Re-introduce default generic for server service struct

            ///

            /// See the [root](crate) documentation for more information.

            ##[derive(Clone)]

            pub struct $serviceName<S> {

            pub struct $serviceName<

                S = #{SmithyHttpServer}::routing::RoutingService<

                    #{Router}<

                        #{SmithyHttpServer}::routing::Route<

                            #{SmithyHttpServer}::body::BoxBody

                        >,

                    >,

                    #{Protocol},

                >

            > {

                // This is the router wrapped by layers.

                svc: S,

            }

/*

 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.

 * SPDX-License-Identifier: Apache-2.0

 */

package software.amazon.smithy.rust.codegen.server.smithy.generators

import org.junit.jupiter.api.Test

import software.amazon.smithy.rust.codegen.core.rustlang.rust

import software.amazon.smithy.rust.codegen.core.testutil.asSmithyModel

import software.amazon.smithy.rust.codegen.core.testutil.testModule

import software.amazon.smithy.rust.codegen.server.smithy.testutil.serverIntegrationTest

import java.io.File

internal class ServerServiceGeneratorTest {

    /**

     * See <https://github.com/smithy-lang/smithy-rs/issues/3177>.

     */

    @Test

    fun `one should be able to return a built service from a function`() {

        val model = File("../codegen-core/common-test-models/simple.smithy").readText().asSmithyModel()

        serverIntegrationTest(model) { _, rustCrate ->

            rustCrate.testModule {

                // No actual tests: we just want to check that this compiles.

                rust(

                    """

                    fn _build_service() -> crate::SimpleService {

                        let config = crate::SimpleServiceConfig::builder().build();

                        let service = crate::SimpleService::builder(config).build_unchecked();

                        service.boxed()

                    }

                    """,

                )

            }

        }

    }

}