Merge master into features

AUTHORS

@@ -261,6 +261,7 @@ Tim Hoffmann
 Tim Strazny
 Tom Dalton
 Tom Viner
+Tomáš Gavenčiak
 Tomer Keren
 Trevor Bekolay
 Tyler Goodlet

changelog/6557.bugfix.rst

@@ -0,0 +1 @@
+Make capture output streams ``.write()`` method return the same return value from original streams.

codecov.yml

@@ -1,7 +1 @@
-coverage:
-  status:
-    project: true
-    patch: true
-    changes: true
-
 comment: off

src/_pytest/capture.py

@@ -427,7 +427,7 @@ def write(self, obj):
             raise TypeError(
                 "write() argument must be str, not {}".format(type(obj).__name__)
             )
-        self.buffer.write(obj)
+        return self.buffer.write(obj)
 
     def writelines(self, linelist):
         data = "".join(linelist)

src/_pytest/main.py

@@ -76,7 +76,7 @@ def pytest_addoption(parser):
         dest="maxfail",
         const=1,
         help="exit instantly on first error or failed test.",
-    ),
+    )
     group._addoption(
         "--maxfail",
         metavar="num",
@@ -123,7 +123,7 @@ def pytest_addoption(parser):
         "--co",
         action="store_true",
         help="only collect tests, don't execute them.",
-    ),
+    )
     group.addoption(
         "--pyargs",
         action="store_true",

testing/test_capture.py

@@ -1532,3 +1532,8 @@ def test_fails():
     result_with_capture.stdout.fnmatch_lines(
         ["E * TypeError: write() argument must be str, not bytes"]
     )
+
+
+def test_stderr_write_returns_len(capsys):
+    """Write on Encoded files, namely captured stderr, should return number of characters written."""
+    assert sys.stderr.write("Foo") == 3