public void ShouldReturnTheCorrectElementWhenIndexed()
{
var t = new DynamicTable(4096);
t.Insert("a", 1, "b", 1);
t.Insert("c", 1, "d", 1);
t.Insert("e", 1, "f", 1);
t.Insert("ab", 2, "cd", 2);
Assert.Equal(new TableEntry {
Name = "ab", NameLen = 2, Value = "cd", ValueLen = 2
}, t.GetAt(0), ec);
Assert.Equal(new TableEntry {
Name = "e", NameLen = 1, Value = "f", ValueLen = 1
}, t.GetAt(1), ec);
Assert.Equal(new TableEntry {
Name = "c", NameLen = 1, Value = "d", ValueLen = 1
}, t.GetAt(2), ec);
Assert.Equal(new TableEntry {
Name = "a", NameLen = 1, Value = "b", ValueLen = 1
}, t.GetAt(3), ec);
t.Insert("xyz", 3, "fgh", 99);
Assert.Equal(new TableEntry {
Name = "xyz", NameLen = 3, Value = "fgh", ValueLen = 99
}, t.GetAt(0), ec);
}
public void DynamicTable_FirstEntry_IsMostRecentEntry()
{
DynamicTable dynamicTable = new DynamicTable(4096);
dynamicTable.Insert(_header1.Name, _header1.Value);
dynamicTable.Insert(_header2.Name, _header2.Value);
VerifyTableEntries(dynamicTable, _header2, _header1);
}
public void DynamicTable_Count_IsNumberOfEntriesInDynamicTable()
{
DynamicTable dynamicTable = new DynamicTable(4096);
dynamicTable.Insert(_header1.Name, _header1.Value);
Assert.Equal(1, dynamicTable.Count);
dynamicTable.Insert(_header2.Name, _header2.Value);
Assert.Equal(2, dynamicTable.Count);
}
public void DynamicTable_Size_IsCurrentDynamicTableSize()
{
DynamicTable dynamicTable = new DynamicTable(4096);
Assert.Equal(0, dynamicTable.Size);
dynamicTable.Insert(_header1.Name, _header1.Value);
Assert.Equal(_header1.Length, dynamicTable.Size);
dynamicTable.Insert(_header2.Name, _header2.Value);
Assert.Equal(_header1.Length + _header2.Length, dynamicTable.Size);
}
public void DynamicTable_ResizingToZeroEvictsAllEntries()
{
DynamicTable dynamicTable = new DynamicTable(4096);
dynamicTable.Insert(_header1.Name, _header1.Value);
dynamicTable.Insert(_header2.Name, _header2.Value);
dynamicTable.Resize(0);
Assert.Equal(0, dynamicTable.Count);
Assert.Equal(0, dynamicTable.Size);
}
public void DynamicTable_InsertEntryLargerThanRemainingSpace_NoOp()
{
DynamicTable dynamicTable = new DynamicTable(_header1.Length);
dynamicTable.Insert(_header1.Name, _header1.Value);
VerifyTableEntries(dynamicTable, _header1);
dynamicTable.Insert(_header2.Name, _header2.Value);
Assert.Equal(0, dynamicTable.Count);
Assert.Equal(0, dynamicTable.Size);
}
public void DynamicTable_ResizingEvictsOldestEntries()
{
DynamicTable dynamicTable = new DynamicTable(4096);
dynamicTable.Insert(_header1.Name, _header1.Value);
dynamicTable.Insert(_header2.Name, _header2.Value);
VerifyTableEntries(dynamicTable, _header2, _header1);
dynamicTable.Resize(_header2.Length);
VerifyTableEntries(dynamicTable, _header2);
}
public void ShouldReturnTrueIfAnItemCouldBeInserted()
{
var t = new DynamicTable(4096);
var res = t.Insert("a", 1, "b", 1);
Assert.True(res);
res = t.Insert("a", 1, "b", 1);
Assert.True(res);
res = t.Insert("a", 1, "b", 4096 - 2 * (1 + 1 + 32) - 32 - 1);
Assert.True(res);
}
public void WrapsAroundBuffer()
{
var header3 = new HeaderField(Encoding.ASCII.GetBytes("header-3"), Encoding.ASCII.GetBytes("value3"));
var header4 = new HeaderField(Encoding.ASCII.GetBytes("header-4"), Encoding.ASCII.GetBytes("value4"));
// Make the table small enough that the circular buffer kicks in.
