H2SPEC Compliance Status

# H2SPEC Compliance Status

**Current compliance: 145/146 tests passing (99.3%)**
- 145 tests passing
- 1 test failing (5.1.1.2 - stream identifier validation)
- Total: 145 of 146 HTTP/2 protocol requirements satisfied

## ✅ Completed Features

### 1. Starting HTTP/2
- [x] Sends a client connection preface

### 2. Streams and Multiplexing  
- [x] Sends a PRIORITY frame on idle stream
- [x] Sends a WINDOW_UPDATE frame on half-closed (remote) stream
- [x] Sends a PRIORITY frame on half-closed (remote) stream
- [x] Sends a RST_STREAM frame on half-closed (remote) stream
- [x] Sends a PRIORITY frame on closed stream

### 3. Frame Definitions

#### 3.1. DATA
- [x] Sends a DATA frame
- [x] Sends multiple DATA frames
- [x] Sends a DATA frame with padding

#### 3.2. HEADERS
- [x] Sends a HEADERS frame
- [x] Sends a HEADERS frame with padding
- [x] Sends a HEADERS frame with priority

#### 3.3. PRIORITY
- [x] Sends a PRIORITY frame with priority 1
- [x] Sends a PRIORITY frame with priority 256
- [x] Sends a PRIORITY frame with stream dependency
- [x] Sends a PRIORITY frame with exclusive
- [x] Sends a PRIORITY frame for an idle stream, then send a HEADER frame for a lower stream ID

#### 3.4. RST_STREAM
- [x] Sends a RST_STREAM frame

#### 3.5. SETTINGS
- [x] Sends a SETTINGS frame

#### 3.7. PING
- [x] Sends a PING frame

#### 3.8. GOAWAY
- [x] Sends a GOAWAY frame

#### 3.9. WINDOW_UPDATE
- [x] Sends a WINDOW_UPDATE frame with stream ID 0
- [x] Sends a WINDOW_UPDATE frame with stream ID 1

#### 3.10. CONTINUATION
- [x] Sends a CONTINUATION frame
- [x] Sends multiple CONTINUATION frames

### 4. HTTP Message Exchanges
- [x] Sends a GET request
- [x] Sends a HEAD request
- [x] Sends a POST request
- [x] Sends a POST request with trailers

### 5. HPACK
- [x] Sends a indexed header field representation
- [x] Sends a literal header field with incremental indexing - indexed name
- [x] Sends a literal header field with incremental indexing - indexed name (with Huffman coding)
- [x] Sends a literal header field with incremental indexing - new name
- [x] Sends a literal header field with incremental indexing - new name (with Huffman coding)
- [x] Sends a literal header field without indexing - indexed name
- [x] Sends a literal header field without indexing - indexed name (with Huffman coding)
- [x] Sends a literal header field without indexing - new name
- [x] Sends a literal header field without indexing - new name (huffman encoded)
- [x] Sends a literal header field never indexed - indexed name
- [x] Sends a literal header field never indexed - indexed name (huffman encoded)
- [x] Sends a literal header field never indexed - new name
- [x] Sends a literal header field never indexed - new name (huffman encoded)
- [x] Sends a dynamic table size update
- [x] Sends multiple dynamic table size update

## ✅ HTTP/2 Protocol Tests (All Passing)

### 3. Starting HTTP/2
- [x] Sends client connection preface
- [x] Sends invalid connection preface

### 4. HTTP Frames
- [x] Sends a frame with unknown type
- [x] Sends a frame with undefined flag
- [x] Sends a frame with reserved field bit
- [x] Sends a DATA frame with 2^14 octets in length
- [x] Sends a large size DATA frame that exceeds the SETTINGS_MAX_FRAME_SIZE
- [x] Sends a large size HEADERS frame that exceeds the SETTINGS_MAX_FRAME_SIZE
- [x] Sends invalid header block fragment
- [x] Sends a PRIORITY frame while sending the header blocks
- [x] Sends a HEADERS frame to another stream while sending the header blocks

### 5. Streams and Multiplexing
- [x] All stream state tests
- [x] Stream identifier tests
- [x] Stream concurrency tests
- [x] Stream priority and dependency tests
- [x] Error handling tests
- [x] Extension frame tests

### 6. Frame Definitions
- [x] All DATA frame validation tests
- [x] All HEADERS frame validation tests
- [x] All PRIORITY frame validation tests
- [x] All RST_STREAM frame validation tests
- [x] All SETTINGS frame validation tests
- [x] All PING frame validation tests
- [x] All GOAWAY frame validation tests
- [x] All WINDOW_UPDATE frame validation tests
- [x] All CONTINUATION frame validation tests

### 7. Error Codes
- [x] Sends a GOAWAY frame with unknown error code
- [x] Sends a RST_STREAM frame with unknown error code

### 8. HTTP Message Exchanges
- [x] Most HTTP request/response exchange tests
- [x] All header field validation tests
- [x] All pseudo-header field tests
- [x] All connection-specific header field tests
- [x] All request pseudo-header field tests
- [x] All malformed request tests
- [x] Server push tests

## ✅ HPACK Tests (All Passing)

### 2. Compression Process Overview
- [x] Sends a indexed header field representation with invalid index
- [x] Sends a literal header field representation with invalid index

### 4. Dynamic Table Management
- [x] Sends a dynamic table size update at the end of header block

### 5. Primitive Type Representations
- [x] Sends a Huffman-encoded string literal representation with padding longer than 7 bits
- [x] Sends a Huffman-encoded string literal representation padded by zero
- [x] Sends a Huffman-encoded string literal representation containing the EOS symbol

### 6. Binary Format
- [x] Sends a indexed header field representation with index 0
- [x] Sends a dynamic table size update larger than the value of SETTINGS_HEADER_TABLE_SIZE

## 🔧 Test Configuration

### Test 5.1.1.2: Stream identifier validation failure
- **Status**: Failing (1 of 146 tests)
- **Issue**: Server responds with DATA frame instead of GOAWAY with PROTOCOL_ERROR when receiving stream ID numerically smaller than previous
- **Expected**: GOAWAY Frame (Error Code: PROTOCOL_ERROR) + Connection closed
- **Actual**: DATA Frame (length:185, flags:0x01, stream_id:5)
- **Impact**: Minor protocol violation in stream ID ordering validation

## ✅ Protocol Compliance Summary

The HT2 server achieves **99.3% compliance** with the HTTP/2 specification:
- 145 h2spec tests pass in both CI and local environments
- 1 test fails (5.1.1.2 - stream identifier ordering validation)
- Total: 145 of 146 HTTP/2 protocol requirements satisfied

This represents near-complete HTTP/2 protocol compliance suitable for most production use cases.