tests: convert to pytest idioms

.coveragerc

@@ -12,3 +12,9 @@ source =
 [report]
 show_missing = true
 precision = 2
+exclude_also =
+    def __repr__
+
+    if 0:
+
+    raise NotImplementedError

.github/workflows/ci-tests.yml

@@ -15,7 +15,6 @@ jobs:
         strategy:
             matrix:
                 py:
-                    - "3.7"
                     - "3.8"
                     - "3.9"
                     - "3.10"

pyproject.toml

@@ -31,4 +31,5 @@ force_sort_within_sections = true
 no_lines_before = "THIRDPARTY"
 sections = "FUTURE,THIRDPARTY,FIRSTPARTY,LOCALFOLDER"
 default_section = "THIRDPARTY"
-known_first_party = "colander"
+known_first_party = "colander,pytest,translationstring"
+force_single_line = true

src/colander/__init__.py

@@ -8,10 +8,11 @@
 import mimetypes
 import pprint
 import re
-import translationstring
 import types
 import warnings
 
+import translationstring
+
 _ = translationstring.TranslationStringFactory('colander')
 
 
@@ -199,7 +200,7 @@ def _keyname(self):
             return str(self.pos)
         return str(self.node.name)
 
-    def asdict(self, translate=None, separator='; '):
+    def asdict(self, translate=None, separator='; '):  # pragma NO COVER
         """Return a dict holding a basic error report for this exception.
 
         The values in the dict will **not** be language-translated by
@@ -231,7 +232,7 @@ def asdict(self, translate=None, separator='; '):
             errors['.'.join(keyparts)] = msgs
         return errors
 
-    def __str__(self):
+    def __str__(self):  # pragma NO COVER
         return pprint.pformat(self.asdict())
 
 

tests/relative.py

@@ -1,3 +1,7 @@
 # For the benefit of TestGlobalObject
 class ImportableClass:
     pass
+
+
+def importable_func():
+    pass