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-rw-r--r--Lib/test/test_memoryio.py405
1 files changed, 405 insertions, 0 deletions
diff --git a/Lib/test/test_memoryio.py b/Lib/test/test_memoryio.py
new file mode 100644
index 0000000..0b09ca4
--- /dev/null
+++ b/Lib/test/test_memoryio.py
@@ -0,0 +1,405 @@
+"""Unit tests for memory-based file-like objects.
+StringIO -- for unicode strings
+BytesIO -- for bytes
+"""
+
+import unittest
+from test import test_support
+
+import io
+
+try:
+ import _bytesio
+ has_c_implementation = True
+except ImportError:
+ has_c_implementation = False
+
+
+class MemoryTestMixin:
+
+ def write_ops(self, f, t):
+ self.assertEqual(f.write(t("blah.")), 5)
+ self.assertEqual(f.seek(0), 0)
+ self.assertEqual(f.write(t("Hello.")), 6)
+ self.assertEqual(f.tell(), 6)
+ self.assertEqual(f.seek(5), 5)
+ self.assertEqual(f.tell(), 5)
+ self.assertEqual(f.write(t(" world\n\n\n")), 9)
+ self.assertEqual(f.seek(0), 0)
+ self.assertEqual(f.write(t("h")), 1)
+ self.assertEqual(f.truncate(12), 12)
+ self.assertEqual(f.tell(), 12)
+
+ def test_write(self):
+ buf = self.buftype("hello world\n")
+ memio = self.ioclass(buf)
+
+ self.write_ops(memio, self.buftype)
+ self.assertEqual(memio.getvalue(), buf)
+ memio = self.ioclass()
+ self.write_ops(memio, self.buftype)
+ self.assertEqual(memio.getvalue(), buf)
+ self.assertRaises(TypeError, memio.write, None)
+ memio.close()
+ self.assertRaises(ValueError, memio.write, self.buftype(""))
+
+ def test_writelines(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass()
+
+ self.assertEqual(memio.writelines([buf] * 100), None)
+ self.assertEqual(memio.getvalue(), buf * 100)
+ memio.writelines([])
+ self.assertEqual(memio.getvalue(), buf * 100)
+ memio = self.ioclass()
+ self.assertRaises(TypeError, memio.writelines, [buf] + [1])
+ self.assertEqual(memio.getvalue(), buf)
+ self.assertRaises(TypeError, memio.writelines, None)
+ memio.close()
+ self.assertRaises(ValueError, memio.writelines, [])
+
+ def test_writelines_error(self):
+ memio = self.ioclass()
+ def error_gen():
+ yield self.buftype('spam')
+ raise KeyboardInterrupt
+
+ self.assertRaises(KeyboardInterrupt, memio.writelines, error_gen())
+
+ def test_truncate(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ self.assertRaises(ValueError, memio.truncate, -1)
+ memio.seek(6)
+ self.assertEqual(memio.truncate(), 6)
+ self.assertEqual(memio.getvalue(), buf[:6])
+ self.assertEqual(memio.truncate(4), 4)
+ self.assertEqual(memio.getvalue(), buf[:4])
+ self.assertEqual(memio.tell(), 4)
+ memio.write(buf)
+ self.assertEqual(memio.getvalue(), buf[:4] + buf)
+ pos = memio.tell()
+ self.assertEqual(memio.truncate(None), pos)
+ self.assertEqual(memio.tell(), pos)
+ self.assertRaises(TypeError, memio.truncate, '0')
+ memio.close()
+ self.assertRaises(ValueError, memio.truncate, 0)
+
+ def test_init(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+ self.assertEqual(memio.getvalue(), buf)
+ memio = self.ioclass(None)
+ self.assertEqual(memio.getvalue(), self.EOF)
+ memio.__init__(buf * 2)
