1 files changed, 70 insertions, 0 deletions
diff --git a/tests/dataframe/unit/test_types.py b/tests/dataframe/unit/test_types.py
new file mode 100644
index 0000000..1f6c5dc
--- /dev/null
+++ b/tests/dataframe/unit/test_types.py
@@ -0,0 +1,70 @@
+import unittest
+
+from sqlglot.dataframe.sql import types
+
+
+class TestDataframeTypes(unittest.TestCase):
+    def test_string(self):
+        self.assertEqual("string", types.StringType().simpleString())
+
+    def test_char(self):
+        self.assertEqual("char(100)", types.CharType(100).simpleString())
+
+    def test_varchar(self):
+        self.assertEqual("varchar(65)", types.VarcharType(65).simpleString())
+
+    def test_binary(self):
+        self.assertEqual("binary", types.BinaryType().simpleString())
+
+    def test_boolean(self):
+        self.assertEqual("boolean", types.BooleanType().simpleString())
+
+    def test_date(self):
+        self.assertEqual("date", types.DateType().simpleString())
+
+    def test_timestamp(self):
+        self.assertEqual("timestamp", types.TimestampType().simpleString())
+
+    def test_timestamp_ntz(self):
+        self.assertEqual("timestamp_ntz", types.TimestampNTZType().simpleString())
+
+    def test_decimal(self):
+        self.assertEqual("decimal(10, 3)", types.DecimalType(10, 3).simpleString())
+
+    def test_double(self):
+        self.assertEqual("double", types.DoubleType().simpleString())
+
+    def test_float(self):
+        self.assertEqual("float", types.FloatType().simpleString())
+
+    def test_byte(self):
+        self.assertEqual("tinyint", types.ByteType().simpleString())
+
+    def test_integer(self):
+        self.assertEqual("int", types.IntegerType().simpleString())
+
+    def test_long(self):
+        self.assertEqual("bigint", types.LongType().simpleString())
+
+    def test_short(self):
+        self.assertEqual("smallint", types.ShortType().simpleString())
+
+    def test_array(self):
+        self.assertEqual("array<int>", types.ArrayType(types.IntegerType()).simpleString())
+
+    def test_map(self):
+        self.assertEqual("map<int, string>", types.MapType(types.IntegerType(), types.StringType()).simpleString())
+
+    def test_struct_field(self):
+        self.assertEqual("cola:int", types.StructField("cola", types.IntegerType()).simpleString())
+
+    def test_struct_type(self):
+        self.assertEqual(
+            "struct<cola:int, colb:string>",
+            types.StructType(
+                [
+                    types.StructField("cola", types.IntegerType()),
+                    types.StructField("colb", types.StringType()),
+                ]
+            ).simpleString(),
+        )