improve test coverage

Author: blueyed

Diff for: tests/test_add_options.py

@@ -363,7 +363,7 @@ def test_disabled_logger_in_sink(sink_with_logger):
 
 def test_invalid_function_kwargs():
     def function(message, a="Y"):
-        pass
+        raise NotImplementedError
 
     logger.add(function, b="X", catch=False)
     with pytest.raises(TypeError):
@@ -384,7 +384,7 @@ def __init__(self):
             self.out = ""
 
         def write(self, m):
-            pass
+            raise NotImplementedError
 
     writer = Writer()
     logger.add(writer, format="{message}", kw1="1", kw2="2", catch=False)

Diff for: tests/test_threading.py

@@ -11,8 +11,7 @@ def __init__(self, sleep_time):
         self.stopped = False
 
     def write(self, message):
-        if self.stopped:
-            raise RuntimeError("Can't write on stopped sink")
+        assert not self.stopped
 
         length = len(message)
         self.written += message[:length]

Diff for: tox.ini

@@ -3,4 +3,6 @@ source = .
 
 [coverage:report]
 include = loguru/*, tests/*
-
+exclude_lines =
+    \#\s*pragma: no cover
+    ^\s*raise NotImplementedError\b