Add validation for number of datetimes in Temporal.interval

pyproject.toml

@@ -22,7 +22,7 @@ classifiers = [
     "Typing :: Typed",
 ]
 version = "0.5.0"
-dependencies = ["pydantic>=2.3,<3"]
+dependencies = ["pydantic>=2.3,<3", "typing-extensions>=4.12.2"]
 
 [project.optional-dependencies]
 test = ["pytest", "pytest-cov"]

src/edr_pydantic/extent.py

@@ -2,7 +2,9 @@
 from typing import Optional
 from typing import Union
 
+from annotated_types import Len
 from pydantic import AwareDatetime
+from typing_extensions import Annotated
 
 from .base_model import EdrBaseModel
 
@@ -13,8 +15,7 @@ class Spatial(EdrBaseModel):
 
 
 class Temporal(EdrBaseModel):
-    # TODO: Validate this list has two items (C.7.  Temporal Object)
-    interval: List[List[AwareDatetime]]
+    interval: List[Annotated[List[AwareDatetime], Len(min_length=2, max_length=2)]]
     # TODO: Validate this is a list of ISO 8601 single time, ISO 8601 time duration or ISO 8601 interval
     values: List[str]
     trs: str

tests/test_data/temporal-interval-length1.json

@@ -0,0 +1,11 @@
+{
+    "interval": [
+        [
+            "2020-04-19T11:00:00Z"
+        ]
+    ],
+    "values": [
+        "2020-04-19T11:00:00Z/2020-06-30T09:00:00Z"
+    ],
+    "trs": "TIMECRS[\"DateTime\",TDATUM[\"Gregorian Calendar\"],CS[TemporalDateTime,1],AXIS[\"Time (T)\",future]]"
+}

tests/test_data/temporal-interval-length3.json

@@ -0,0 +1,13 @@
+{
+    "interval": [
+        [
+            "2020-04-19T11:00:00Z",
+            "2020-04-19T12:00:00Z",
+            "2020-04-19T13:00:00Z"
+        ]
+    ],
+    "values": [
+        "2020-04-19T11:00:00Z/2020-06-30T09:00:00Z"
+    ],
+    "trs": "TIMECRS[\"DateTime\",TDATUM[\"Gregorian Calendar\"],CS[TemporalDateTime,1],AXIS[\"Time (T)\",future]]"
+}

tests/test_edr.py

@@ -7,6 +7,7 @@
 from edr_pydantic.collections import Collections
 from edr_pydantic.collections import Instance
 from edr_pydantic.extent import Extent
+from edr_pydantic.extent import Temporal
 from edr_pydantic.parameter import Parameter
 from edr_pydantic.unit import Unit
 from pydantic import RootModel
@@ -35,7 +36,11 @@ def test_happy_cases(file_name, object_type):
     assert object_type.model_validate_json(json_string).model_dump_json(exclude_none=True) == json_string
 
 
-error_cases = [("label-or-symbol-unit.json", Unit, r"Either 'label' or 'symbol' should be set")]
+error_cases = [
+    ("label-or-symbol-unit.json", Unit, r"Either 'label' or 'symbol' should be set"),
+    ("temporal-interval-length1.json", Temporal, r"List should have at least 2 items after validation"),
+    ("temporal-interval-length3.json", Temporal, r"List should have at most 2 items after validation, not 3"),
+]
 
 
 @pytest.mark.parametrize("file_name, object_type, error_message", error_cases)