Added pytest configuration and first 4 unit tests

tests/utils/test_database.py

@@ -0,0 +1,150 @@
+import os
+import pytest
+import uuid
+from datetime import datetime, timezone
+from unittest.mock import patch, MagicMock
+from sqlalchemy.pool import StaticPool
+from sqlalchemy.orm import Session, sessionmaker, declarative_base
+from sqlalchemy import create_engine, TypeDecorator, TEXT, Column, String, DateTime, UniqueConstraint, ForeignKey, Boolean, Integer
+from app.utils.database import get_db_credentials, get_db
+
+# Create a mock-specific Base class for testing
+MockBase = declarative_base()
+
+class SQLiteUUID(TypeDecorator):
+    """Enables UUID support for SQLite."""
+    impl = TEXT
+    cache_ok = True
+
+    def process_bind_param(self, value, dialect):
+        if value is None:
+            return value
+        return str(value)
+
+    def process_result_value(self, value, dialect):
+        if value is None:
+            return value
+        return uuid.UUID(value)
+
+# Model classes for testing - prefix with Mock to avoid pytest collection
+class MockPriority(MockBase):
+    __tablename__ = "priorities"
+    id = Column(Integer, primary_key=True)
+    description = Column(String, nullable=False)
+
+class MockChannelDB(MockBase):
+    __tablename__ = "channels"
+    id = Column(SQLiteUUID(), primary_key=True, default=uuid.uuid4)
+    tvg_id = Column(String, nullable=False)
+    name = Column(String, nullable=False)
+    group_title = Column(String, nullable=False)
+    tvg_name = Column(String)
+    __table_args__ = (
+        UniqueConstraint('group_title', 'name', name='uix_group_title_name'),
+    )
+    tvg_logo = Column(String)
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+class MockChannelURL(MockBase):
+    __tablename__ = "channels_urls"
+    id = Column(SQLiteUUID(), primary_key=True, default=uuid.uuid4)
+    channel_id = Column(SQLiteUUID(), ForeignKey('channels.id', ondelete='CASCADE'), nullable=False)
+    url = Column(String, nullable=False)
+    in_use = Column(Boolean, default=False, nullable=False)
+    priority_id = Column(Integer, ForeignKey('priorities.id'), nullable=False)
+    created_at = Column(DateTime, default=lambda: datetime.now(timezone.utc))
+    updated_at = Column(DateTime, default=lambda: datetime.now(timezone.utc), onupdate=lambda: datetime.now(timezone.utc))
+
+# Create test engine
+TEST_ENGINE = create_engine(
+    "sqlite:///:memory:",
+    connect_args={"check_same_thread": False},
+    poolclass=StaticPool
+)
+
+# Create test session
+TEST_SESSION = sessionmaker(autocommit=False, autoflush=False, bind=TEST_ENGINE)
+
+# Mock the actual database functions
+def mock_get_db():
+    db = TEST_SESSION()
+    try:
+        yield db
+    finally:
+        db.close()
+
+@pytest.fixture(scope="session", autouse=True)
+def create_test_tables():
+    """Create test database tables for all tests"""
+    MockBase.metadata.create_all(bind=TEST_ENGINE)
+
+@pytest.fixture(autouse=True)
+def mock_db_engine(monkeypatch):
+    """Fixture to mock database engine and session for each test"""
+    # First mock get_db_credentials to prevent real connection attempts
+    def mock_credentials():
+        return "sqlite:///:memory:"
+    monkeypatch.setattr('app.utils.database.get_db_credentials', mock_credentials)
+    
+    # Then patch the actual database functions
+    monkeypatch.setattr('app.utils.database.engine', TEST_ENGINE)
+    monkeypatch.setattr('app.utils.database.SessionLocal', TEST_SESSION)
+    monkeypatch.setattr('app.utils.database.get_db', mock_get_db)
+
+@pytest.fixture(autouse=True)
+def mock_env(monkeypatch):
+    """Fixture for mocking environment variables"""
+    # Clear any existing env vars first
+    monkeypatch.delenv("MOCK_AUTH", raising=False)
+    monkeypatch.delenv("DB_USER", raising=False)
+    monkeypatch.delenv("DB_PASSWORD", raising=False)
+    monkeypatch.delenv("DB_HOST", raising=False)
+    monkeypatch.delenv("DB_NAME", raising=False)
+    
+    # Set mock values
+    monkeypatch.setenv("MOCK_AUTH", "true")
+    monkeypatch.setenv("DB_USER", "testuser")
+    monkeypatch.setenv("DB_PASSWORD", "testpass")
+    monkeypatch.setenv("DB_HOST", "localhost")
+    monkeypatch.setenv("DB_NAME", "testdb")
+    monkeypatch.setenv("AWS_REGION", "us-east-1")  # Mock AWS region
+
+@pytest.fixture
+def mock_ssm():
+    """Fixture for mocking boto3 SSM client"""
+    with patch('boto3.client') as mock_client:
+        mock_ssm = MagicMock()
+        mock_client.return_value = mock_ssm
+        mock_ssm.get_parameter.return_value = {
+            'Parameter': {'Value': 'mocked_value'}
+        }
+        yield mock_ssm
+
+def test_get_db_credentials_env(mock_env):
+    """Test getting DB credentials from environment variables"""
+    conn_str = get_db_credentials()
+    assert conn_str == "postgresql://testuser:testpass@localhost/testdb"
+
+def test_get_db_credentials_ssm(mock_ssm):
+    """Test getting DB credentials from SSM"""
+    os.environ.pop("MOCK_AUTH", None)
+    conn_str = get_db_credentials()
+    assert "postgresql://mocked_value:mocked_value@mocked_value/mocked_value" in conn_str
+    mock_ssm.get_parameter.assert_called()
+
+def test_session_creation():
+    """Test database session creation"""
+    session = TEST_SESSION()
+    assert isinstance(session, Session)
+    session.close()
+
+def test_get_db_generator():
+    """Test get_db dependency generator"""
+    db_gen = get_db()
+    db = next(db_gen)
+    assert isinstance(db, Session)
+    try:
+        next(db_gen)  # Should raise StopIteration
+    except StopIteration:
+        pass