[python] Add mock_api coverage for single-discriminator no-subtypes scenario

.chronus/changes/add-python-single-discriminator-no-subtypes-tests-2026-6-4-23-29-0.md

@@ -0,0 +1,7 @@
+---
+changeKind: internal
+packages:
+  - "@typespec/http-client-python"
+---
+
+Add sync and async mock_api tests for the single-discriminator no-subtypes Spector scenario from http-specs.

packages/http-client-python/package.json

@@ -115,7 +115,7 @@
     "@typespec/sse": "~0.82.0",
     "@typespec/streams": "~0.82.0",
     "@typespec/xml": "~0.82.0",
-    "@typespec/http-specs": "0.1.0-alpha.37",
+    "@typespec/http-specs": "0.1.0-alpha.38-dev.1",
     "@types/js-yaml": "~4.0.5",
     "@types/node": "~25.0.2",
     "@types/semver": "7.5.8",

packages/http-client-python/tests/mock_api/shared/asynctests/test_typetest_model_inheritance_single_discriminator_async.py

@@ -6,7 +6,7 @@
 import pytest
 import pytest_asyncio
 from typetest.model.singlediscriminator.aio import SingleDiscriminatorClient
-from typetest.model.singlediscriminator.models import Sparrow, Eagle, Bird, Dinosaur
+from typetest.model.singlediscriminator.models import Sparrow, Eagle, Bird, Dinosaur, Fish
 
 
 @pytest_asyncio.fixture
@@ -63,6 +63,16 @@ async def test_get_wrong_discriminator(client):
     assert await client.get_wrong_discriminator() == Bird(wingspan=1, kind="wrongKind")
 
 
+@pytest.mark.asyncio
+async def test_get_no_subtypes_model(client):
+    assert await client.get_no_subtypes_model() == Fish(kind="salmon", size=10)
+
+
+@pytest.mark.asyncio
+async def test_put_no_subtypes_model(client):
+    await client.put_no_subtypes_model(Fish(kind="salmon", size=10))
+
+
 @pytest.mark.asyncio
 async def test_get_legacy_model(client):
     assert await client.get_legacy_model() == Dinosaur(size=20, kind="t-rex")

packages/http-client-python/tests/mock_api/shared/test_typetest_model_inheritance_single_discriminator.py

@@ -5,7 +5,7 @@
 # --------------------------------------------------------------------------
 import pytest
 from typetest.model.singlediscriminator import SingleDiscriminatorClient
-from typetest.model.singlediscriminator.models import Sparrow, Eagle, Bird, Dinosaur
+from typetest.model.singlediscriminator.models import Sparrow, Eagle, Bird, Dinosaur, Fish
 
 
 @pytest.fixture
@@ -56,5 +56,13 @@ def test_get_wrong_discriminator(client):
     assert client.get_wrong_discriminator() == Bird(wingspan=1, kind="wrongKind")
 
 
+def test_get_no_subtypes_model(client):
+    assert client.get_no_subtypes_model() == Fish(kind="salmon", size=10)
+
+
+def test_put_no_subtypes_model(client):
+    client.put_no_subtypes_model(Fish(kind="salmon", size=10))
+
+
 def test_get_legacy_model(client):
     assert client.get_legacy_model() == Dinosaur(size=20, kind="t-rex")