+ self.assertEqual(memio.getvalue(), buf * 2)
+ memio.__init__(buf)
+ self.assertEqual(memio.getvalue(), buf)
+
+ def test_read(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ self.assertEqual(memio.read(0), self.EOF)
+ self.assertEqual(memio.read(1), buf[:1])
+ self.assertEqual(memio.read(4), buf[1:5])
+ self.assertEqual(memio.read(900), buf[5:])
+ self.assertEqual(memio.read(), self.EOF)
+ memio.seek(0)
+ self.assertEqual(memio.read(), buf)
+ self.assertEqual(memio.read(), self.EOF)
+ self.assertEqual(memio.tell(), 10)
+ memio.seek(0)
+ self.assertEqual(memio.read(-1), buf)
+ memio.seek(0)
+ self.assertEqual(memio.read(None), buf)
+ self.assertRaises(TypeError, memio.read, '')
+ memio.close()
+ self.assertRaises(ValueError, memio.read)
+
+ def test_readline(self):
+ buf = self.buftype("1234567890\n")
+ memio = self.ioclass(buf * 2)
+
+ self.assertEqual(memio.readline(0), self.EOF)
+ self.assertEqual(memio.readline(), buf)
+ self.assertEqual(memio.readline(), buf)
+ self.assertEqual(memio.readline(), self.EOF)
+ memio.seek(0)
+ self.assertEqual(memio.readline(5), buf[:5])
+ self.assertEqual(memio.readline(5), buf[5:10])
+ self.assertEqual(memio.readline(5), buf[10:15])
+ memio.seek(0)
+ self.assertEqual(memio.readline(-1), buf)
+ memio.seek(0)
+ self.assertEqual(memio.readline(0), self.EOF)
+
+ buf = self.buftype("1234567890\n")
+ memio = self.ioclass((buf * 3)[:-1])
+ self.assertEqual(memio.readline(), buf)
+ self.assertEqual(memio.readline(), buf)
+ self.assertEqual(memio.readline(), buf[:-1])
+ self.assertEqual(memio.readline(), self.EOF)
+ memio.seek(0)
+ self.assertEqual(memio.readline(None), buf)
+ self.assertRaises(TypeError, memio.readline, '')
+ memio.close()
+ self.assertRaises(ValueError, memio.readline)
+
+ def test_readlines(self):
+ buf = self.buftype("1234567890\n")
+ memio = self.ioclass(buf * 10)
+
+ self.assertEqual(memio.readlines(), [buf] * 10)
+ memio.seek(5)
+ self.assertEqual(memio.readlines(), [buf[5:]] + [buf] * 9)
+ memio.seek(0)
+ self.assertEqual(memio.readlines(15), [buf] * 2)
+ memio.seek(0)
+ self.assertEqual(memio.readlines(-1), [buf] * 10)
+ memio.seek(0)
+ self.assertEqual(memio.readlines(0), [buf] * 10)
+ memio.seek(0)
+ self.assertEqual(memio.readlines(None), [buf] * 10)
+ self.assertRaises(TypeError, memio.readlines, '')
+ memio.close()
+ self.assertRaises(ValueError, memio.readlines)
+
+ def test_iterator(self):
+ buf = self.buftype("1234567890\n")
+ memio = self.ioclass(buf * 10)
+
+ self.assertEqual(iter(memio), memio)
+ self.failUnless(hasattr(memio, '__iter__'))
+ self.failUnless(hasattr(memio, '__next__'))
+ i = 0
+ for line in memio:
+ self.assertEqual(line, buf)
+ i += 1
+ self.assertEqual(i, 10)
+ memio.seek(0)
+ i = 0
+ for line in memio:
+ self.assertEqual(line, buf)
+ i += 1
+ self.assertEqual(i, 10)
+ memio = self.ioclass(buf * 2)
+ memio.close()
+ self.assertRaises(ValueError, memio.__next__)
+
+ def test_getvalue(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ self.assertEqual(memio.getvalue(), buf)
+ memio.read()
+ self.assertEqual(memio.getvalue(), buf)
