HandleCreateSuccessfully creates an HTTP handler at `/stacks` on the test handler mux that responds with a `Create` response.

HandleDeleteSuccessfully creates an HTTP handler at `/stacks/postman_stack/16ef0584-4458-41eb-87c8-0dc8d5f66c87` on the test handler mux that responds with a `Delete` response.

HandleGetSuccessfully creates an HTTP handler at `/stacks/postman_stack/16ef0584-4458-41eb-87c8-0dc8d5f66c87` on the test handler mux that responds with a `Get` response.

HandleListSuccessfully creates an HTTP handler at `/stacks` on the test handler mux that responds with a `List` response.

HandleUpdateSuccessfully creates an HTTP handler at `/stacks/postman_stack/16ef0584-4458-41eb-87c8-0dc8d5f66c87` on the test handler mux that responds with an `Update` response.

CreateOutput represents the response body from a Create request.

FullListOutput represents the response body from a List request without a marker.

GetOutput represents the response body from a Get request.

CreateExpected represents the expected object from a Create request.

GetExpected represents the expected object from a Get request.

ListExpected represents the expected object from a List request.