public void TestCreateAndUpdatePage()
{
using (var pageStore = CreateEmptyPageStore("TestCreateAndUpdatePage.dat"))
{
var newPage = pageStore.Create(1);
newPage = pageStore.GetWriteablePage(1, newPage);
newPage.SetData(_testBuffer1);
pageStore.Commit(1, null);
Assert.AreEqual(1ul, newPage.Id);
}
using (var fs = new FileStream("TestCreateAndUpdatePage.dat", FileMode.Open, FileAccess.Read))
{
Assert.AreEqual(8192L, fs.Length);
}
using (var pageStore = new BinaryFilePageStore(_pm, "TestCreateAndUpdatePage.dat", 4096, true, 1))
{
var page = pageStore.Retrieve(1ul, null);
Assert.IsFalse(pageStore.IsWriteable(page));
try
{
page.SetData(_testBuffer2);
Assert.Fail("Expected an InvalidOperationException when attempting to write to a non-writeable page");
}
catch (InvalidOperationException)
{
// Expected
}
page = pageStore.GetWriteablePage(2, page);
Assert.IsTrue(pageStore.IsWriteable(page));
Assert.AreEqual(0, _testBuffer1.Compare(page.Data));
page.SetData(_testBuffer2);
pageStore.Commit(2, null);
}
using (var pageStore = new BinaryFilePageStore(_pm, "TestCreateAndUpdatePage.dat", 4096, true, 2))
{
var page = pageStore.Retrieve(1ul, null);
Assert.AreEqual(0, _testBuffer2.Compare(page.Data));
}
}
public void TestStoreModifiedExceptionThrown()
{
ulong pageId;
IPage page;
byte[] buffer1 = new byte[] {1, 1, 1, 1};
byte[] buffer2 = new byte[] {2, 2, 2, 2};
using (
var pageStore = TestUtils.CreateEmptyPageStore("TestStoreModifiedExceptionThrown.data",
PersistenceType.Rewrite))
{
page = pageStore.Create(1);
pageId = page.Id;
page.SetData(buffer1, 0, 0, 4);
pageStore.Commit(1, null);
}
using (
var readStore = new BinaryFilePageStore(TestUtils.PersistenceManager,
"TestStoreModifiedExceptionThrown.data",
BPlusTreeStoreManager.PageSize, true, 1))
{
page = readStore.Retrieve(page.Id, null);
Assert.AreEqual(1, page.Data[0]);
using (
var writeStore = new BinaryFilePageStore(TestUtils.PersistenceManager,
"TestStoreModifiedExceptionThrown.data",
BPlusTreeStoreManager.PageSize, true, 1))
{
var writePage = writeStore.Retrieve(pageId, null);
Assert.IsFalse(writeStore.IsWriteable(writePage));
writePage = writeStore.GetWriteablePage(2, writePage);
writePage.SetData(buffer2, 0, 0, 4);
writeStore.Commit(2, null);
}
page = readStore.Retrieve(page.Id, null);
Assert.AreEqual(1, page.Data[0]);
using (
var writeStore = new BinaryFilePageStore(TestUtils.PersistenceManager,
"TestStoreModifiedExceptionThrown.data",
BPlusTreeStoreManager.PageSize, true, 2))
{
var writePage = writeStore.Retrieve(pageId, null);
writePage = writeStore.GetWriteablePage(3, writePage);
writePage.SetData(buffer2, 0, 0, 4);
writeStore.Commit(3, null);
}
page = readStore.Retrieve(1, null);
Assert.AreEqual(1, page.Data[0]);
// We should not reach this assert because the ReadWriteStoreModifiedException should get thrown
}
}