Also pass stderr output to summary method

While pytest sends everything in stdout, some other programs send on stderr.

nxdtest/__init__.py

@@ -231,7 +231,7 @@ def main():
             # postprocess output, if we can
             if t.summaryf is not None:
                 try:
-                    summary = t.summaryf(stdout)
+                    summary = t.summaryf(stdout, stderr)
                 except:
                     bad = b(traceback.format_exc())
                     bstderr.write(bad)
@@ -357,7 +357,7 @@ class LocalTestResultLine:
 # support for well-known summary functions
 class PyTest:
     @staticmethod
-    def summary(out): # -> status_dict
+    def summary(out, err): # -> status_dict
         # end of output is like
         # ================ 1 failed, 1 passed, 12 skipped in 0.39 seconds ================
         # ...

nxdtest/nxdtest_pytest_test.py

@@ -23,9 +23,9 @@ from nxdtest import _test_result_summary, PyTest
 import pytest
 from golang import b
 
-# [] of (name, out, summaryok)
+# [] of (name, out, err, summaryok)
 testv = []
-def case1(name, out, summaryok): testv.append((name, out, summaryok))
+def case1(name, out, err, summaryok): testv.append((name, out, err, summaryok))
 
 case1('ok+xfail', b("""\
 ============================= test session starts ==============================
@@ -41,6 +41,7 @@ zodbtools/test/test_zodb.py ........                                     [100%]
 
 =============== 41 passed, 2 xfailed, 1 warnings in 4.62 seconds ===============
 """),
+b(''),
 '?\ttestname\t1.000s\t# 43t ?e ?f ?s')
 
 case1('ok+fail', b("""\
@@ -113,6 +114,7 @@ E         Use -v to get the full diff
 golang/time_test.py:106: AssertionError
 =============== 1 failed, 98 passed, 13 skipped in 26.85 seconds ===============
 """),
+b(''),
 '?\ttestname\t1.000s\t# 112t ?e 1f 13s')
 
 case1('ok+tailtext', b("""\
@@ -131,12 +133,13 @@ wcfs: 2020/11/08 12:26:38 /tmp/testdb_fs.Z9IvT0/1.fs: watcher: stat /tmp/testdb_
 wcfs: 2020/11/08 12:26:38 /tmp/testdb_fs.B3rbby/1.fs: watcher: stat /tmp/testdb_fs.B3rbby/1.fs: use of closed file
 # unmount/stop wcfs pid39595 @ /tmp/wcfs/d0b5d036a2cce47fe73003cf2d9f0b22c7043817
 """),
+b(''),
 '?\ttestname\t1.000s\t# 55t ?e ?f ?s')
 
 
-@pytest.mark.parametrize("name,out,summaryok", testv)
-def test_pytest_summary(name, out, summaryok):
+@pytest.mark.parametrize("name,out,err,summaryok", testv)
+def test_pytest_summary(name, out, err, summaryok):
     kw = {'duration': 1.0}
-    kw.update(PyTest.summary(out))
+    kw.update(PyTest.summary(out, err))
     summary = _test_result_summary('testname', kw)
     assert summary == summaryok