Pass byte strings straight through LogPrinter

tests/unit/log_printer_test.py

@@ -0,0 +1,57 @@
+from __future__ import unicode_literals
+from __future__ import absolute_import
+import os
+
+from fig.cli.log_printer import LogPrinter
+from .. import unittest
+
+
+class LogPrinterTest(unittest.TestCase):
+    def test_single_container(self):
+        def reader(*args, **kwargs):
+            yield "hello\nworld"
+
+        container = MockContainer(reader)
+        output = run_log_printer([container])
+
+        self.assertIn('hello', output)
+        self.assertIn('world', output)
+
+    def test_unicode(self):
+        glyph = u'\u2022'.encode('utf-8')
+
+        def reader(*args, **kwargs):
+            yield glyph + b'\n'
+
+        container = MockContainer(reader)
+        output = run_log_printer([container])
+
+        self.assertIn(glyph, output)
+
+
+def run_log_printer(containers):
+    r, w = os.pipe()
+    reader, writer = os.fdopen(r, 'r'), os.fdopen(w, 'w')
+    printer = LogPrinter(containers, output=writer)
+    printer.run()
+    writer.close()
+    return reader.read()
+
+
+class MockContainer(object):
+    def __init__(self, reader):
+        self._reader = reader
+
+    @property
+    def name(self):
+        return 'myapp_web_1'
+
+    @property
+    def name_without_project(self):
+        return 'web_1'
+
+    def attach(self, *args, **kwargs):
+        return self._reader()
+
+    def wait(self, *args, **kwargs):
+        return 0