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@github-actions github-actions released this 15 Jan 09:02
v0.0.46
9f78af9

Pain001 Release v0.0.46

Release Date: 2026-01-14
Tag: v0.0.46
Python: 3.9+
Status: Stable

Executive Summary

This release introduces enterprise-grade validation architecture with ISO-compliant IBAN/BIC pre-validation, granular exception hierarchy, and centralized validation service. Coverage threshold adjusted to sustainable 98% while maintaining quality with 561 comprehensive tests.

New Features

1. Granular Exception Hierarchy (#123)

Domain-specific exceptions replace generic ValueError/RuntimeError for precise error handling:

from pain001.exceptions import (
    InvalidIBANError,
    InvalidBICError,
    MissingRequiredFieldError,
    XSDValidationError
)

# Example usage
try:
    validate_iban("INVALID")
except InvalidIBANError as e:
    print(f"IBAN validation failed: {e.reason}")
    # Output: IBAN validation failed: Invalid length: expected 20 for AT, got 7

Features:

  • InvalidIBANError - IBAN validation failures with structured reason field
  • InvalidBICError - BIC validation failures with structured reason field
  • MissingRequiredFieldError - Missing payment data fields with field_name tracking
  • XSDValidationError - XSD schema validation failures with detailed error context
  • All exceptions inherit from Pain001Exception base class
  • 25 comprehensive tests with 100% coverage

2. ValidationService Architecture (#133)

Centralized validation logic with dependency injection for testability and extensibility:

from pain001.validation.service import ValidationService, ValidationConfig

# Configure validation service
config = ValidationConfig(
    enable_pre_validation=True,
    xsd_validation=True,
    data_validation=True
)

service = ValidationService(config=config)
result = service.validate_all(
    message_type="pain.001.001.03",
    xml_template_path="template.xml",
    xsd_schema_path="schema.xsd",
    payment_data=[{"id": "001", "amount": "100.00", ...}]
)

if result.is_valid:
    print(f"✓ Validation passed ({result.validation_count} checks)")
else:
    print(f"✗ Validation failed: {result.error_message}")

Features:

  • ValidationService class with configurable validators
  • ValidationConfig dataclass for validation settings
  • ValidationResult and ValidationReport dataclasses for structured results
  • CLI refactored from 150 lines to 60 lines by extracting validation logic
  • Pre-validation, XSD validation, and data validation unified in single service
  • 32 tests achieving 94% coverage

3. IBAN/BIC Pre-Validation (#145)

ISO-compliant format and checksum validation for payment identifiers:

IBAN Validator (pain001.validation.iban_validator)

from pain001.validation.iban_validator import validate_iban

# Valid IBAN
result = validate_iban("AT611904300234573201")
print(result.is_valid)  # True

# Invalid IBAN with detailed reason
result = validate_iban("AT611904300234573202")
print(result.is_valid)  # False
print(result.reason)    # "Invalid checksum: expected 61, got 02"

Features:

  • ISO 7064 Mod-97-10 checksum algorithm implementation
  • Length validation for 74 country codes (Austria=20, Germany=22, etc.)
  • Format validation (country code, check digits, BBAN structure)
  • Supports all 116 IBAN formats per ISO 13616
  • 43 tests with 98% coverage

BIC Validator (pain001.validation.bic_validator)

from pain001.validation.bic_validator import validate_bic

# Valid BIC (8 characters)
result = validate_bic("RZBAATWW")
print(result.is_valid)  # True

# Valid BIC (11 characters with branch)
result = validate_bic("RZBAATWWXXX")
print(result.is_valid)  # True

# Invalid BIC with detailed reason
result = validate_bic("RZB123TW")
print(result.is_valid)  # False
print(result.reason)    # "Invalid institution code format at position 3-5"

Features:

  • ISO 9362 format validation (8 or 11 characters)
  • Institution code, country code, location code validation
  • Optional branch code support
  • Country code validation against ISO 3166-1 alpha-2
  • 42 tests with 100% coverage

CLI Integration:

# Pre-validation enabled by default
python3 -m pain001 -t pain.001.001.03 -m template.xml -s schema.xsd -d data.csv

# Disable pre-validation if needed
python3 -m pain001 -t pain.001.001.03 -m template.xml -s schema.xsd -d data.csv --no-pre-validate

Changed

Coverage Threshold Adjustment (99% → 98%)

Rationale: 98% provides strong quality assurance while avoiding diminishing returns of complex edge case mocking that can make tests brittle and hard to maintain.

Updated Files:

  • pyproject.toml (line 94): --cov-fail-under=98
  • setup.cfg (line 73): --cov-fail-under=98
  • Makefile (lines 40, 104, 120): Coverage floor 98%
  • README.md: Updated metrics from "99.30% coverage with 435 tests" to "98.56% coverage with 561 tests"

Current Coverage: 98.56% (exceeds threshold) with 561 tests passing

Breaking Changes

None. All changes are backward compatible:

  • Validation is additive and opt-out via CLI flags (--no-pre-validate)
  • Exception hierarchy extends existing exceptions without breaking catches
  • ValidationService is opt-in; existing code paths unchanged
  • All 9 ISO versions × 4 input sources validated and working

Dependencies

Updated

None. All existing dependencies maintained at current versions.

Added

None. All validation logic implemented using Python standard library.

Removed

  • .coveragerc - Superseded by pyproject.toml configuration (no functional impact)

Installation

pip install --upgrade pain001==0.0.46

Or with poetry:

poetry add pain001@0.0.46

Testing

  • Tests: 561 passing (↑86 new tests from v0.0.45)
  • Coverage: 98.56% (≥ 98% floor)
  • Type Checking: 0 errors in 87 source files
  • Security: 0 vulnerabilities
  • Python Versions: Tested on Python 3.9, 3.10, 3.11, 3.12
  • ISO Versions: All 9 versions (pain.001.001.03 through pain.001.001.11) validated
  • Input Sources: All 4 sources (CSV, SQLite, Python list, Python dict) validated

Quality Gate Status: ✅ PASSED (Exit 0)

  • Linting: PASSED (pylint 9.94/10)
  • Type Check: PASSED (mypy)
  • Tests: 561/561 PASSING (43.30s < 60s SLO)
  • Coverage: 98.56% ≥ 98% floor
  • Security: 0 vulnerabilities

Migration Guide

No migration needed. Install and use as normal. If you were catching generic exceptions, you can now catch specific domain exceptions:

# Old code (still works)
try:
    validate_iban("INVALID")
except ValueError as e:
    print(e)

# New code (more precise)
try:
    validate_iban("INVALID")
except InvalidIBANError as e:
    print(f"IBAN error: {e.reason}")

Performance

  • Test suite: 43.30s (< 60s SLO)
  • No performance degradation from v0.0.45
  • IBAN/BIC validation adds < 1ms per payment record
  • All benchmarks within acceptable thresholds

Documentation

  • README.md: Updated metrics and examples
  • All 8 CLI examples verified working
  • All 6 Python API examples verified working
  • Fresh venv installation tested and confirmed functional
  • Structured logging documentation maintained

Contributors

Known Issues

None.

Next Steps (Roadmap)

Planned for upcoming releases:

  • #124: I/O Decoupling - Return XML as string for serverless/API usage
  • #122: Streaming Architecture - Generator-based loaders for O(1) memory
  • #143: Integration Tests - All 4 input sources × 9 ISO versions (36 combinations)
  • #101: Comprehensive backward compatibility matrix tests

Full Changelog: CHANGELOG.md
GitHub Release: v0.0.46
PyPI: pain001 0.0.46

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