File size: 8,860 Bytes
21a86d3 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 |
"""
Test the parquet module.
Mostly auto-generated by Cursor + GPT-5.
"""
import os
import tempfile
from typing import Any
import pandas as pd
import pytest
from sqlalchemy import create_engine, text
from sqlalchemy.engine import Engine
from sqlmodel import Field, Session, SQLModel
from parquet import export_to_parquet, import_from_parquet
# Test model for creating temporary tables
class DummyUser(SQLModel, table=True):
id: int = Field(primary_key=True)
name: str = Field(max_length=100)
email: str = Field(max_length=255)
age: int = Field()
class DummyProduct(SQLModel, table=True):
id: int = Field(primary_key=True)
name: str = Field(max_length=200)
price: float = Field()
category: str = Field(max_length=100)
@pytest.fixture
def temp_db_engine():
"""Create a temporary SQLite database engine for testing."""
# Create temporary database file
temp_db = tempfile.NamedTemporaryFile(delete=False, suffix=".db")
temp_db.close()
# Create engine
engine = create_engine(f"sqlite:///{temp_db.name}")
# Create tables
SQLModel.metadata.create_all(engine)
yield engine
# Cleanup
engine.dispose()
os.unlink(temp_db.name)
@pytest.fixture
def sample_data():
"""Sample data for testing."""
users_data = [
{"id": 1, "name": "Alice", "email": "[email protected]", "age": 30},
{"id": 2, "name": "Bob", "email": "[email protected]", "age": 25},
{"id": 3, "name": "Charlie", "email": "[email protected]", "age": 35},
]
products_data = [
{"id": 1, "name": "Laptop", "price": 999.99, "category": "Electronics"},
{"id": 2, "name": "Book", "price": 19.99, "category": "Education"},
{"id": 3, "name": "Coffee", "price": 4.99, "category": "Food"},
]
return {"users": users_data, "products": products_data}
@pytest.fixture
def populated_db(temp_db_engine: Engine, sample_data: dict[str, list[dict[str, Any]]]):
"""Populate the temporary database with sample data."""
with Session(temp_db_engine) as session:
# Insert users
for user_data in sample_data["users"]:
user = DummyUser(**user_data)
session.add(user)
# Insert products
for product_data in sample_data["products"]:
product = DummyProduct(**product_data)
session.add(product)
session.commit()
return temp_db_engine
def test_export_to_parquet_success(
populated_db: Engine, sample_data: dict[str, list[dict[str, Any]]]
):
"""Test successful export of tables to parquet files."""
with tempfile.TemporaryDirectory() as temp_dir:
export_to_parquet(populated_db, temp_dir)
# Check that files were created
assert os.path.exists(os.path.join(temp_dir, "dummyuser.parquet"))
assert os.path.exists(os.path.join(temp_dir, "dummyproduct.parquet"))
# Verify data integrity
users_df = pd.read_parquet(os.path.join(temp_dir, "dummyuser.parquet"))
products_df = pd.read_parquet(os.path.join(temp_dir, "dummyproduct.parquet"))
assert len(users_df) == len(sample_data["users"])
assert len(products_df) == len(sample_data["products"])
# Check that data is sorted
assert users_df.equals(
users_df.sort_values(by=list(users_df.columns)).reset_index(drop=True)
)
assert products_df.equals(
products_df.sort_values(by=list(products_df.columns)).reset_index(drop=True)
)
def test_export_to_parquet_empty_table(temp_db_engine: Engine):
"""Test export with empty table."""
with tempfile.TemporaryDirectory() as temp_dir:
export_to_parquet(temp_db_engine, temp_dir)
# Should create file but skip empty table
assert os.path.exists(os.path.join(temp_dir, "dummyuser.parquet"))
assert os.path.exists(os.path.join(temp_dir, "dummyproduct.parquet"))
def test_export_to_parquet_creates_directory(populated_db):
"""Test that export creates the backup directory if it doesn't exist."""
