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import unittest
from sqlglot.lineage import lineage
class TestLineage(unittest.TestCase):
maxDiff = None
def test_lineage(self) -> None:
node = lineage(
"a",
"SELECT a FROM y",
schema={"x": {"a": "int"}},
sources={"y": "SELECT * FROM x"},
)
self.assertEqual(
node.source.sql(),
"SELECT y.a AS a FROM (SELECT x.a AS a FROM x AS x) AS y /* source: y */",
)
self.assertGreater(len(node.to_html()._repr_html_()), 1000)
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