Module rsyscall.tests.test_seek
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from rsyscall.tests.trio_test_case import TrioTestCase
from rsyscall.sys.stat import Stat
from rsyscall import local_thread
class TestSeek(TrioTestCase):
async def asyncSetUp(self) -> None:
self.thr = local_thread
self.file = await self.thr.task.memfd_create(await self.thr.ptr("file"))
async def asyncTearDown(self) -> None:
await self.file.close()
async def test_preadwrite(self) -> None:
stat = await (await self.file.fstat(await self.thr.malloc(Stat))).read()
self.assertEqual(stat.size, 0)
read, _ = await self.file.pread(await self.thr.malloc(bytes, 16), offset=0)
self.assertEqual(read.size(), 0)
read, _ = await self.file.pread(await self.thr.malloc(bytes, 16), offset=1)
self.assertEqual(read.size(), 0)
# we can write to an offset past the end
data = b'abc'
wrote, _ = await self.file.pwrite(await self.thr.ptr(data), offset=1)
self.assertEqual(wrote.size(), len(data))
# the data is written fine
read, _ = await self.file.pread(await self.thr.malloc(bytes, 16), offset=1)
self.assertEqual(await read.read(), data)
# the earlier bytes are now zeros
read, _ = await self.file.pread(await self.thr.malloc(bytes, 16), offset=0)
self.assertEqual(await read.read(), b'\0' + data)
# size is now 4
stat = await (await self.file.fstat(await self.thr.malloc(Stat))).read()
self.assertEqual(stat.size, 4)Classes
class TestSeek (methodName='runTest')-
A trio-enabled variant of unittest.TestCase
Create an instance of the class that will use the named test method when executed. Raises a ValueError if the instance does not have a method with the specified name.
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class TestSeek(TrioTestCase): async def asyncSetUp(self) -> None: self.thr = local_thread self.file = await self.thr.task.memfd_create(await self.thr.ptr("file")) async def asyncTearDown(self) -> None: await self.file.close() async def test_preadwrite(self) -> None: stat = await (await self.file.fstat(await self.thr.malloc(Stat))).read() self.assertEqual(stat.size, 0) read, _ = await self.file.pread(await self.thr.malloc(bytes, 16), offset=0) self.assertEqual(read.size(), 0) read, _ = await self.file.pread(await self.thr.malloc(bytes, 16), offset=1) self.assertEqual(read.size(), 0) # we can write to an offset past the end data = b'abc' wrote, _ = await self.file.pwrite(await self.thr.ptr(data), offset=1) self.assertEqual(wrote.size(), len(data)) # the data is written fine read, _ = await self.file.pread(await self.thr.malloc(bytes, 16), offset=1) self.assertEqual(await read.read(), data) # the earlier bytes are now zeros read, _ = await self.file.pread(await self.thr.malloc(bytes, 16), offset=0) self.assertEqual(await read.read(), b'\0' + data) # size is now 4 stat = await (await self.file.fstat(await self.thr.malloc(Stat))).read() self.assertEqual(stat.size, 4)Ancestors
- TrioTestCase
- unittest.case.TestCase
Class variables
var nursery : trio.Nursery
Methods
async def test_preadwrite(self) ‑> NoneType-
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async def test_preadwrite(self) -> None: stat = await (await self.file.fstat(await self.thr.malloc(Stat))).read() self.assertEqual(stat.size, 0) read, _ = await self.file.pread(await self.thr.malloc(bytes, 16), offset=0) self.assertEqual(read.size(), 0) read, _ = await self.file.pread(await self.thr.malloc(bytes, 16), offset=1) self.assertEqual(read.size(), 0) # we can write to an offset past the end data = b'abc' wrote, _ = await self.file.pwrite(await self.thr.ptr(data), offset=1) self.assertEqual(wrote.size(), len(data)) # the data is written fine read, _ = await self.file.pread(await self.thr.malloc(bytes, 16), offset=1) self.assertEqual(await read.read(), data) # the earlier bytes are now zeros read, _ = await self.file.pread(await self.thr.malloc(bytes, 16), offset=0) self.assertEqual(await read.read(), b'\0' + data) # size is now 4 stat = await (await self.file.fstat(await self.thr.malloc(Stat))).read() self.assertEqual(stat.size, 4)
Inherited members