def testRead_MoreThanBuffer(self):
f = vfs.VfsFile(lambda _: iter([b'foo', b'bar']))
self.assertEqual(f.read(4), b'foob')
def testRead_AllWithSingleBuffer(self):
f = vfs.VfsFile(lambda _: iter([b'foo']))
self.assertEqual(f.read(), b'foo')
def testClose_DoesNotFailOnDoubleClose(self):
f = vfs.VfsFile(lambda _: iter([]))
f.close()
f.close()
def testIsatty(self):
f = vfs.VfsFile(lambda _: iter([]))
self.assertFalse(f.isatty())
def testReadinto1_LessThanBuffer(self):
f = vfs.VfsFile(lambda _: iter([b'foo', b'bar', b'quux']))
b = bytearray(2)
self.assertEqual(f.readinto1(b), 2)
self.assertEqual(b, b'fo')
def testReadinto1_ValueErrorOnFileClosed(self):
f = vfs.VfsFile(lambda _: iter([]))
f.close()
with self.assertRaises(ValueError):
f.readinto1(bytearray())
def testTruncate_UnsupportedOperation(self):
f = vfs.VfsFile(lambda _: iter([]))
with self.assertRaises(io.UnsupportedOperation):
f.truncate()
def testRead1_ReadCachedAndWholeNextBuffer(self):
f = vfs.VfsFile(lambda _: iter([b'foo', b'bar', b'quux']))
f.read(1)
self.assertEqual(f.read1(), b'oobar')
def testSeek_EndWhenceUnsupportedOperation(self):
f = vfs.VfsFile(lambda _: iter([]))
with self.assertRaises(io.UnsupportedOperation):
f.seek(0, whence=io.SEEK_END)
def testTell_ValueErrorOnFileClosed(self):
f = vfs.VfsFile(lambda _: iter([]))
f.close()
with self.assertRaises(ValueError):
f.tell()
def testSeek_CurWhence(self):
f = vfs.VfsFile(lambda _: iter([b'foobar']))
f.read(5)
self.assertEqual(f.seek(-2, whence=io.SEEK_CUR), 3)
self.assertEqual(f.read(), b'bar')
def testSeek_SetWhence(self):
f = vfs.VfsFile(lambda _: iter([b'foobar']))
f.read(5)
self.assertEqual(f.seek(2), 2)
self.assertEqual(f.read(), b'obar')
def testSeekable(self):
f = vfs.VfsFile(lambda _: iter([]))
self.assertTrue(f.seekable())
def testRead_AllWithMultipleBuffers(self):
f = vfs.VfsFile(lambda _: iter([b'foo', b'bar']))
self.assertEqual(f.read(), b'foobar')
def testWritable(self):
f = vfs.VfsFile(lambda _: iter([]))
self.assertFalse(f.writable())
def testRead1_MoreThanBuffer(self):
f = vfs.VfsFile(lambda _: iter([b'foo', b'bar', b'quux']))
self.assertEqual(f.read1(5), b'foo')
def testWritelines_UnsupportedOperation(self):
f = vfs.VfsFile(lambda _: iter([]))
with self.assertRaises(io.UnsupportedOperation):
f.writelines([b'foo'])
def testRead1_EmptyOnEof(self):
f = vfs.VfsFile(lambda _: iter([b'foo']))
self.assertEqual(f.read1(), b'foo')
self.assertEqual(f.read1(), b'')
self.assertEqual(f.read1(), b'')
def testDetach_UnsupportedOperation(self):
f = vfs.VfsFile(lambda _: iter([]))
with self.assertRaises(io.UnsupportedOperation):
f.detach()
def testReadinto1_MoreThanBuffer(self):
f = vfs.VfsFile(lambda _: iter([b'foo', b'bar', b'quux']))
b = bytearray(5)
self.assertEqual(f.readinto1(b), 3)
self.assertEqual(b[:3], b'foo')
def testReadable(self):
f = vfs.VfsFile(lambda _: iter([]))
self.assertTrue(f.readable())
def testClosed_AfterClose(self):
f = vfs.VfsFile(lambda _: iter([]))
self.assertFalse(f.closed)
f.close()
self.assertTrue(f.closed)
def testRead_LessThanBuffer(self):
f = vfs.VfsFile(lambda _: iter([b'foo']))
self.assertEqual(f.read(2), b'fo')
def testFileno_UnsupportedOperation(self):
f = vfs.VfsFile(lambda _: iter([]))
with self.assertRaises(io.UnsupportedOperation):
f.fileno()
def testFlush_DoesNotFail(self):
f = vfs.VfsFile(lambda _: iter([]))
f.flush()