var dynamicTable = new DynamicTable(HeaderField.RfcOverhead * 3);
dynamicTable.Insert(header4.Name, header4.Value);
dynamicTable.Insert(header3.Name, header3.Value);
dynamicTable.Insert(_header2.Name, _header2.Value);
dynamicTable.Insert(_header1.Name, _header1.Value);
VerifyTableEntries(dynamicTable, _header1, _header2);
}
public void GlobalSetup()
{
_dynamicTable = new DynamicTable(maxSize: 4096);
_dynamicTable.Insert(_headerNameBytes, _headerValueBytes);
_decoder = new HPackDecoder(maxDynamicTableSize: 4096, maxHeadersLength: 65536, _dynamicTable);
_testHeadersHandler = new TestHeadersHandler();
}
static bool InsertItemOfSize(DynamicTable table, string keyName, int size)
{
size -= 32;
var aSize = size / 2;
var bSize = size - aSize;
return(table.Insert(keyName, aSize, "", bSize));
}
private void ProcessValue()
{
OnString(nextState: State.Ready);
var headerNameSpan = new Span <byte>(_headerName, 0, _headerNameLength);
var headerValueSpan = new Span <byte>(_headerValueOctets, 0, _headerValueLength);
_dynamicTable.Insert(headerNameSpan, headerValueSpan);
}
public void DecodesIndexedHeaderField_DynamicTable()
{
// Add the header to the dynamic table
_dynamicTable.Insert(_headerNameBytes, _headerValueBytes);
// Index it
_decoder.Decode(new ReadOnlySequence <byte>(_indexedHeaderDynamic), endHeaders: true, handler: this);
Assert.Equal(_headerValueString, _decodedHeaders[_headerNameString]);
}
public void DynamicTable_InsertEntryLargerThanMaxSize_NoOp()
{
DynamicTable dynamicTable = new DynamicTable(_header1.Length - 1);
dynamicTable.Insert(_header1.Name, _header1.Value);
Assert.Equal(0, dynamicTable.Count);
Assert.Equal(0, dynamicTable.Size);
}
public void DynamicTable_CanBeResizedToLargerMaxSize()
{
DynamicTable dynamicTable = new DynamicTable(_header1.Length);
dynamicTable.Insert(_header1.Name, _header1.Value);
dynamicTable.Insert(_header2.Name, _header2.Value);
// _header2 is larger than _header1, so an attempt at inserting it
// would first clear the table then return without actually inserting it,
// given it is larger than the current max size.
Assert.Equal(0, dynamicTable.Count);
Assert.Equal(0, dynamicTable.Size);
dynamicTable.Resize(dynamicTable.MaxSize + _header2.Length);
dynamicTable.Insert(_header2.Name, _header2.Value);
VerifyTableEntries(dynamicTable, _header2);
}
public void NoOpWhenInsertingEntryLargerThanMaxSize()
{
var dynamicTable = new DynamicTable(_header1.Length - 1);
dynamicTable.Insert(_header1.Name, _header1.Value);
Assert.Equal(0, dynamicTable.Count);
Assert.Equal(0, dynamicTable.Size);
}
public void DecodesIndexedHeaderField_DynamicTable()
{
// Add the header to the dynamic table
_dynamicTable.Insert(_headerNameBytes, _headerValueBytes);
// Index it
_decoder.Decode(_indexedHeaderDynamic, endHeaders: true, onHeader: OnHeader, onHeaderState: null);
Assert.Equal(_headerValueString, _decodedHeaders[_headerNameString]);
}
public void BoundsCheck_ThrowsIndexOutOfRangeException()
{
DynamicTable dynamicTable = new DynamicTable(4096);
Assert.Throws <IndexOutOfRangeException>(() => dynamicTable[0]);
dynamicTable.Insert(_header1.Name, _header1.Value);
Assert.Throws <IndexOutOfRangeException>(() => dynamicTable[1]);
}
public void ShouldDrainTheTableIfAnElementCanNotBeInserted()
{
var t = new DynamicTable(4096);
var res = t.Insert("a", 2000, "b", 2000);
Assert.True(res);
Assert.Equal(1, t.Length);
Assert.Equal(4032, t.UsedSize);
res = t.Insert("a", 0, "b", 32);
Assert.True(res);
Assert.Equal(4096, t.UsedSize);
Assert.Equal(2, t.Length);
res = t.Insert("a", 3000, "b", 3000);
Assert.False(res);
Assert.Equal(t.UsedSize, 0);
Assert.Equal(0, t.Length);
}
public void ShouldReturnFalseIfAnItemCanNotBeInserted()
{
var t = new DynamicTable(4096);
var res = t.Insert("a", 5000, "b", 0);