temp_dir = os.path.join(tempfile.gettempdir(), "test_backup_dir")
try:
export_to_parquet(populated_db, temp_dir)
assert os.path.exists(temp_dir)
assert os.path.isdir(temp_dir)
finally:
if os.path.exists(temp_dir):
import shutil
shutil.rmtree(temp_dir)
def test_import_from_parquet_success(
populated_db: Engine, sample_data: dict[str, list[dict[str, Any]]]
):
"""Test successful import from parquet files."""
with tempfile.TemporaryDirectory() as temp_dir:
# First export
export_to_parquet(populated_db, temp_dir)
# Clear the database
with Session(populated_db) as session:
session.exec(text("DELETE FROM dummyuser"))
session.exec(text("DELETE FROM dummyproduct"))
session.commit()
# Verify tables are empty
with Session(populated_db) as session:
users = session.exec(text("SELECT COUNT(*) FROM dummyuser")).first()
products = session.exec(text("SELECT COUNT(*) FROM dummyproduct")).first()
assert users[0] == 0
assert products[0] == 0
# Import from parquet
import_from_parquet(populated_db, temp_dir)
# Verify data was imported
with Session(populated_db) as session:
users = session.exec(text("SELECT COUNT(*) FROM dummyuser")).first()
products = session.exec(text("SELECT COUNT(*) FROM dummyproduct")).first()
assert users[0] == len(sample_data["users"])
assert products[0] == len(sample_data["products"])
def test_import_from_parquet_missing_file(populated_db: Engine):
"""Test import handles missing parquet files gracefully."""
with tempfile.TemporaryDirectory() as temp_dir:
# Don't create any parquet files
import_from_parquet(populated_db, temp_dir)
# Should not raise an error, just skip missing files
def test_import_from_parquet_clears_existing_data(populated_db: Engine):
"""Test that import clears existing data before inserting new data."""
with tempfile.TemporaryDirectory() as temp_dir:
# First export
export_to_parquet(populated_db, temp_dir)
# Modify data in database
with Session(populated_db) as session:
session.exec(text("UPDATE dummyuser SET name = 'Modified' WHERE id = 1"))
session.commit()
# Verify modification
with Session(populated_db) as session:
result = session.exec(
text("SELECT name FROM dummyuser WHERE id = 1")
).first()
assert result[0] == "Modified"
# Import should clear and restore original data
import_from_parquet(populated_db, temp_dir)
# Original name restored
with Session(populated_db) as session:
result = session.exec(
text("SELECT name FROM dummyuser WHERE id = 1")
).first()
assert result[0] == "Alice"
def test_export_import_cycle(
populated_db: Engine, sample_data: dict[str, list[dict[str, Any]]]
):
"""Test complete export and import cycle maintains data integrity."""
with tempfile.TemporaryDirectory() as temp_dir:
# Export
export_to_parquet(populated_db, temp_dir)
# Clear database
with Session(populated_db) as session:
session.exec(text("DELETE FROM dummyuser"))
session.exec(text("DELETE FROM dummyproduct"))
session.commit()
# Import
import_from_parquet(populated_db, temp_dir)
# Verify data integrity
with Session(populated_db) as session:
# Check users
users_result = session.exec(
text("SELECT * FROM dummyuser ORDER BY id")
).fetchall()
assert len(users_result) == len(sample_data["users"])
for i, user in enumerate(users_result):
assert user[0] == sample_data["users"][i]["id"]
assert user[1] == sample_data["users"][i]["name"]
assert user[2] == sample_data["users"][i]["email"]
assert user[3] == sample_data["users"][i]["age"]
# Check products
products_result = session.exec(
text("SELECT * FROM dummyproduct ORDER BY id")
).fetchall()
assert len(products_result) == len(sample_data["products"])
for i, product in enumerate(products_result):
assert product[0] == sample_data["products"][i]["id"]
assert product[1] == sample_data["products"][i]["name"]
assert product[2] == sample_data["products"][i]["price"]
assert product[3] == sample_data["products"][i]["category"]
|