[python-fastapi] return 500 if not implemented, added some unittests (#19196)

* [python-fastapi] Added some tests for FastAPI generator

1. Checks the generation of the implementation package.
2. Checks if the endpoints with and without descriptions generate correct
   output.

Signed-off-by: Nikita Vakula <programmistov.programmist@gmail.com>

* [python-fastapi] Raise 500 if there is no implementation

Signed-off-by: Nikita Vakula <programmistov.programmist@gmail.com>

---------

Signed-off-by: Nikita Vakula <programmistov.programmist@gmail.com>

modules/openapi-generator/src/main/resources/python-fastapi/api.mustache

@@ -14,6 +14,7 @@ from fastapi import (  # noqa: F401
     Depends,
     Form,
     Header,
+    HTTPException,
     Path,
     Query,
     Response,
@@ -65,7 +66,9 @@ async def {{operationId}}(
     {{/hasAuthMethods}}
 ) -> {{returnType}}{{^returnType}}None{{/returnType}}:
     {{#notes}}"""{{.}}"""
-    {{/notes}}return await Base{{classname}}.subclasses[0]().{{operationId}}({{#allParams}}{{>impl_argument}}{{^-last}}, {{/-last}}{{/allParams}})
+    {{/notes}}if not Base{{classname}}.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
+    return await Base{{classname}}.subclasses[0]().{{operationId}}({{#allParams}}{{>impl_argument}}{{^-last}}, {{/-last}}{{/allParams}})
 {{^-last}}
 
 

modules/openapi-generator/src/test/java/org/openapitools/codegen/python/PythonFastapiCodegenTest.java

@@ -0,0 +1,56 @@
+package org.openapitools.codegen.python;
+
+import org.openapitools.codegen.DefaultGenerator;
+import org.openapitools.codegen.TestUtils;
+import org.openapitools.codegen.config.CodegenConfigurator;
+import org.testng.annotations.Test;
+import org.openapitools.codegen.CodegenConstants;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.List;
+
+public class PythonFastapiCodegenTest {
+    @Test
+    public void testAdditionalPropertiesPutForConfigValues() throws Exception {
+        File output = Files.createTempDirectory("test").toFile();
+        output.deleteOnExit();
+
+        final String IMPL_PKG = "impl_package";
+        final CodegenConfigurator configurator = new CodegenConfigurator()
+                .setGeneratorName("python-fastapi")
+                .setPackageName("nodesc")
+                .setOutputDir(output.getAbsolutePath().replace("\\", "/"))
+                .setInputSpec("src/test/resources/3_1/nodesc.yaml")
+                .addAdditionalProperty(CodegenConstants.FASTAPI_IMPLEMENTATION_PACKAGE, IMPL_PKG);
+
+        DefaultGenerator generator = new DefaultGenerator();
+        List<File> files = generator.opts(configurator.toClientOptInput()).generate();
+        files.forEach(File::deleteOnExit);
+
+        TestUtils.assertFileExists(Paths.get(output.getAbsolutePath(), "/src", IMPL_PKG, "__init__.py"));
+    }
+
+    @Test
+    public void testEndpointSpecsWithoutDescription() throws IOException {
+        File output = Files.createTempDirectory("test").toFile();
+        output.deleteOnExit();
+
+        final CodegenConfigurator configurator = new CodegenConfigurator()
+                .setGeneratorName("python-fastapi")
+                .setPackageName("nodesc")
+                .setOutputDir(output.getAbsolutePath().replace("\\", "/"))
+                .setInputSpec("src/test/resources/3_1/nodesc.yaml");
+
+        DefaultGenerator generator = new DefaultGenerator();
+        List<File> files = generator.opts(configurator.toClientOptInput()).generate();
+        files.forEach(File::deleteOnExit);
+
+        TestUtils.assertFileContains(Paths.get(output + "/src/nodesc/apis/nodesc_api.py"),
+                "return await BaseNodescApi.subclasses[0]().nodesc()\n");
+        TestUtils.assertFileContains(Paths.get(output + "/src/nodesc/apis/desc_api.py"),
+                "return await BaseDescApi.subclasses[0]().desc()\n");
+    }
+}

modules/openapi-generator/src/test/resources/3_1/nodesc.yaml

@@ -0,0 +1,35 @@
+openapi: 3.1.0
+info:
+  description: >-
+    Yet another example.
+  version: 1.0.0
+  title: OpenAPI example
+tags:
+  - name: nodesc
+    description: Endpoints have no description
+  - name: desc
+    description: Endpoints have description
+paths:
+  /nodesc:
+    post:
+      tags:
+        - nodesc
+      summary: dummy operation
+      operationId: nodesc
+      responses:
+        '200':
+          description: successful operation
+        '405':
+          description: Invalid input
+  /desc:
+    post:
+      tags:
+        - desc
+      summary: dummy operation
+      description: 'Description'
+      operationId: desc
+      responses:
+        '200':
+          description: successful operation
+        '405':
+          description: Invalid input

samples/server/petstore/python-fastapi/src/openapi_server/apis/fake_api.py

@@ -14,6 +14,7 @@ from fastapi import (  # noqa: F401
     Depends,
     Form,
     Header,
+    HTTPException,
     Path,
     Query,
     Response,
@@ -46,4 +47,6 @@ async def fake_query_param_default(
     no_default: str = Query(None, description="no default value", alias="noDefault"),
 ) -> None:
     """"""
+    if not BaseFakeApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BaseFakeApi.subclasses[0]().fake_query_param_default(has_default, no_default)

samples/server/petstore/python-fastapi/src/openapi_server/apis/pet_api.py

@@ -14,6 +14,7 @@ from fastapi import (  # noqa: F401
     Depends,
     Form,
     Header,
+    HTTPException,
     Path,
     Query,
     Response,
@@ -50,6 +51,8 @@ async def add_pet(
     ),
 ) -> Pet:
     """"""
+    if not BasePetApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BasePetApi.subclasses[0]().add_pet(pet)
 
