test(convert): cover roundtrip validation for all data types

python/cocoindex/convert.py

@@ -18,6 +18,7 @@
     encode_enriched_type,
     extract_ndarray_scalar_dtype,
     is_namedtuple_type,
+    is_struct_type,
 )
 
 
@@ -37,9 +38,15 @@ def encode_engine_value(value: Any) -> Any:
     if isinstance(value, (list, tuple)):
         return [encode_engine_value(v) for v in value]
     if isinstance(value, dict):
-        return [
-            [encode_engine_value(k)] + encode_engine_value(v) for k, v in value.items()
-        ]
+        if not value:
+            return {}
+
+        first_val = next(iter(value.values()))
+        if is_struct_type(type(first_val)):  # KTable
+            return [
+                [encode_engine_value(k)] + encode_engine_value(v)
+                for k, v in value.items()
+            ]
     return value
 
 

python/cocoindex/tests/test_convert.py

@@ -93,7 +93,7 @@ def validate_full_roundtrip_to(
     def eq(a: Any, b: Any) -> bool:
         if isinstance(a, np.ndarray) and isinstance(b, np.ndarray):
             return np.array_equal(a, b)
-        return type(a) == type(b) and not not (a == b)
+        return type(a) is type(b) and not not (a == b)
 
     encoded_value = encode_engine_value(value)
     value_type = value_type or type(value)
@@ -229,6 +229,11 @@ def test_encode_engine_value_none() -> None:
 
 
 def test_roundtrip_basic_types() -> None:
+    validate_full_roundtrip(b"hello world", bytes, (b"hello world", None))
+    validate_full_roundtrip(b"\x00\x01\x02\xff\xfe", bytes)
+    validate_full_roundtrip("hello", str, ("hello", None))
+    validate_full_roundtrip(True, bool, (True, None))
+    validate_full_roundtrip(False, bool, (False, None))
     validate_full_roundtrip(
         42, cocoindex.Int64, (42, int), (np.int64(42), np.int64), (42, None)
     )
@@ -252,10 +257,29 @@ def test_roundtrip_basic_types() -> None:
     )
     validate_full_roundtrip(np.float32(3.25), np.float32, (3.25, Float32))
 
-    validate_full_roundtrip("hello", str, ("hello", None))
-    validate_full_roundtrip(True, bool, (True, None))
-    validate_full_roundtrip(False, bool, (False, None))
-    validate_full_roundtrip((1, 2), cocoindex.Range, ((1, 2), None))
+
+def test_roundtrip_uuid() -> None:
+    uuid_value = uuid.uuid4()
+    validate_full_roundtrip(uuid_value, uuid.UUID, (uuid_value, None))
+
+
+def test_roundtrip_range() -> None:
+    r1 = (0, 100)
+    validate_full_roundtrip(r1, cocoindex.Range, (r1, None))
+    r2 = (50, 50)
+    validate_full_roundtrip(r2, cocoindex.Range, (r2, None))
+    r3 = (0, 1_000_000_000)
+    validate_full_roundtrip(r3, cocoindex.Range, (r3, None))
+
+
+def test_roundtrip_time() -> None:
+    t1 = datetime.time(10, 30, 50, 123456)
+    validate_full_roundtrip(t1, datetime.time, (t1, None))
+    t2 = datetime.time(23, 59, 59)
+    validate_full_roundtrip(t2, datetime.time, (t2, None))
+    t3 = datetime.time(0, 0, 0)
+    validate_full_roundtrip(t3, datetime.time, (t3, None))
+
     validate_full_roundtrip(
         datetime.date(2025, 1, 1), datetime.date, (datetime.date(2025, 1, 1), None)
     )
@@ -297,8 +321,38 @@ def test_roundtrip_basic_types() -> None:
         ),
     )
 
