1 files changed, 60 insertions, 0 deletions
diff --git a/tests/dataframe/unit/test_window.py b/tests/dataframe/unit/test_window.py
new file mode 100644
index 0000000..eea4582
--- /dev/null
+++ b/tests/dataframe/unit/test_window.py
@@ -0,0 +1,60 @@
+import unittest
+
+from sqlglot.dataframe.sql import functions as F
+from sqlglot.dataframe.sql.window import Window, WindowSpec
+
+
+class TestDataframeWindow(unittest.TestCase):
+    def test_window_spec_partition_by(self):
+        partition_by = WindowSpec().partitionBy(F.col("cola"), F.col("colb"))
+        self.assertEqual("OVER (PARTITION BY cola, colb)", partition_by.sql())
+
+    def test_window_spec_order_by(self):
+        order_by = WindowSpec().orderBy("cola", "colb")
+        self.assertEqual("OVER (ORDER BY cola, colb)", order_by.sql())
+
+    def test_window_spec_rows_between(self):
+        rows_between = WindowSpec().rowsBetween(3, 5)
+        self.assertEqual("OVER ( ROWS BETWEEN 3 PRECEDING AND 5 FOLLOWING)", rows_between.sql())
+
+    def test_window_spec_range_between(self):
+        range_between = WindowSpec().rangeBetween(3, 5)
+        self.assertEqual("OVER ( RANGE BETWEEN 3 PRECEDING AND 5 FOLLOWING)", range_between.sql())
+
+    def test_window_partition_by(self):
+        partition_by = Window.partitionBy(F.col("cola"), F.col("colb"))
+        self.assertEqual("OVER (PARTITION BY cola, colb)", partition_by.sql())
+
+    def test_window_order_by(self):
+        order_by = Window.orderBy("cola", "colb")
+        self.assertEqual("OVER (ORDER BY cola, colb)", order_by.sql())
+
+    def test_window_rows_between(self):
+        rows_between = Window.rowsBetween(3, 5)
+        self.assertEqual("OVER ( ROWS BETWEEN 3 PRECEDING AND 5 FOLLOWING)", rows_between.sql())
+
+    def test_window_range_between(self):
+        range_between = Window.rangeBetween(3, 5)
+        self.assertEqual("OVER ( RANGE BETWEEN 3 PRECEDING AND 5 FOLLOWING)", range_between.sql())
+
+    def test_window_rows_unbounded(self):
+        rows_between_unbounded_start = Window.rowsBetween(Window.unboundedPreceding, 2)
+        self.assertEqual("OVER ( ROWS BETWEEN UNBOUNDED PRECEDING AND 2 FOLLOWING)", rows_between_unbounded_start.sql())
+        rows_between_unbounded_end = Window.rowsBetween(1, Window.unboundedFollowing)
+        self.assertEqual("OVER ( ROWS BETWEEN 1 PRECEDING AND UNBOUNDED FOLLOWING)", rows_between_unbounded_end.sql())
+        rows_between_unbounded_both = Window.rowsBetween(Window.unboundedPreceding, Window.unboundedFollowing)
+        self.assertEqual(
+            "OVER ( ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING)", rows_between_unbounded_both.sql()
+        )
+
+    def test_window_range_unbounded(self):
+        range_between_unbounded_start = Window.rangeBetween(Window.unboundedPreceding, 2)
+        self.assertEqual(
+            "OVER ( RANGE BETWEEN UNBOUNDED PRECEDING AND 2 FOLLOWING)", range_between_unbounded_start.sql()
+        )
+        range_between_unbounded_end = Window.rangeBetween(1, Window.unboundedFollowing)
+        self.assertEqual("OVER ( RANGE BETWEEN 1 PRECEDING AND UNBOUNDED FOLLOWING)", range_between_unbounded_end.sql())
+        range_between_unbounded_both = Window.rangeBetween(Window.unboundedPreceding, Window.unboundedFollowing)
+        self.assertEqual(
+            "OVER ( RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING)", range_between_unbounded_both.sql()
+        )