Aesthetic changes

httpie/context.py

@@ -112,14 +112,12 @@ class Environment:
                     self.log_error(e, level='warning')
         return config
 
-    
     @property
     def devnull(self) -> IO:
         if self._devnull is None:
             self._devnull = open(os.devnull, 'w+')
         return self._devnull
 
-    #For ease of testing
     @devnull.setter
     def devnull(self, value):
         self._devnull = value

tests/test_downloads.py

@@ -199,4 +199,3 @@ class TestDownloads:
         assert r.stderr == ''
         assert env.devnull == env.stderr
         assert env.devnull == env.stdout
-

tests/test_output.py

@@ -54,7 +54,7 @@ class TestQuietFlag:
         assert env.stdout == env.devnull
         assert env.stderr == env.devnull
         assert r.stderr == ''
-        assert HTTP_OK in r.devnull.decode()
+        assert HTTP_OK in r.devnull
         assert str(r) == ''
 
     @mock.patch('httpie.cli.argtypes.AuthCredentials._getpass',
@@ -65,7 +65,7 @@ class TestQuietFlag:
         env = MockEnvironment(stdin_isatty=True, stdout_isatty=True)
         env.devnull = io.BytesIO()
         r = http('--quiet', '--auth', 'user', 'GET', httpbin.url + '/basic-auth/user/password', env=env)
-        assert HTTP_OK in r.devnull.decode()
+        assert HTTP_OK in r.devnull
         assert env.stdout == env.devnull
         assert env.stderr == env.devnull
         assert str(r) == ''
@@ -80,6 +80,7 @@ class TestQuietFlag:
         assert str(r) == ''
         assert r.stderr == ''
 
+
 class TestVerboseFlag:
     def test_verbose(self, httpbin):
         r = http('--verbose',

tests/utils.py

@@ -163,20 +163,21 @@ def http(
     # noinspection PyUnresolvedReferences
     """
     Run HTTPie and capture stderr/out and exit status.
-    Content writtent to devnull will be captured if 
-    env.devnull in env does not correspond to os.devnull file. 
+    Content writtent to devnull will be captured only if
+    env.devnull is set manually.
 
     Invoke `httpie.core.main()` with `args` and `kwargs`,
     and return a `CLIResponse` subclass instance.
 
     The return value is either a `StrCLIResponse`, or `BytesCLIResponse`
-    if unable to decode the output. 
+    if unable to decode the output. Devnull is string when possible,
+    bytes otherwise.
 
     The response has the following attributes:
 
         `stdout` is represented by the instance itself (print r)
         `stderr`: text written to stderr
-        `devnull` text written to devnull. String if possible bytes otherwise
+        `devnull` text written to devnull.
         `exit_status`: the exit status
         `json`: decoded JSON (if possible) or `None`
 
@@ -265,6 +266,10 @@ def http(
         else:
             r = StrCLIResponse(output)
 
+        try:
+            devnull_output = devnull_output.decode('utf8')
+        except Exception:
+            pass
 
         r.devnull = devnull_output
         r.stderr = stderr.read()