-    uuid_value = uuid.uuid4()
-    validate_full_roundtrip(uuid_value, uuid.UUID, (uuid_value, None))
+
+def test_roundtrip_timedelta() -> None:
+    td1 = datetime.timedelta(
+        days=5, seconds=10, microseconds=123, milliseconds=456, minutes=30, hours=2
+    )
+    validate_full_roundtrip(td1, datetime.timedelta, (td1, None))
+    td2 = datetime.timedelta(days=-5, hours=-2)
+    validate_full_roundtrip(td2, datetime.timedelta, (td2, None))
+    td3 = datetime.timedelta(0)
+    validate_full_roundtrip(td3, datetime.timedelta, (td3, None))
+
+
+def test_roundtrip_json() -> None:
+    simple_dict = {"key": "value", "number": 123, "bool": True, "float": 1.23}
+    validate_full_roundtrip(simple_dict, cocoindex.Json)
+
+    simple_list = [1, "string", False, None, 4.56]
+    validate_full_roundtrip(simple_list, cocoindex.Json)
+
+    nested_structure = {
+        "name": "Test Json",
+        "version": 1.0,
+        "items": [
+            {"id": 1, "value": "item1"},
+            {"id": 2, "value": None, "props": {"active": True}},
+        ],
+        "metadata": None,
+    }
+    validate_full_roundtrip(nested_structure, cocoindex.Json)
+
+    validate_full_roundtrip({}, cocoindex.Json)
+    validate_full_roundtrip([], cocoindex.Json)
 
 
 def test_decode_scalar_numpy_values() -> None:
@@ -675,6 +729,21 @@ def test_roundtrip_union_with_vector() -> None:
     validate_full_roundtrip(value, t, ([1.0, 2.0, 3.0], list[float] | str))
 
 
+def test_roundtrip_union_with_misc_types() -> None:
+    t_bytes_union = int | bytes | str
+    validate_full_roundtrip(b"test_bytes", t_bytes_union)
+    validate_full_roundtrip(123, t_bytes_union)
+
+    t_range_union = cocoindex.Range | str | bool
+    validate_full_roundtrip((100, 200), t_range_union)
+    validate_full_roundtrip("test_string", t_range_union)
+
+    t_json_union = cocoindex.Json | int | bytes
+    json_dict = {"a": 1, "b": [2, 3]}
+    validate_full_roundtrip(json_dict, t_json_union)
+    validate_full_roundtrip(b"another_byte_string", t_json_union)
+
+
 def test_roundtrip_ltable() -> None:
     t = list[Order]
     value = [Order("O1", "item1", 10.0), Order("O2", "item2", 20.0)]
@@ -688,10 +757,26 @@ def test_roundtrip_ltable() -> None:
     validate_full_roundtrip(value_nt, t_nt)
 
 
-def test_roundtrip_ktable_str_key() -> None:
-    t = dict[str, Order]
-    value = {"K1": Order("O1", "item1", 10.0), "K2": Order("O2", "item2", 20.0)}
-    validate_full_roundtrip(value, t)
+def test_roundtrip_ktable_various_key_types() -> None:
+    @dataclass
+    class SimpleValue:
+        data: str
+
+    t_bytes_key = dict[bytes, SimpleValue]
+    value_bytes_key = {b"key1": SimpleValue("val1"), b"key2": SimpleValue("val2")}
+    validate_full_roundtrip(value_bytes_key, t_bytes_key)
+
+    t_int_key = dict[int, SimpleValue]
+    value_int_key = {1: SimpleValue("val1"), 2: SimpleValue("val2")}
+    validate_full_roundtrip(value_int_key, t_int_key)
+
+    t_bool_key = dict[bool, SimpleValue]
+    value_bool_key = {True: SimpleValue("val_true"), False: SimpleValue("val_false")}
+    validate_full_roundtrip(value_bool_key, t_bool_key)
+
+    t_str_key = dict[str, Order]
+    value_str_key = {"K1": Order("O1", "item1", 10.0), "K2": Order("O2", "item2", 20.0)}
+    validate_full_roundtrip(value_str_key, t_str_key)
 
     t_nt = dict[str, OrderNamedTuple]
     value_nt = {
@@ -700,6 +785,27 @@ def test_roundtrip_ktable_str_key() -> None:
     }
     validate_full_roundtrip(value_nt, t_nt)
 
