Don't remove 'val' from case classes' parameters with names (#2634)

* Fix codegen for case classes with field named value

* Add test

zio-http-gen/src/main/scala/zio/http/gen/scala/CodeGen.scala

@@ -69,7 +69,7 @@ object CodeGen {
 
     case Code.CaseClass(name, fields, companionObject) =>
       s"case class $name(\n" +
-        fields.map(render(basePackage)).mkString(",\n").replace("val", "") +
+        fields.map(render(basePackage)).mkString(",\n").replace("val ", " ") +
         "\n)" + companionObject.map(render(basePackage)).map("\n" + _).getOrElse("")
 
     case Code.Enum(name, cases, caseNames, discriminator, noDiscriminator, schema) =>

zio-http-gen/src/test/resources/GeneratedValues.scala

@@ -0,0 +1,13 @@
+package test.component
+
+import zio.schema._
+
+case class Values(
+  value1: Int,
+  value2: String,
+)
+object Values {
+
+  implicit val codec: Schema[Values] = DeriveSchema.gen[Values]
+
+}

zio-http-gen/src/test/scala/zio/http/gen/model/Values.scala

@@ -0,0 +1,8 @@
+package zio.http.gen.model
+
+import zio.schema.{DeriveSchema, Schema}
+
+case class Values(value1: Int, value2: String)
+object Values {
+  implicit val codec: Schema[Values] = DeriveSchema.gen[Values]
+}

zio-http-gen/src/test/scala/zio/http/gen/scala/CodeGenSpec.scala

@@ -200,5 +200,19 @@ object CodeGenSpec extends ZIOSpecDefault {
           "/GeneratedPaymentNoDiscriminator.scala",
         )
       },
+      test("Endpoint with case class with field named 'value'") {
+        val endpoint = Endpoint(Method.POST / "values").out[Values]
+        val openAPI  = OpenAPIGen.fromEndpoints(endpoint)
+        val code     = EndpointGen.fromOpenAPI(openAPI)
+
+        val tempDir = Files.createTempDirectory("codegen")
+        CodeGen.writeFiles(code, java.nio.file.Paths.get(tempDir.toString, "test"), "test", Some(scalaFmtPath))
+
+        fileShouldBe(
+          tempDir,
+          "test/component/Values.scala",
+          "/GeneratedValues.scala",
+        )
+      },
     ) @@ java11OrNewer @@ flaky // Downloading scalafmt on CI is flaky
 }