+ memio = self.ioclass(buf * 1000)
+ self.assertEqual(memio.getvalue()[-3:], self.buftype("890"))
+ memio = self.ioclass(buf)
+ memio.close()
+ self.assertRaises(ValueError, memio.getvalue)
+
+ def test_seek(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ memio.read(5)
+ self.assertRaises(ValueError, memio.seek, -1)
+ self.assertRaises(ValueError, memio.seek, 1, -1)
+ self.assertRaises(ValueError, memio.seek, 1, 3)
+ self.assertEqual(memio.seek(0), 0)
+ self.assertEqual(memio.seek(0, 0), 0)
+ self.assertEqual(memio.read(), buf)
+ self.assertEqual(memio.seek(3), 3)
+ self.assertEqual(memio.seek(0, 1), 3)
+ self.assertEqual(memio.read(), buf[3:])
+ self.assertEqual(memio.seek(len(buf)), len(buf))
+ self.assertEqual(memio.read(), self.EOF)
+ memio.seek(len(buf) + 1)
+ self.assertEqual(memio.read(), self.EOF)
+ self.assertEqual(memio.seek(0, 2), len(buf))
+ self.assertEqual(memio.read(), self.EOF)
+ memio.close()
+ self.assertRaises(ValueError, memio.seek, 0)
+
+ def test_overseek(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ self.assertEqual(memio.seek(len(buf) + 1), 11)
+ self.assertEqual(memio.read(), self.EOF)
+ self.assertEqual(memio.tell(), 11)
+ self.assertEqual(memio.getvalue(), buf)
+ memio.write(self.EOF)
+ self.assertEqual(memio.getvalue(), buf)
+ memio.write(buf)
+ self.assertEqual(memio.getvalue(), buf + self.buftype('\0') + buf)
+
+ def test_tell(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ self.assertEqual(memio.tell(), 0)
+ memio.seek(5)
+ self.assertEqual(memio.tell(), 5)
+ memio.seek(10000)
+ self.assertEqual(memio.tell(), 10000)
+ memio.close()
+ self.assertRaises(ValueError, memio.tell)
+
+ def test_flush(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ self.assertEqual(memio.flush(), None)
+
+ def test_flags(self):
+ memio = self.ioclass()
+
+ self.assertEqual(memio.writable(), True)
+ self.assertEqual(memio.readable(), True)
+ self.assertEqual(memio.seekable(), True)
+ self.assertEqual(memio.isatty(), False)
+ self.assertEqual(memio.closed, False)
+ memio.close()
+ self.assertEqual(memio.writable(), True)
+ self.assertEqual(memio.readable(), True)
+ self.assertEqual(memio.seekable(), True)
+ self.assertRaises(ValueError, memio.isatty)
+ self.assertEqual(memio.closed, True)
+
+ def test_subclassing(self):
+ buf = self.buftype("1234567890")
+ def test1():
+ class MemIO(self.ioclass):
+ pass
+ m = MemIO(buf)
+ return m.getvalue()
+ def test2():
+ class MemIO(self.ioclass):
+ def __init__(me, a, b):
+ self.ioclass.__init__(me, a)
+ m = MemIO(buf, None)
+ return m.getvalue()
+ self.assertEqual(test1(), buf)
+ self.assertEqual(test2(), buf)
+
+
+class PyBytesIOTest(MemoryTestMixin, unittest.TestCase):
+ @staticmethod
+ def buftype(s):
+ return s.encode("ascii")
+ ioclass = io._BytesIO
+ EOF = b""
+
+ def test_read1(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ self.assertRaises(TypeError, memio.read1)
+ self.assertEqual(memio.read(), buf)
+
+ def test_readinto(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ b = bytearray(b"hello")
