[OE-core] [PATCH] oeqa/core/runner: dump stdout and stderr of each test case

[Mardegan, Alberto]

Some CI pipelines might perform further processing of the test output
(for instance, to plot some metrics into a chart). However, Since `thud`
we switched away from the XML-based jUnit reporting, and at the same
time we lost the ability of collecting the stdout and stderr of the
various tests.

We now restore this functionality by adding `stdout` and `stderr` keys
to the JSON reports.

Signed-off-by: Alberto Mardegan <amardegan at luxoft.com>
---
 meta/classes/testimage.bbclass |  3 ++-
 meta/lib/oeqa/core/runner.py   | 20 ++++++++++++++++----
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/meta/classes/testimage.bbclass b/meta/classes/testimage.bbclass
index ff1c53b93e..d0f4a77ff9 100644
--- a/meta/classes/testimage.bbclass
+++ b/meta/classes/testimage.bbclass
@@ -316,7 +316,8 @@ def testimage_main(d):
     configuration = get_testimage_configuration(d, 'runtime', machine)
     results.logDetails(get_testimage_json_result_dir(d),
                        configuration,
-                       get_testimage_result_id(configuration))
+                       get_testimage_result_id(configuration),
+                       dump_streams=d.getVar('TEST_WRITE_OUTPUT'))
     results.logSummary(pn)
     if not results.wasSuccessful():
         bb.fatal('%s - FAILED - check the task log and the ssh log' % pn, forcelog=True)
diff --git a/meta/lib/oeqa/core/runner.py b/meta/lib/oeqa/core/runner.py
index df88b85f1c..478b7b6683 100644
--- a/meta/lib/oeqa/core/runner.py
+++ b/meta/lib/oeqa/core/runner.py
@@ -7,6 +7,7 @@ import unittest
 import logging
 import re
 import json
+import sys

 from unittest import TextTestResult as _TestResult
 from unittest import TextTestRunner as _TestRunner
@@ -45,6 +46,9 @@ class OETestResult(_TestResult):

         self.tc = tc

+        # stdout and stderr for each test case
+        self.logged_output = {}
+
     def startTest(self, test):
         # May have been set by concurrencytest
         if test.id() not in self.starttime:
@@ -53,6 +57,9 @@ class OETestResult(_TestResult):

     def stopTest(self, test):
         self.endtime[test.id()] = time.time()
+        if self.buffer:
+            self.logged_output[test.id()] = (
+                    sys.stdout.getvalue(), sys.stderr.getvalue())
         super(OETestResult, self).stopTest(test)
         if test.id() in self.progressinfo:
             self.tc.logger.info(self.progressinfo[test.id()])
@@ -118,7 +125,8 @@ class OETestResult(_TestResult):
         self.successes.append((test, None))
         super(OETestResult, self).addSuccess(test)

-    def logDetails(self, json_file_dir=None, configuration=None, result_id=None):
+    def logDetails(self, json_file_dir=None, configuration=None, result_id=None,
+            dump_streams=False):
         self.tc.logger.info("RESULTS:")

         result = {}
@@ -144,10 +152,14 @@ class OETestResult(_TestResult):
             if status not in logs:
                 logs[status] = []
             logs[status].append("RESULTS - %s - Testcase %s: %s%s" % (case.id(), oeid, status, t))
+            report = {'status': status}
             if log:
-                result[case.id()] = {'status': status, 'log': log}
-            else:
-                result[case.id()] = {'status': status}
+                report['log'] = log
+            if dump_streams and case.id() in self.logged_output:
+                (stdout, stderr) = self.logged_output[case.id()]
+                report['stdout'] = stdout
+                report['stderr'] = stderr
+            result[case.id()] = report

         for i in ['PASSED', 'SKIPPED', 'EXPECTEDFAIL', 'ERROR', 'FAILED', 'UNKNOWN']:
             if i not in logs:
--
2.17.1

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