test: add test for TTL

tests/integration/adapter/clickhouse/test_clickhouse_table_ttl.py

@@ -0,0 +1,54 @@
+import pytest
+from dbt.tests.util import run_dbt
+from dbt.tests.adapter.basic.test_base import BaseSimpleMaterializations
+from dbt.tests.adapter.basic.files import model_base, schema_base_yml
+from dbt.tests.util import (
+    relation_from_name,
+    run_dbt,
+)
+import time
+
+class TestTableTTL(BaseSimpleMaterializations):
+    @pytest.fixture(scope="class")
+    def models(self):
+        config_materialized_table = """
+          {{ config(
+            order_by='(some_date, id, name)',
+            engine='MergeTree()',
+            materialized='table',
+            settings={'allow_nullable_key': 1},
+            ttl='some_date + INTERVAL 5 SECONDS'
+            query_settings={'allow_nondeterministic_mutations': 1})
+        }}
+        """
+        base_table_sql = config_materialized_table + model_base
+        return {
+            "table_model.sql": base_table_sql,
+            "schema.yml": schema_base_yml,
+        }
+
+    def test_base(self, project):
+        # seed command
+        results = run_dbt(["seed"])
+        # seed result length
+        assert len(results) == 1
+
+        # run command
+        results = run_dbt()
+        # run result length
+        assert len(results) == 1
+
+        # base table rowcount
+        relation = relation_from_name(project.adapter, "table_model")
+        result = project.run_sql(f"select count(*) as num_rows from {relation}", fetch="one")
+        assert result[0] == 10
+
+        # wait for TTL to expire
+        time.sleep(6)
+
+        # optimize table
+        final = project.run_sql(f"OPTIMIZE TABLE {relation} FINAL")
+
+        # make sure is empty
+        result = project.run_sql(f"select count(*) as num_rows from {relation}", fetch="one")
+        assert result[0] == 0