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import typing as t
import unittest
from sqlglot.dataframe.sql import types
from sqlglot.dataframe.sql.dataframe import DataFrame
from sqlglot.dataframe.sql.session import SparkSession
class DataFrameSQLValidator(unittest.TestCase):
def setUp(self) -> None:
self.spark = SparkSession()
self.employee_schema = types.StructType(
[
types.StructField("employee_id", types.IntegerType(), False),
types.StructField("fname", types.StringType(), False),
types.StructField("lname", types.StringType(), False),
types.StructField("age", types.IntegerType(), False),
types.StructField("store_id", types.IntegerType(), False),
]
)
employee_data = [
(1, "Jack", "Shephard", 37, 1),
(2, "John", "Locke", 65, 1),
(3, "Kate", "Austen", 37, 2),
(4, "Claire", "Littleton", 27, 2),
(5, "Hugo", "Reyes", 29, 100),
]
self.df_employee = self.spark.createDataFrame(data=employee_data, schema=self.employee_schema)
def compare_sql(self, df: DataFrame, expected_statements: t.Union[str, t.List[str]], pretty=False):
actual_sqls = df.sql(pretty=pretty)
expected_statements = [expected_statements] if isinstance(expected_statements, str) else expected_statements
self.assertEqual(len(expected_statements), len(actual_sqls))
for expected, actual in zip(expected_statements, actual_sqls):
self.assertEqual(expected, actual)
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