fix: Fix capability name/NAME and add new test (#591)

Previous unit tests hid pretty well the fact that NAME wasn't set on capabilities.

src/steamship/plugin/capabilities.py

@@ -308,7 +308,7 @@ class SystemPromptSupport(CapabilityImpl):
     The system prompt will come across in other blocks on the request.
     """
 
-    name = "steamship.system_prompt_support"
+    NAME = "steamship.system_prompt_support"
 
     request_level = RequestLevel.BEST_EFFORT
     """
@@ -324,7 +324,7 @@ class ConversationSupport(CapabilityImpl):
     The content of the conversation will come across in other blocks on the request, using the CHAT TagKind.
     """
 
-    name = "steamship.conversation_support"
+    NAME = "steamship.conversation_support"
 
 
 class FunctionCallingSupport(CapabilityImpl):
@@ -335,7 +335,7 @@ class FunctionCallingSupport(CapabilityImpl):
     following request.
     """
 
-    name = "steamship.function_calling_support"
+    NAME = "steamship.function_calling_support"
 
     functions: List[Tool]
     """A list of Tools which the LLM can choose from to execute."""

tests/steamship_tests/plugin/unit/test_capabilities.py

@@ -10,9 +10,12 @@
     CapabilityImpl,
     CapabilityPluginRequest,
     CapabilityPluginResponse,
+    ConversationSupport,
+    FunctionCallingSupport,
     RequestedCapabilities,
     RequestLevel,
     SupportLevel,
+    SystemPromptSupport,
     UnsupportedCapabilityError,
 )
 
@@ -57,6 +60,25 @@ def test_is_plugin_support_valid(
         assert response.fulfilled_at in support_level
 
 
+def test_builtin_capabilities_support():
+    original_capabilities = {
+        ConversationSupport: ConversationSupport(),
+        SystemPromptSupport: SystemPromptSupport(),
+        FunctionCallingSupport: FunctionCallingSupport(functions=[]),
+    }
+    original = CapabilityPluginRequest(requested_capabilities=list(original_capabilities.values()))
+    block = original.to_block()
+    roundtripped = CapabilityPluginRequest.from_block(block)
+    assert original == roundtripped
+    requested_capabilities = RequestedCapabilities(
+        {cap_typ: SupportLevel.NATIVE for cap_typ in original_capabilities.keys()}
+    )
+    requested_capabilities.load_requests(roundtripped)
+    for cap_typ in original_capabilities.keys():
+        requested = requested_capabilities.get(cap_typ)
+        assert requested == original_capabilities[cap_typ]
+
+
 def test_capability_plugin_request_block_roundtrips():
     original = CapabilityPluginRequest(
         requested_capabilities=[TestCapability(request_level=RequestLevel.NATIVE)]