Assert.False(res);
Assert.Equal(0, t.Length);
Assert.Equal(t.UsedSize, 0);
res = t.Insert("a", 0, "b", 5000);
Assert.False(res);
Assert.Equal(0, t.Length);
Assert.Equal(t.UsedSize, 0);
res = t.Insert("a", 3000, "b", 3000);
Assert.False(res);
Assert.Equal(t.UsedSize, 0);
Assert.Equal(0, t.Length);
}
public void ShouldIncreaseUsedSizeAndLengthIfItemIsInserted()
{
var t = new DynamicTable(4096);
t.Insert("a", 1, "b", 1);
var expectedSize = 1 + 1 + 32;
Assert.Equal(expectedSize, t.UsedSize);
Assert.Equal(1, t.Length);
t.Insert("xyz", 3, "abcd", 4);
expectedSize += 3 + 4 + 32;
Assert.Equal(expectedSize, t.UsedSize);
Assert.Equal(2, t.Length);
// Fill the table up
t.Insert("", 0, "a", 4096 - expectedSize - 32);
expectedSize = 4096;
Assert.Equal(expectedSize, t.UsedSize);
Assert.Equal(3, t.Length);
}
public void ShouldThrowAnErrorWhenInvalidlyIndexed()
{
var t = new DynamicTable(4096);
Assert.Throws <IndexOutOfRangeException>(() => t.GetAt(-1));
Assert.Throws <IndexOutOfRangeException>(() => t.GetAt(0));
Assert.Throws <IndexOutOfRangeException>(() => t.GetAt(1));
t.Insert("a", 0, "b", 0);
Assert.Throws <IndexOutOfRangeException>(() => t.GetAt(-1));
t.GetAt(0); // should not throw
Assert.Throws <IndexOutOfRangeException>(() => t.GetAt(1));
}
public void DynamicTable_WrapsRingBuffer_Success(int targetInsertIndex)
{
FieldInfo insertIndexField = typeof(DynamicTable).GetField("_insertIndex", BindingFlags.NonPublic | BindingFlags.Instance);
DynamicTable table = new DynamicTable(maxSize: 256);
Stack <byte[]> insertedHeaders = new Stack <byte[]>();
// Insert into dynamic table until its insert index into its ring buffer loops back to 0.
do
{
InsertOne();
}while ((int)insertIndexField.GetValue(table) != 0);
// Finally loop until the insert index reaches the target.
while ((int)insertIndexField.GetValue(table) != targetInsertIndex)
{
InsertOne();
}
void InsertOne()
{
byte[] data = Encoding.ASCII.GetBytes($"header-{insertedHeaders.Count}");
insertedHeaders.Push(data);
table.Insert(data, data);
}
// Now check to see that we can retrieve the remaining headers.
// Some headers will have been evacuated from the table during this process, so we don't exhaust the entire insertedHeaders stack.
Assert.True(table.Count > 0);
Assert.True(table.Count < insertedHeaders.Count);
for (int i = 0; i < table.Count; ++i)
{
HeaderField dynamicField = table[i];
byte[] expectedData = insertedHeaders.Pop();
Assert.True(expectedData.AsSpan().SequenceEqual(dynamicField.Name));
Assert.True(expectedData.AsSpan().SequenceEqual(dynamicField.Value));
}
}
public void DynamicTable_Resize_Success(int initialMaxSize, int finalMaxSize, int insertSize)
{
// This is purely to make it simple to perfectly reach our initial max size to test growing a full but non-wrapping buffer.
Debug.Assert((insertSize % 64) == 0, $"{nameof(insertSize)} must be a multiple of 64 ({nameof(HeaderField)}.{nameof(HeaderField.RfcOverhead)} * 2)");
DynamicTable dynamicTable = new DynamicTable(maxSize: initialMaxSize);
int insertedSize = 0;
while (insertedSize != insertSize)
{
byte[] data = Encoding.ASCII.GetBytes($"header-{dynamicTable.Size}".PadRight(16, ' '));
Debug.Assert(data.Length == 16);
dynamicTable.Insert(data, data);
insertedSize += data.Length * 2 + HeaderField.RfcOverhead;
}
List <HeaderField> headers = new List <HeaderField>();
for (int i = 0; i < dynamicTable.Count; ++i)
{
headers.Add(dynamicTable[i]);
}
dynamicTable.Resize(finalMaxSize);
int expectedCount = Math.Min(finalMaxSize / 64, headers.Count);
Assert.Equal(expectedCount, dynamicTable.Count);
for (int i = 0; i < dynamicTable.Count; ++i)
{
Assert.True(headers[i].Name.AsSpan().SequenceEqual(dynamicTable[i].Name));
Assert.True(headers[i].Value.AsSpan().SequenceEqual(dynamicTable[i].Value));
}
}
