chore: Add getters for attributes and test happy path

Signed-off-by: Tudor Plugaru <plugaru.tudor@protonmail.com>

src/cloudevents/core/v1/event.py

@@ -127,15 +127,69 @@ class CloudEvent:
                     f"Extension attribute '{extension_attributes}' should only contain lowercase letters and numbers"
                 )
 
-    def get_attribute(self, attribute: str) -> Optional[Any]:
+    def get_id(self) -> str:
         """
-        Retrieve a value of an attribute of the event denoted by the given `attribute`.
+        Retrieve the ID of the event.
 
-        :param attribute: The name of the event attribute to retrieve the value for.
+        :return: The ID of the event.
-
-        :return: The event attribute value.
         """
-        return self._attributes[attribute]
+        return self._attributes["id"]
+
+    def get_source(self) -> str:
+        """
+        Retrieve the source of the event.
+
+        :return: The source of the event.
+        """
+        return self._attributes["source"]
+
+    def get_type(self) -> str:
+        """
+        Retrieve the type of the event.
+
+        :return: The type of the event.
+        """
+        return self._attributes["type"]
+
+    def get_specversion(self) -> str:
+        """
+        Retrieve the specversion of the event.
+
+        :return: The specversion of the event.
+        """
+        return self._attributes["specversion"]
+
+    def get_datacontenttype(self) -> Optional[str]:
+        """
+        Retrieve the datacontenttype of the event.
+
+        :return: The datacontenttype of the event.
+        """
+        return self._attributes.get("datacontenttype")
+
+    def get_dataschema(self) -> Optional[str]:
+        """
+        Retrieve the dataschema of the event.
+
+        :return: The dataschema of the event.
+        """
+        return self._attributes.get("dataschema")
+
+    def get_subject(self) -> Optional[str]:
+        """
+        Retrieve the subject of the event.
+
+        :return: The subject of the event.
+        """
+        return self._attributes.get("subject")
+
+    def get_time(self) -> Optional[datetime]:
+        """
+        Retrieve the time of the event.
+
+        :return: The time of the event.
+        """
+        return self._attributes.get("time")
 
     def get_data(self) -> Optional[dict]:
         """

tests/test_core/test_v1/test_event.py

@@ -15,7 +15,7 @@
 from cloudevents.core.v1.event import CloudEvent
 
 import pytest
-from datetime import datetime
+from datetime import datetime, timezone
 from typing import Any, Optional
 
 
@@ -207,3 +207,39 @@ def test_custom_extension(extension_name: str, error: str) -> None:
         )
 
     assert str(e.value) == error
+
+
+def test_cloud_event_constructor() -> None:
+    id = "1"
+    source = "/source"
+    type = "com.test.type"
+    specversion = "1.0"
+    datacontenttype = "application/json"
+    dataschema = "http://example.com/schema"
+    subject = "test_subject"
+    time = datetime.now(tz=timezone.utc)
+    data = {"key": "value"}
+
+    event = CloudEvent(
+        attributes={
+            "id": id,
+            "source": source,
+            "type": type,
+            "specversion": specversion,
+            "datacontenttype": datacontenttype,
+            "dataschema": dataschema,
+            "subject": subject,
+            "time": time,
+        },
+        data=data,
+    )
+
+    assert event.get_id() == id
+    assert event.get_source() == source
+    assert event.get_type() == type
+    assert event.get_specversion() == specversion
+    assert event.get_datacontenttype() == datacontenttype
+    assert event.get_dataschema() == dataschema
+    assert event.get_subject() == subject
+    assert event.get_time() == time
+    assert event.get_data() == data