqemuTests, self).setUpLocal()