bpo-43651: PEP 597: Fix EncodingWarning in some tests (GH-25171)

* Fix test_float
* Fix _osx_support
* Fix test_fstring
* Fix test_gc
* Fix test_gzip
* Fix test_hashlib
* Fix unrelated whitespace issue

Co-authored-by: Ned Deily <nad@python.org>

1 files changed, 6 insertions, 6 deletions

diff --git a/Lib/test/test_gzip.py b/Lib/test/test_gzip.py
index 1dcfa2b..446b61a 100644
--- a/Lib/test/test_gzip.py
+++ b/Lib/test/test_gzip.py
@@ -660,14 +660,14 @@ class TestOpen(BaseTest):
     def test_text_modes(self):
         uncompressed = data1.decode("ascii") * 50
         uncompressed_raw = uncompressed.replace("\n", os.linesep)
-        with gzip.open(self.filename, "wt") as f:
+        with gzip.open(self.filename, "wt", encoding="ascii") as f:
             f.write(uncompressed)
         with open(self.filename, "rb") as f:
             file_data = gzip.decompress(f.read()).decode("ascii")
             self.assertEqual(file_data, uncompressed_raw)
-        with gzip.open(self.filename, "rt") as f:
+        with gzip.open(self.filename, "rt", encoding="ascii") as f:
             self.assertEqual(f.read(), uncompressed)
-        with gzip.open(self.filename, "at") as f:
+        with gzip.open(self.filename, "at", encoding="ascii") as f:
             f.write(uncompressed)
         with open(self.filename, "rb") as f:
             file_data = gzip.decompress(f.read()).decode("ascii")
@@ -681,7 +681,7 @@ class TestOpen(BaseTest):
             self.assertEqual(f.read(), uncompressed_bytes)
         with gzip.open(io.BytesIO(compressed), "rb") as f:
             self.assertEqual(f.read(), uncompressed_bytes)
-        with gzip.open(io.BytesIO(compressed), "rt") as f:
+        with gzip.open(io.BytesIO(compressed), "rt", encoding="ascii") as f:
             self.assertEqual(f.read(), uncompressed_str)
 
     def test_bad_params(self):
@@ -722,9 +722,9 @@ class TestOpen(BaseTest):
     def test_newline(self):
         # Test with explicit newline (universal newline mode disabled).
         uncompressed = data1.decode("ascii") * 50
-        with gzip.open(self.filename, "wt", newline="\n") as f:
+        with gzip.open(self.filename, "wt", encoding="ascii", newline="\n") as f:
             f.write(uncompressed)
-        with gzip.open(self.filename, "rt", newline="\r") as f:
+        with gzip.open(self.filename, "rt", encoding="ascii", newline="\r") as f:
             self.assertEqual(f.readlines(), [uncompressed])