+ self.assertEqual(memio.readinto(b), 5)
+ self.assertEqual(b, b"12345")
+ self.assertEqual(memio.readinto(b), 5)
+ self.assertEqual(b, b"67890")
+ self.assertEqual(memio.readinto(b), 0)
+ self.assertEqual(b, b"67890")
+ b = bytearray(b"hello world")
+ memio.seek(0)
+ self.assertEqual(memio.readinto(b), 10)
+ self.assertEqual(b, b"1234567890d")
+ b = bytearray(b"")
+ memio.seek(0)
+ self.assertEqual(memio.readinto(b), 0)
+ self.assertEqual(b, b"")
+ self.assertRaises(TypeError, memio.readinto, '')
+ import array
+ a = array.array('b', b"hello world")
+ memio = self.ioclass(buf)
+ memio.readinto(a)
+ self.assertEqual(a.tostring(), b"1234567890d")
+ memio.close()
+ self.assertRaises(ValueError, memio.readinto, b)
+
+ def test_relative_seek(self):
+ buf = self.buftype("1234567890")
+ memio = self.ioclass(buf)
+
+ self.assertEqual(memio.seek(-1, 1), 0)
+ self.assertEqual(memio.seek(3, 1), 3)
+ self.assertEqual(memio.seek(-4, 1), 0)
+ self.assertEqual(memio.seek(-1, 2), 9)
+ self.assertEqual(memio.seek(1, 1), 10)
+ self.assertEqual(memio.seek(1, 2), 11)
+ memio.seek(-3, 2)
+ self.assertEqual(memio.read(), buf[-3:])
+ memio.seek(0)
+ memio.seek(1, 1)
+ self.assertEqual(memio.read(), buf[1:])
+
+ def test_unicode(self):
+ memio = self.ioclass()
+
+ self.assertRaises(TypeError, self.ioclass, "1234567890")
+ self.assertRaises(TypeError, memio.write, "1234567890")
+ self.assertRaises(TypeError, memio.writelines, ["1234567890"])
+
+ def test_bytes_array(self):
+ buf = b"1234567890"
+ import array
+ a = array.array('b', list(buf))
+ memio = self.ioclass(a)
+ self.assertEqual(memio.getvalue(), buf)
+ self.assertEqual(memio.write(a), 10)
+ self.assertEqual(memio.getvalue(), buf)
+
+
+class PyStringIOTest(MemoryTestMixin, unittest.TestCase):
+ buftype = str
+ ioclass = io.StringIO
+ EOF = ""
+
+ def test_relative_seek(self):
+ memio = self.ioclass()
+
+ self.assertRaises(IOError, memio.seek, -1, 1)
+ self.assertRaises(IOError, memio.seek, 3, 1)
+ self.assertRaises(IOError, memio.seek, -3, 1)
+ self.assertRaises(IOError, memio.seek, -1, 2)
+ self.assertRaises(IOError, memio.seek, 1, 1)
+ self.assertRaises(IOError, memio.seek, 1, 2)
+
+ # XXX: For the Python version of io.StringIO, this is highly
+ # dependent on the encoding used for the underlying buffer.
+ # def test_widechar(self):
+ # buf = self.buftype("\U0002030a\U00020347")
+ # memio = self.ioclass(buf)
+ #
+ # self.assertEqual(memio.getvalue(), buf)
+ # self.assertEqual(memio.write(buf), len(buf))
+ # self.assertEqual(memio.tell(), len(buf))
+ # self.assertEqual(memio.getvalue(), buf)
+ # self.assertEqual(memio.write(buf), len(buf))
+ # self.assertEqual(memio.tell(), len(buf) * 2)
+ # self.assertEqual(memio.getvalue(), buf + buf)
+
+if has_c_implementation:
+ class CBytesIOTest(PyBytesIOTest):
+ ioclass = io.BytesIO
+
+def test_main():
+ tests = [PyBytesIOTest, PyStringIOTest]
+ if has_c_implementation:
+ tests.extend([CBytesIOTest])
+ test_support.run_unittest(*tests)
+
+if __name__ == '__main__':
+ test_main()
generated by cgit v0.12 at 2024-11-28 16:46:43 (GMT)