fix problem with unicode in writing failure representations to terminal, thanks ThomasWaldmann

CHANGELOG

@@ -1,12 +1,14 @@
 Changes between 2.2.4 and 2.2.5.dev
 -----------------------------------
 
+- catch unicode-issues when writing failure representations
+  to terminal to prevent the whole session from crashing
 - fix xfail/skip confusion: a skip-mark or an imperative pytest.skip
   will now take precedence before xfail-markers because we
   can't determine xfail/xpass status in case of a skip. see also:
   http://stackoverflow.com/questions/11105828/in-py-test-when-i-explicitly-skip-a-test-that-is-marked-as-xfail-how-can-i-get
 
-- always report installed 3rd party plugins
+- always report installed 3rd party plugins in the header of a test run
 
 - fix issue160: a failing setup of an xfail-marked tests should
   be reported as xfail (not xpass)

_pytest/runner.py

@@ -154,7 +154,10 @@ class BaseReport(object):
         if hasattr(longrepr, 'toterminal'):
             longrepr.toterminal(out)
         else:
-            out.line(str(longrepr))
+            try:
+                out.line(longrepr)
+            except UnicodeEncodeError:
+                out.line("<unprintable longrepr>")
 
     passed = property(lambda x: x.outcome == "passed")
     failed = property(lambda x: x.outcome == "failed")
@@ -279,7 +282,7 @@ class CollectErrorRepr(TerminalRepr):
     def __init__(self, msg):
         self.longrepr = msg
     def toterminal(self, out):
-        out.line(str(self.longrepr), red=True)
+        out.line(self.longrepr, red=True)
 
 class SetupState(object):
     """ shared state for setting up/tearing down test items or collectors. """

_pytest/terminal.py

@@ -38,13 +38,14 @@ def pytest_configure(config):
     stdout = py.std.sys.stdout
     if hasattr(os, 'dup') and hasattr(stdout, 'fileno'):
         try:
-            newfd = os.dup(stdout.fileno())
-            #print "got newfd", newfd
+            newstdout = py.io.dupfile(stdout, buffering=1,
+                                      encoding=stdout.encoding)
         except ValueError:
             pass
         else:
-            stdout = os.fdopen(newfd, stdout.mode, 1)
-            config._cleanup.append(lambda: stdout.close())
+            config._cleanup.append(lambda: newstdout.close())
+            assert stdout.encoding  == newstdout.encoding
+            stdout = newstdout
 
     reporter = TerminalReporter(config, stdout)
     config.pluginmanager.register(reporter, 'terminalreporter')

testing/test_runner.py

@@ -456,3 +456,21 @@ def test_pytest_cmdline_main(testdir):
     ret = popen.wait()
     assert ret == 0
 
+
+def test_unicode_in_longrepr(testdir):
+    testdir.makeconftest("""
+        import py
+        def pytest_runtest_makereport(__multicall__):
+            rep = __multicall__.execute()
+            if rep.when == "call":
+                rep.longrepr = py.builtin._totext("\\xc3\\xa4", "utf8")
+            return rep
+    """)
+    testdir.makepyfile("""
+        def test_out():
+            assert 0
+    """)
+    result = testdir.runpytest()
+    assert result.ret == 1
+    assert "UnicodeEncodeError" not in result.stderr.str()
+