Skip to main content

VROP Conformance Test Specification

Version: 1.0
Date: 2025-01-18
Status: Draft

1. Introduction​

This document specifies the conformance test suite for the VR Overlay Protocol (VROP). Implementations must pass all required tests to claim VROP compliance.

2. Test Categories​

2.1 Protocol Conformance​

Tests that verify correct implementation of the VROP message protocol.

2.2 Performance Conformance​

Tests that verify implementations meet required performance metrics.

2.3 Security Conformance​

Tests that verify proper security boundary enforcement.

2.4 Interoperability Conformance​

Tests that verify compatibility between different implementations.

3. Test Environment Requirements​

3.1 Hardware Requirements​

  • CPU: 4+ cores, 3.0GHz or higher
  • RAM: 16GB minimum
  • GPU: VR-capable (GTX 1070 or equivalent)
  • Network: Gigabit Ethernet for network transport tests

3.2 Software Requirements​

  • Operating Systems: Windows 10+, Ubuntu 20.04+, macOS 12+
  • VR Runtimes: OpenVR 1.16+, OpenXR 1.0+
  • Test Framework: VROP Conformance Test Suite v1.0

3.3 Test Data Sets​

  • Message corpus: 10,000+ real-world VROP messages
  • Performance baselines: Platform-specific timing data
  • Security test vectors: Known attack patterns

4. Protocol Conformance Tests​

4.1 Message Format Tests​

TEST-PROTO-001: Message Structure Validation​

Objective: Verify messages conform to VROP structure
Procedure:

  1. Send messages with valid structure
  2. Send messages with invalid fields
  3. Send messages with missing required fields Expected Result: Valid messages accepted, invalid rejected with appropriate errors

TEST-PROTO-002: Message Type Support​

Objective: Verify all required message types are supported
Test Matrix:

Message TypeRequiredTest Case
INITYesTEST-PROTO-002-01
SHUTDOWNYesTEST-PROTO-002-02
CREATE_OVERLAYYesTEST-PROTO-002-03
UPDATE_OVERLAYYesTEST-PROTO-002-04
DESTROY_OVERLAYYesTEST-PROTO-002-05
SUBMIT_FRAMEYesTEST-PROTO-002-06

TEST-PROTO-003: Message Encoding​

Objective: Verify message encoding compliance
Procedure:

  1. Encode test messages using negotiated serialization format
  2. Decode using implementation under test
  3. Compare decoded values with expected structures Pass Criteria: 100% accurate decoding of valid message data in supported formats

TEST-PROTO-004: Version Negotiation​

Objective: Verify protocol version negotiation
Test Cases:

  1. Same version: Direct connection
  2. Compatible versions: Negotiate common version
  3. Incompatible versions: Graceful failure

4.2 State Management Tests​

TEST-STATE-001: Session Lifecycle​

Objective: Verify proper session state transitions
State Diagram:

direction: down

start: Start {
  shape: circle
  style: {
    fill: "#6C757D"
    stroke: "#495057"
    stroke-width: 2
  }
}

end: End {
  shape: circle
  style: {
    fill: "#6C757D"
    stroke: "#495057"
    stroke-width: 2
  }
}

DISCONNECTED: Disconnected {
  style: {
    fill: "#6C757D"
    stroke: "#495057"
    stroke-width: 2
  }
}

CONNECTING: Connecting {
  style: {
    fill: "#F18F01"
    stroke: "#C47301"
    stroke-width: 2
  }
}

CONNECTED: Connected {
  style: {
    fill: "#2D6E3B"
    stroke: "#1F4D28"
    stroke-width: 2
  }
}

DISCONNECTING: Disconnecting {
  style: {
    fill: "#F18F01"
    stroke: "#C47301"
    stroke-width: 2
  }
}

FAILED: Failed {
  style: {
    fill: "#DC3545"
    stroke: "#B02A37"
    stroke-width: 2
  }
}

start -> DISCONNECTED: Initialize
DISCONNECTED -> CONNECTING: Connect
CONNECTING -> CONNECTED: Success
CONNECTING -> FAILED: Connection error
CONNECTED -> DISCONNECTING: Disconnect
CONNECTED -> FAILED: Connection lost
DISCONNECTING -> DISCONNECTED: Complete
FAILED -> DISCONNECTED: Retry
DISCONNECTED -> end: Terminate

