Fix consistent service naming and add test coverage (#2349)

* Make service name casing consistent

* Add naming-obstacle-course-casing.smithy

* Add missing import

* Relax obstacle course even further

* Better TODO

* Add CHANGELOG.next.toml

Author: hlbarber

CHANGELOG.next.toml

@@ -28,3 +28,9 @@ message = "Adds jitter to `LazyCredentialsCache`. This allows credentials with t
 references = ["smithy-rs#2335"]
 meta = { "breaking" = false, "tada" = false, "bug" = false }
 author = "ysaito1001"
+
+[[smithy-rs]]
+message = "Fix inconsistent casing in services re-export."
+references = ["smithy-rs#2349"]
+meta = { "breaking" = false, "tada" = false, "bug" = true, "target" = "server" }
+author = "hlbarber"

codegen-client-test/build.gradle.kts

@@ -79,6 +79,11 @@ val allCodegenTests = "../codegen-core/common-test-models".let { commonModels ->
             """.trimIndent(),
             imports = listOf("$commonModels/naming-obstacle-course-ops.smithy"),
         ),
+        CodegenTest(
+            "casing#ACRONYMInside_Service",
+            "naming_test_casing",
+            imports = listOf("$commonModels/naming-obstacle-course-casing.smithy"),
+        ),
         CodegenTest(
             "naming_obs_structs#NamingObstacleCourseStructs",
             "naming_test_structs",

codegen-core/common-test-models/naming-obstacle-course-casing.smithy

@@ -0,0 +1,63 @@
+$version: "1.0"
+namespace casing
+
+use aws.protocols#awsJson1_1
+
+// TODO(https://github.com/awslabs/smithy-rs/issues/2340): The commented part of the model breaks the generator in a
+// miriad of ways. Any solution to the linked issue must address this.
+
+/// Confounds model generation machinery with lots of problematic casing
+@awsJson1_1
+service ACRONYMInside_Service {
+    operations: [
+        DoNothing,
+    //    ACRONYMInside_Op
+    //    ACRONYM_InsideOp
+    ]
+}
+
+operation DoNothing {}
+
+// operation ACRONYMInside_Op {
+//     input: Input,
+//     output: Output,
+//     errors: [Error],
+// }
+
+// operation ACRONYM_InsideOp {
+//     input: Input,
+//     output: Output,
+//     errors: [Error],
+// }
+
+// structure Input {
+//     ACRONYMInside_Member: ACRONYMInside_Struct,
+//     ACRONYM_Inside_Member: ACRONYM_InsideStruct,
+//     ACRONYM_InsideMember: ACRONYMInsideStruct
+// }
+
+// structure Output {
+//     ACRONYMInside_Member: ACRONYMInside_Struct,
+//     ACRONYM_Inside_Member: ACRONYM_InsideStruct,
+//     ACRONYM_InsideMember: ACRONYMInsideStruct
+// }
+
+// @error("client")
+// structure Error {
+//     ACRONYMInside_Member: ACRONYMInside_Struct,
+//     ACRONYM_Inside_Member: ACRONYM_InsideStruct,
+//     ACRONYM_InsideMember: ACRONYMInsideStruct
+// }
+
+// structure ACRONYMInside_Struct {
+//     ACRONYMInside_Member: ACRONYM_InsideStruct,
+//     ACRONYM_Inside_Member: Integer,
+// }
+
+// structure ACRONYM_InsideStruct {
+//     ACRONYMInside_Member: Integer,
+// }
+
+// structure ACRONYMInsideStruct {
+//     ACRONYMInside_Member: Integer,
+// }

codegen-server-test/build.gradle.kts

@@ -38,6 +38,7 @@ dependencies {
 val allCodegenTests = "../codegen-core/common-test-models".let { commonModels ->
     listOf(
         CodegenTest("crate#Config", "naming_test_ops", imports = listOf("$commonModels/naming-obstacle-course-ops.smithy")),
+        CodegenTest("casing#ACRONYMInside_Service", "naming_test_casing", imports = listOf("$commonModels/naming-obstacle-course-casing.smithy")),
         CodegenTest(
             "naming_obs_structs#NamingObstacleCourseStructs",
             "naming_test_structs",

codegen-server/src/main/kotlin/software/amazon/smithy/rust/codegen/server/smithy/generators/ServerServiceGenerator.kt

@@ -17,6 +17,7 @@ import software.amazon.smithy.rust.codegen.core.rustlang.rust
 import software.amazon.smithy.rust.codegen.core.rustlang.rustTemplate
 import software.amazon.smithy.rust.codegen.core.smithy.RustCrate
 import software.amazon.smithy.rust.codegen.core.smithy.generators.protocol.ProtocolSupport
+import software.amazon.smithy.rust.codegen.core.util.toPascalCase
 import software.amazon.smithy.rust.codegen.core.util.toSnakeCase
 import software.amazon.smithy.rust.codegen.server.smithy.ServerCargoDependency
 import software.amazon.smithy.rust.codegen.server.smithy.ServerCodegenContext
@@ -42,7 +43,7 @@ open class ServerServiceGenerator(
 ) {
     private val index = TopDownIndex.of(codegenContext.model)
     protected val operations = index.getContainedOperations(codegenContext.serviceShape).sortedBy { it.id }
-    private val serviceName = codegenContext.serviceShape.id.name.toString()
+    private val serviceName = codegenContext.serviceShape.id.name.toPascalCase()
 
     fun documentation(writer: RustWriter) {
         val operations = index.getContainedOperations(codegenContext.serviceShape).toSortedSet(compareBy { it.id })