Linux-Hello/tests/PHASE2_TEST_SUMMARY.md

Phase 2 Test Summary

Overview

This document summarizes the test suite for Phase 2 (Core Authentication) of the Linux Hello project.

Test Coverage

Unit Tests (Daemon - 9 tests)

Embedding Module (linux-hello-daemon/src/embedding.rs)

• ✅ test_placeholder_extractor - Tests embedding extraction with placeholder algorithm
• ✅ test_cosine_similarity - Tests cosine similarity calculation
• ✅ test_euclidean_distance - Tests Euclidean distance calculation

Matching Module (linux-hello-daemon/src/matching.rs)

• ✅ test_match_template - Tests template matching with threshold
• ✅ test_average_embeddings - Tests embedding averaging for enrollment

IR Emitter Module (linux-hello-daemon/src/camera/ir_emitter.rs)

• ✅ test_ir_emitter_creation - Tests IrEmitterControl creation
• ✅ test_ir_emitter_enable_disable - Tests enable/disable functionality
• ✅ test_scan_emitter_controls - Tests control scanning

Unit Tests (Common - 4 tests)

Config Module (linux-hello-common/src/config.rs)

• ✅ test_default_config - Tests default configuration values
• ✅ test_config_serialization - Tests TOML serialization/deserialization

Template Module (linux-hello-common/src/template.rs)

• ✅ test_template_store - Tests template storage operations

Error Module (linux-hello-common/src/error.rs)

• ✅ test_error_display - Tests error message formatting

Integration Tests

Phase 2 Auth Tests (tests/integration/phase2_auth_test.rs) - 12 tests

• ✅ test_template_store_operations - Template storage CRUD operations
• ✅ test_multiple_templates_per_user - Multiple template enrollment
• ✅ test_embedding_extraction - Embedding extractor with test images
• ✅ test_embedding_consistency - Same image produces same embedding
• ✅ test_cosine_similarity - Cosine similarity calculations
• ✅ test_template_matching - Template matching against stored templates
• ✅ test_embedding_averaging - Multi-frame embedding averaging
• ✅ test_empty_embeddings_error - Error handling for empty embeddings
• ✅ test_auth_service_init - Authentication service initialization
• ✅ test_match_result_structure - MatchResult structure validation
• ✅ test_embedding_diversity - Different images produce different embeddings
• ✅ test_template_serialization - JSON serialization roundtrip

IPC Tests (tests/integration/ipc_test.rs) - 9 tests

• ✅ test_authenticate_request_serialization - Auth request JSON format
• ✅ test_enroll_request_serialization - Enroll request JSON format
• ✅ test_list_request_serialization - List request JSON format
• ✅ test_remove_request_serialization - Remove request JSON format
• ✅ test_ping_request_serialization - Ping request JSON format
• ✅ test_response_serialization - Response JSON format with all fields
• ✅ test_error_response_serialization - Error response handling
• ✅ test_default_socket_path - Socket path constant
• ✅ test_pam_protocol_compatibility - PAM module JSON compatibility

Camera Tests (tests/camera_test.rs) - 4 tests

• ✅ test_camera_enumeration - V4L2 camera enumeration
• ✅ test_camera_open_and_capture - Camera frame capture
• ✅ test_ir_emitter_control - IR emitter control
• ✅ test_camera_info_properties - Camera info validation

Detection Tests (tests/detection_test.rs) - 6 tests

• ✅ test_simple_face_detection - Face detection with gradient image
• ✅ test_face_detection_empty_image - Edge case (empty image)
• ✅ test_face_detection_low_contrast - Low contrast image
• ✅ test_face_detection_high_contrast - High contrast image
• ✅ test_simple_face_detector_trait - Detector trait with thresholds
• ✅ test_face_detection_pixel_conversion - Pixel coordinate conversion

CLI Tests (tests/cli_test.rs) - 5 tests

• ✅ test_cli_status_command - Status command execution
• ✅ test_cli_config_command - Config TOML output
• ✅ test_cli_config_json_command - Config JSON output
• ✅ test_cli_capture_command - Capture command (requires camera)
• ✅ test_cli_detect_command - Detect command with test image

Test Summary

Category	Tests	Status
Unit Tests (Daemon)	9	✅ All Pass
Unit Tests (Common)	4	✅ All Pass
Phase 2 Auth Tests	12	✅ All Pass
IPC Tests	9	✅ All Pass
Camera Tests	4	✅ All Pass
Detection Tests	6	✅ All Pass
CLI Tests	5	✅ All Pass
Total	49	✅ All Pass

Phase 2 Features Tested

✅ Face Embedding

• Placeholder embedding extractor (128-dimensional vectors)
• Image statistics-based feature extraction
• Embedding normalization
• Consistent embeddings for identical images
• Different patterns produce distinguishable embeddings

✅ Template Matching

• Cosine similarity calculation
• Euclidean distance calculation
• Threshold-based matching
• Best match selection from multiple templates
• Distance-to-similarity conversion

✅ Template Storage

• JSON-based template storage
• Per-user directory structure
• Create, read, update, delete operations
• Multiple templates per user
• User enrollment status checking
• Template listing and enumeration

✅ IPC Protocol

• JSON message serialization/deserialization
• Authentication requests
• Enrollment requests
• List and remove operations
• PAM module compatibility
• Response format with confidence scores

✅ Authentication Service

• Service initialization
• Template store integration
• Camera capture (when available)
• Face detection and extraction
• Embedding extraction and matching

Running Tests

# Run all tests
cargo test --workspace

# Run only Phase 2 tests
cargo test --package linux-hello-tests --test phase2_auth_test
cargo test --package linux-hello-tests --test ipc_test

# Run with verbose output
cargo test --workspace -- --nocapture

Notes

1. Hardware Requirements: Camera tests may be skipped if no camera is available
2. Placeholder Implementation: Face detection and embedding use placeholder algorithms; ONNX integration planned for Phase 3
3. Permissions: Auth service init test may report errors on systems where /var/lib is not writable
4. PAM Integration: IPC protocol tests verify compatibility with the C PAM module

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Last Updated: January 2026