TEST-STATE-002: Overlay Lifecycle​

Objective: Verify overlay state management
Test Sequence:

  1. Create overlay
  2. Update properties
  3. Submit frames
  4. Destroy overlay
  5. Verify cleanup

TEST-STATE-003: Error Recovery​

Objective: Verify graceful error handling
Error Scenarios:

  • Invalid message during session
  • Transport disconnection
  • Resource exhaustion
  • Permission denied

5. Performance Conformance Tests​

5.1 Latency Tests​

TEST-PERF-001: Message Latency​

Objective: Verify message processing within latency bounds
Requirements:

TransportMax LatencyMeasurement
Direct Call5μsFunction entry to exit
Shared Memory50μsWrite to read
Socket500μsSend to receive
Network50msSend to receive

Procedure:

  1. Send 10,000 messages
  2. Measure round-trip time
  3. Calculate percentiles Pass Criteria:
  • 95th percentile < specified maximum
  • 99th percentile < 2x maximum

TEST-PERF-002: Frame Timing​

Objective: Verify frame submission timing accuracy
Test Setup:

  • Target frame rates: 72Hz, 90Hz, 120Hz, 144Hz
  • Test duration: 60 seconds per frame rate Measurements:
  • Frame time variance
  • Missed frame count
  • Prediction accuracy Pass Criteria:
  • Frame variance < 1ms
  • Missed frames < 0.1%
  • Prediction error < 0.5ms

5.2 Throughput Tests​

TEST-PERF-003: Message Throughput​

Objective: Verify message processing rate
Requirement: 10,000 messages/second minimum
Procedure:

  1. Send messages at increasing rates
  2. Measure successful delivery rate
  3. Identify maximum sustainable rate Pass Criteria: Sustain 10,000 msg/s for 60 seconds

TEST-PERF-004: Concurrent Overlays​

Objective: Verify multi-overlay performance
Test Cases:

Overlay CountFrame RatePass Criteria
1144HzFull rate maintained
4144HzFull rate maintained
8144Hz> 90% rate maintained
16144Hz> 75% rate maintained

5.3 Resource Tests​

TEST-PERF-005: Memory Usage​

Objective: Verify memory consumption limits
Test Scenarios:

  1. Base memory usage (no overlays)
  2. Memory per overlay
  3. Memory under stress Pass Criteria:
  • Base usage < 50MB
  • Per overlay < 10MB overhead
  • No memory leaks over 1 hour

TEST-PERF-006: CPU Usage​

Objective: Verify CPU overhead
Measurements:

  • Protocol processing overhead
  • Idle CPU usage
  • Peak CPU usage Pass Criteria:
  • Protocol overhead < 1% per 1000 msg/s
  • Idle usage < 0.1%
  • Peak usage < 10%

6. Security Conformance Tests​

6.1 Capability Tests​

TEST-SEC-001: Capability Enforcement​

Objective: Verify capability-based permissions
Test Matrix:

CapabilityGrantedActionExpected
CREATE_OVERLAYNoCreateDenied
CREATE_OVERLAYYesCreateAllowed
GPU_DIRECTNoDirect submitDenied
GPU_DIRECTYesDirect submitAllowed

TEST-SEC-002: Capability Escalation Prevention​

Objective: Verify capabilities cannot be escalated
Attack Vectors:

  1. Request additional capabilities after init
  2. Forge capability messages
  3. Exploit race conditions Pass Criteria: All escalation attempts fail

6.2 Isolation Tests​

TEST-SEC-003: Process Isolation​

Objective: Verify overlay process isolation
Test Cases:

  1. Memory access across overlays
  2. File system access restrictions
  3. Network access control Pass Criteria: All cross-boundary access denied

TEST-SEC-004: Resource Quotas​

Objective: Verify resource limit enforcement
Limits to Test:

  • Memory allocation
  • GPU memory usage
  • Message rate limiting
  • Overlay count limits Pass Criteria: Limits enforced within 5% tolerance

6.3 Input Validation​

TEST-SEC-005: Message Validation​

Objective: Verify malformed message handling
Malformation Types:

  • Buffer overflows
  • Integer overflows
  • Invalid UTF-8
  • Circular references Pass Criteria: All malformed messages rejected safely

TEST-SEC-006: Injection Prevention​

Objective: Verify injection attack prevention
Attack Types:

