diff options
Diffstat (limited to 'Lib/test/test_gzip.py')
| -rw-r--r-- | Lib/test/test_gzip.py | 124 |
1 files changed, 118 insertions, 6 deletions
diff --git a/Lib/test/test_gzip.py b/Lib/test/test_gzip.py index 5ae7467e66..270411bd80 100644 --- a/Lib/test/test_gzip.py +++ b/Lib/test/test_gzip.py @@ -33,7 +33,7 @@ class UnseekableIO(io.BytesIO): raise io.UnsupportedOperation -class TestGzip(unittest.TestCase): +class BaseTest(unittest.TestCase): filename = support.TESTFN def setUp(self): @@ -43,6 +43,7 @@ class TestGzip(unittest.TestCase): support.unlink(self.filename) +class TestGzip(BaseTest): def test_write(self): with gzip.GzipFile(self.filename, 'wb') as f: f.write(data1 * 50) @@ -64,6 +65,21 @@ class TestGzip(unittest.TestCase): d = f.read() self.assertEqual(d, data1*50) + def test_read1(self): + self.test_write() + blocks = [] + nread = 0 + with gzip.GzipFile(self.filename, 'r') as f: + while True: + d = f.read1() + if not d: + break + blocks.append(d) + nread += len(d) + # Check that position was updated correctly (see issue10791). + self.assertEqual(f.tell(), nread) + self.assertEqual(b''.join(blocks), data1 * 50) + def test_io_on_closed_object(self): # Test that I/O operations on closed GzipFile objects raise a # ValueError, just like the corresponding functions on file objects. @@ -100,14 +116,14 @@ class TestGzip(unittest.TestCase): # Bug #1074261 was triggered when reading a file that contained # many, many members. Create such a file and verify that reading it # works. - with gzip.open(self.filename, 'wb', 9) as f: + with gzip.GzipFile(self.filename, 'wb', 9) as f: f.write(b'a') for i in range(0, 200): - with gzip.open(self.filename, "ab", 9) as f: # append + with gzip.GzipFile(self.filename, "ab", 9) as f: # append f.write(b'a') # Try reading the file - with gzip.open(self.filename, "rb") as zgfile: + with gzip.GzipFile(self.filename, "rb") as zgfile: contents = b"" while 1: ztxt = zgfile.read(8192) @@ -124,7 +140,7 @@ class TestGzip(unittest.TestCase): with io.BufferedReader(f) as r: lines = [line for line in r] - self.assertEqual(lines, 50 * data1.splitlines(True)) + self.assertEqual(lines, 50 * data1.splitlines(keepends=True)) def test_readline(self): self.test_write() @@ -323,6 +339,14 @@ class TestGzip(unittest.TestCase): self.assertEqual(f.read(100), b'') self.assertEqual(nread, len(uncompressed)) + def test_textio_readlines(self): + # Issue #10791: TextIOWrapper.readlines() fails when wrapping GzipFile. + lines = (data1 * 50).decode("ascii").splitlines(keepends=True) + self.test_write() + with gzip.GzipFile(self.filename, 'r') as f: + with io.TextIOWrapper(f, encoding="ascii") as t: + self.assertEqual(t.readlines(), lines) + def test_fileobj_from_fdopen(self): # Issue #13781: Opening a GzipFile for writing fails when using a # fileobj created with os.fdopen(). @@ -351,8 +375,96 @@ class TestGzip(unittest.TestCase): datac = gzip.compress(data) self.assertEqual(gzip.decompress(datac), data) + +class TestOpen(BaseTest): + def test_binary_modes(self): + uncompressed = data1 * 50 + with gzip.open(self.filename, "wb") as f: + f.write(uncompressed) + with open(self.filename, "rb") as f: + file_data = gzip.decompress(f.read()) + self.assertEqual(file_data, uncompressed) + with gzip.open(self.filename, "rb") as f: + self.assertEqual(f.read(), uncompressed) + with gzip.open(self.filename, "ab") as f: + f.write(uncompressed) + with open(self.filename, "rb") as f: + file_data = gzip.decompress(f.read()) + self.assertEqual(file_data, uncompressed * 2) + + def test_implicit_binary_modes(self): + # Test implicit binary modes (no "b" or "t" in mode string). + uncompressed = data1 * 50 + with gzip.open(self.filename, "w") as f: + f.write(uncompressed) + with open(self.filename, "rb") as f: + file_data = gzip.decompress(f.read()) + self.assertEqual(file_data, uncompressed) + with gzip.open(self.filename, "r") as f: + self.assertEqual(f.read(), uncompressed) + with gzip.open(self.filename, "a") as f: + f.write(uncompressed) + with open(self.filename, "rb") as f: + file_data = gzip.decompress(f.read()) + self.assertEqual(file_data, uncompressed * 2) + + 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: + 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: + self.assertEqual(f.read(), uncompressed) + with gzip.open(self.filename, "at") 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 * 2) + + def test_bad_params(self): + # Test invalid parameter combinations. + with self.assertRaises(ValueError): + gzip.open(self.filename, "wbt") + with self.assertRaises(ValueError): + gzip.open(self.filename, "rb", encoding="utf-8") + with self.assertRaises(ValueError): + gzip.open(self.filename, "rb", errors="ignore") + with self.assertRaises(ValueError): + gzip.open(self.filename, "rb", newline="\n") + + def test_encoding(self): + # Test non-default encoding. + uncompressed = data1.decode("ascii") * 50 + uncompressed_raw = uncompressed.replace("\n", os.linesep) + with gzip.open(self.filename, "wt", encoding="utf-16") as f: + f.write(uncompressed) + with open(self.filename, "rb") as f: + file_data = gzip.decompress(f.read()).decode("utf-16") + self.assertEqual(file_data, uncompressed_raw) + with gzip.open(self.filename, "rt", encoding="utf-16") as f: + self.assertEqual(f.read(), uncompressed) + + def test_encoding_error_handler(self): + # Test with non-default encoding error handler. + with gzip.open(self.filename, "wb") as f: + f.write(b"foo\xffbar") + with gzip.open(self.filename, "rt", encoding="ascii", errors="ignore") \ + as f: + self.assertEqual(f.read(), "foobar") + + 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: + f.write(uncompressed) + with gzip.open(self.filename, "rt", newline="\r") as f: + self.assertEqual(f.readlines(), [uncompressed]) + def test_main(verbose=None): - support.run_unittest(TestGzip) + support.run_unittest(TestGzip, TestOpen) if __name__ == "__main__": test_main(verbose=True) |