 
@@ -70,6 +73,8 @@ async def delete_pet(
     ),
 ) -> None:
     """"""
+    if not BasePetApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BasePetApi.subclasses[0]().delete_pet(petId, api_key)
 
 
@@ -90,6 +95,8 @@ async def find_pets_by_status(
     ),
 ) -> List[Pet]:
     """Multiple status values can be provided with comma separated strings"""
+    if not BasePetApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BasePetApi.subclasses[0]().find_pets_by_status(status)
 
 
@@ -110,6 +117,8 @@ async def find_pets_by_tags(
     ),
 ) -> List[Pet]:
     """Multiple tags can be provided with comma separated strings. Use tag1, tag2, tag3 for testing."""
+    if not BasePetApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BasePetApi.subclasses[0]().find_pets_by_tags(tags)
 
 
@@ -131,6 +140,8 @@ async def get_pet_by_id(
     ),
 ) -> Pet:
     """Returns a single pet"""
+    if not BasePetApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BasePetApi.subclasses[0]().get_pet_by_id(petId)
 
 
@@ -153,6 +164,8 @@ async def update_pet(
     ),
 ) -> Pet:
     """"""
+    if not BasePetApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BasePetApi.subclasses[0]().update_pet(pet)
 
 
@@ -174,6 +187,8 @@ async def update_pet_with_form(
     ),
 ) -> None:
     """"""
+    if not BasePetApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BasePetApi.subclasses[0]().update_pet_with_form(petId, name, status)
 
 
@@ -195,4 +210,6 @@ async def upload_file(
     ),
 ) -> ApiResponse:
     """"""
+    if not BasePetApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BasePetApi.subclasses[0]().upload_file(petId, additional_metadata, file)

samples/server/petstore/python-fastapi/src/openapi_server/apis/store_api.py

@@ -14,6 +14,7 @@ from fastapi import (  # noqa: F401
     Depends,
     Form,
     Header,
+    HTTPException,
     Path,
     Query,
     Response,
@@ -46,6 +47,8 @@ async def delete_order(
     orderId: str = Path(..., description="ID of the order that needs to be deleted"),
 ) -> None:
     """For valid response try integer IDs with value < 1000. Anything above 1000 or nonintegers will generate API errors"""
+    if not BaseStoreApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BaseStoreApi.subclasses[0]().delete_order(orderId)
 
 
@@ -64,6 +67,8 @@ async def get_inventory(
     ),
 ) -> Dict[str, int]:
     """Returns a map of status codes to quantities"""
+    if not BaseStoreApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BaseStoreApi.subclasses[0]().get_inventory()
 
 
@@ -82,6 +87,8 @@ async def get_order_by_id(
     orderId: int = Path(..., description="ID of pet that needs to be fetched", ge=1, le=5),
 ) -> Order:
     """For valid response try integer IDs with value <= 5 or > 10. Other values will generate exceptions"""
+    if not BaseStoreApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BaseStoreApi.subclasses[0]().get_order_by_id(orderId)
 
 
@@ -99,4 +106,6 @@ async def place_order(
     order: Order = Body(None, description="order placed for purchasing the pet"),
 ) -> Order:
     """"""
+    if not BaseStoreApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BaseStoreApi.subclasses[0]().place_order(order)

samples/server/petstore/python-fastapi/src/openapi_server/apis/user_api.py

@@ -14,6 +14,7 @@ from fastapi import (  # noqa: F401
     Depends,
     Form,
     Header,
+    HTTPException,
     Path,
     Query,
     Response,
@@ -48,6 +49,8 @@ async def create_user(
     ),
 ) -> None:
     """This can only be done by the logged in user."""
+    if not BaseUserApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BaseUserApi.subclasses[0]().create_user(user)
 
 
@@ -67,6 +70,8 @@ async def create_users_with_array_input(
     ),
 ) -> None:
     """"""
+    if not BaseUserApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BaseUserApi.subclasses[0]().create_users_with_array_input(user)
 
 
@@ -86,6 +91,8 @@ async def create_users_with_list_input(
     ),
 ) -> None:
     """"""
+    if not BaseUserApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BaseUserApi.subclasses[0]().create_users_with_list_input(user)
 
 
@@ -106,6 +113,8 @@ async def delete_user(
     ),
 ) -> None:
     """This can only be done by the logged in user."""
+    if not BaseUserApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BaseUserApi.subclasses[0]().delete_user(username)
 
 
@@ -124,6 +133,8 @@ async def get_user_by_name(
     username: str = Path(..., description="The name that needs to be fetched. Use user1 for testing."),
 ) -> User:
     """"""
+    if not BaseUserApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BaseUserApi.subclasses[0]().get_user_by_name(username)
 
 
@@ -142,6 +153,8 @@ async def login_user(
     password: str = Query(None, description="The password for login in clear text", alias="password"),
 ) -> str:
     """"""
+    if not BaseUserApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BaseUserApi.subclasses[0]().login_user(username, password)
 
 
@@ -160,6 +173,8 @@ async def logout_user(
     ),
 ) -> None:
     """"""
+    if not BaseUserApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BaseUserApi.subclasses[0]().logout_user()
 
 
@@ -181,4 +196,6 @@ async def update_user(
     ),
 ) -> None:
     """This can only be done by the logged in user."""
+    if not BaseUserApi.subclasses:
+        raise HTTPException(status_code=500, detail="Not implemented")
     return await BaseUserApi.subclasses[0]().update_user(username, user)