  • Command injection
  • Path traversal
  • Script injection Pass Criteria: All injection attempts neutralized

7. Interoperability Tests​

7.1 Cross-Implementation Tests​

TEST-INTEROP-001: Basic Communication​

Objective: Verify communication between implementations
Test Matrix: All implementation pairs Test Sequence:

  1. Establish session
  2. Create overlay
  3. Submit frames
  4. Destroy overlay Pass Criteria: All operations succeed

TEST-INTEROP-002: Transport Negotiation​

Objective: Verify transport selection compatibility
Scenarios:

  • Both support same transport: Use optimal
  • Different transport support: Use common
  • No common transport: Graceful failure

7.2 Version Compatibility​

TEST-INTEROP-003: Version Interoperability​

Objective: Verify version compatibility handling
Test Matrix:

Client VersionServer VersionExpected Result
1.01.0Full compatibility
1.01.1Forward compatible
1.11.0Backward compatible
1.02.0Negotiation required

7.3 Platform Compatibility​

TEST-INTEROP-004: Cross-Platform Operation​

Objective: Verify cross-platform compatibility
Platform Matrix:

  • Windows ↔ Linux
  • Windows ↔ macOS
  • Linux ↔ macOS Pass Criteria: All platform pairs communicate successfully

8. Stress Tests​

8.1 Load Tests​

TEST-STRESS-001: Message Flooding​

Objective: Verify behavior under high message load
Procedure:

  1. Send messages at 10x normal rate
  2. Monitor system stability
  3. Verify graceful degradation Pass Criteria: No crashes, controlled degradation

TEST-STRESS-002: Rapid Overlay Creation​

Objective: Verify handling of rapid overlay lifecycle
Procedure:

  1. Create/destroy overlays rapidly
  2. Monitor resource usage
  3. Verify cleanup Pass Criteria: Stable operation, no resource leaks

8.2 Endurance Tests​

TEST-STRESS-003: Long Duration Operation​

Objective: Verify stability over extended time
Duration: 24 hours continuous operation Monitors:

  • Memory usage trend
  • Performance degradation
  • Error rate Pass Criteria:
  • Memory stable (±10%)
  • Performance stable (±5%)
  • Error rate < 0.01%

9. Conformance Levels​

9.1 Basic Conformance​

Requirements:

  • Pass all TEST-PROTO-* tests
  • Pass TEST-PERF-001 through TEST-PERF-004
  • Pass TEST-SEC-001, TEST-SEC-003, TEST-SEC-005
  • Pass TEST-INTEROP-001

9.2 Full Conformance​

Requirements:

  • Pass all tests in sections 4-7
  • Pass at least one stress test

9.3 Certified Conformance​

Requirements:

  • Pass all tests including stress tests
  • Third-party validation
  • Continuous integration testing

10. Test Execution​

10.1 Test Harness​

# Run all tests
vrop-test --all

# Run specific category
vrop-test --category protocol
vrop-test --category performance
vrop-test --category security

# Run specific test
vrop-test --test TEST-PROTO-001

# Generate report
vrop-test --all --report conformance-report.html

10.2 Result Reporting​

Test results must include:

  • Test ID and description
  • Pass/Fail status
  • Performance metrics (where applicable)
  • Error details (for failures)
  • Environment information
  • Timestamp and duration

10.3 Certification Process​

  1. Run full test suite
  2. Generate signed report
  3. Submit to certification body
  4. Schedule interoperability testing
  5. Receive certification decision

11. Test Implementation Notes​

11.1 Reference Implementation​

The conformance test suite includes a reference implementation that:

  • Implements minimal VROP functionality
  • Serves as test target
  • Provides canonical behavior

11.2 Test Isolation​

Each test must:

  • Run independently
  • Clean up all resources
  • Not affect other tests
  • Be deterministic

11.3 Platform-Specific Considerations​

  • Windows: Test Windows Defender interactions
  • Linux: Test with SELinux/AppArmor enabled
  • macOS: Test with System Integrity Protection

Appendix A: Test Message Corpus​

[Sample messages for each message type with valid and invalid variants]

Appendix B: Performance Baselines​

[Platform-specific performance expectations and measurement methodology]

Appendix C: Security Test Vectors​

[Specific attack patterns and expected defensive responses]