+    t_range_key = dict[cocoindex.Range, SimpleValue]
+    value_range_key = {
+        (1, 10): SimpleValue("val_range1"),
+        (20, 30): SimpleValue("val_range2"),
+    }
+    validate_full_roundtrip(value_range_key, t_range_key)
+
+    t_date_key = dict[datetime.date, SimpleValue]
+    value_date_key = {
+        datetime.date(2023, 1, 1): SimpleValue("val_date1"),
+        datetime.date(2024, 2, 2): SimpleValue("val_date2"),
+    }
+    validate_full_roundtrip(value_date_key, t_date_key)
+
+    t_uuid_key = dict[uuid.UUID, SimpleValue]
+    value_uuid_key = {
+        uuid.uuid4(): SimpleValue("val_uuid1"),
+        uuid.uuid4(): SimpleValue("val_uuid2"),
+    }
+    validate_full_roundtrip(value_uuid_key, t_uuid_key)
+
 
 def test_roundtrip_ktable_struct_key() -> None:
     @dataclass(frozen=True)
@@ -990,6 +1096,24 @@ def test_full_roundtrip_vector_numeric_types() -> None:
         validate_full_roundtrip(value_u64, Vector[np.uint64, Literal[3]])
 
 
+def test_full_roundtrip_vector_other_types() -> None:
+    """Test full roundtrip for Vector with non-numeric basic types."""
+    uuid_list = [uuid.uuid4(), uuid.uuid4()]
+    validate_full_roundtrip(uuid_list, Vector[uuid.UUID], (uuid_list, list[uuid.UUID]))
+
+    date_list = [datetime.date(2023, 1, 1), datetime.date(2024, 10, 5)]
+    validate_full_roundtrip(
+        date_list, Vector[datetime.date], (date_list, list[datetime.date])
+    )
+
+    bool_list = [True, False, True, False]
+    validate_full_roundtrip(bool_list, Vector[bool], (bool_list, list[bool]))
+
+    validate_full_roundtrip([], Vector[uuid.UUID], ([], list[uuid.UUID]))
+    validate_full_roundtrip([], Vector[datetime.date], ([], list[datetime.date]))
+    validate_full_roundtrip([], Vector[bool], ([], list[bool]))
+
+
 def test_roundtrip_vector_no_dimension() -> None:
     """Test full roundtrip for vector types without dimension annotation."""
     value_f64 = np.array([1.0, 2.0, 3.0], dtype=np.float64)

python/cocoindex/typing.py

@@ -108,7 +108,7 @@ def is_namedtuple_type(t: type) -> bool:
     return isinstance(t, type) and issubclass(t, tuple) and hasattr(t, "_fields")
 
 
-def _is_struct_type(t: ElementType | None) -> bool:
+def is_struct_type(t: ElementType | None) -> bool:
     return isinstance(t, type) and (
         dataclasses.is_dataclass(t) or is_namedtuple_type(t)
     )
@@ -205,7 +205,7 @@ def analyze_type_info(t: Any) -> AnalyzedTypeInfo:
     union_variant_types: typing.List[ElementType] | None = None
     key_type: type | None = None
     np_number_type: type | None = None
-    if _is_struct_type(t):
+    if is_struct_type(t):
         struct_type = t
 
         if kind is None:
@@ -220,7 +220,7 @@ def analyze_type_info(t: Any) -> AnalyzedTypeInfo:
         elem_type = args[0]
 
         if kind is None:
-            if _is_struct_type(elem_type):
+            if is_struct_type(elem_type):
                 kind = "LTable"
                 if vector_info is not None:
                     raise ValueError(
@@ -243,7 +243,7 @@ def analyze_type_info(t: Any) -> AnalyzedTypeInfo:
         args = typing.get_args(t)
         elem_type = (args[0], args[1])
         kind = "KTable"
-    elif base_type is types.UnionType:
+    elif base_type in (types.UnionType, typing.Union):
         possible_types = typing.get_args(t)
         non_none_types = [
             arg for arg in possible_types if arg not in (None, types.NoneType)