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Testing Radio State Transitions and Station Management in python-patterns

This test suite validates the functionality of a Radio state implementation, focusing on state transitions and station management in a simulated radio system. The tests verify proper initialization, state switching between AM/FM modes, and station selection behavior.

Test Coverage Overview

The test suite provides comprehensive coverage of the Radio state machine implementation.

Key areas tested include:

Initial state verification for AM mode
Default station settings validation
State transitions between AM and FM modes
Station position management

Integration points focus on the interaction between Radio class and its internal state management system.

Implementation Analysis

The testing approach employs pytest fixtures to establish consistent test environments and state management. The implementation follows the State pattern, with distinct test cases for each state transition and property verification.

Technical patterns include:

Fixture-based test setup
State transition validation
Property-based testing for station values
Atomic test cases for individual features

Technical Details

Testing infrastructure includes:

pytest as the primary testing framework
Fixture-based test setup for Radio instance
State pattern implementation validation
Assertion-based verification methods

Best Practices Demonstrated

The test suite exemplifies strong testing practices through focused, isolated test cases and clear separation of concerns. Notable practices include:

Single responsibility principle in test cases
Consistent fixture usage
Clear state transition validation
Explicit assertion messages
Proper test isolation

faif/python-patterns

tests/behavioral/test_state.py

            
import pytest

from patterns.behavioral.state import Radio


@pytest.fixture
def radio():
    return Radio()


def test_initial_state(radio):
    assert radio.state.name == "AM"


def test_initial_am_station(radio):
    initial_pos = radio.state.pos
    assert radio.state.stations[initial_pos] == "1250"


def test_toggle_amfm(radio):
    assert radio.state.name == "AM"

    radio.toggle_amfm()
    assert radio.state.name == "FM"

    radio.toggle_amfm()
    assert radio.state.name == "AM"