add tests to assert that code outside com.dwolla.config doesn't have …

…access to the generated code

build.sbt

@@ -1,3 +1,5 @@
+import org.typelevel.sbt.gha.WorkflowStep.Sbt
+
 ThisBuild / organization := "com.dwolla"
 ThisBuild / description := "Adds support for decrypting values in TypeSafe Config files"
 ThisBuild / homepage := Some(url("https://github.com/Dwolla/scala-secure-config"))
@@ -58,6 +60,7 @@ lazy val `secure-config` = (project in file("."))
         "com.disneystreaming.smithy4s" %% "smithy4s-http4s" % smithy4sVersion.value,
         "com.disneystreaming.smithy4s" %% "smithy4s-aws-http4s" % smithy4sVersion.value,
         "org.typelevel" %% "mouse" % "1.3.1",
+        "org.scalameta" %% "munit" % "1.0.2" % Test,
       )
     },
     smithy4sAwsSpecs ++= Seq(AWS.kms),

src/test/scala-2/bincompat/ShadedGeneratedSmithySpec.scala

@@ -0,0 +1,21 @@
+package bincompat
+
+import munit.*
+
+class ShadedGeneratedSmithySpec extends FunSuite {
+  test("we don't have access to the generated KMS objects in their original package") {
+    assertNoDiff(compileErrors("""com.amazonaws.kms.KMS.id == smithy4s.ShapeId("com.amazonaws.kms", "TrentService")"""),
+      """error: object amazonaws is not a member of package com
+        |com.amazonaws.kms.KMS.id == smithy4s.ShapeId("com.amazonaws.kms", "TrentService")
+        |    ^
+        |""".stripMargin)
+  }
+
+  test("we don't have access to the generated KMS objects in the shaded package") {
+    assertNoDiff(compileErrors("""assertEquals(com.dwolla.config.smithy_shaded.com.amazonaws.kms.KMS.id, smithy4s.ShapeId("com.dwolla.config.smithy_shaded.com.amazonaws.kms", "TrentService"))"""),
+      """error: value KMS in package kms cannot be accessed as a member of object com.dwolla.config.smithy_shaded.com.amazonaws.kms.package from class ShadedGeneratedSmithySpec in package bincompat
+        |assertEquals(com.dwolla.config.smithy_shaded.com.amazonaws.kms.KMS.id, smithy4s.ShapeId("com.dwolla.config.smithy_shaded.com.amazonaws.kms", "TrentService"))
+        |                                                               ^
+        |""".stripMargin)
+  }
+}

src/test/scala-3/bincompat/ShadedGeneratedSmithySpec.scala

@@ -0,0 +1,31 @@
+package bincompat
+
+import munit.*
+
+class ShadedGeneratedSmithySpec extends FunSuite {
+  test("we don't have access to the generated KMS objects in their original package") {
+    assertNoDiff(compileErrors("""com.amazonaws.kms.KMS.id == smithy4s.ShapeId("com.amazonaws.kms", "TrentService")"""),
+      """error:
+        |value amazonaws is not a member of com, but could be made available as an extension method.
+        |
+        |The following import might make progress towards fixing the problem:
+        |
+        |  import munit.Clue.generate
+        |
+        |com.amazonaws.kms.KMS.id == smithy4s.ShapeId("com.amazonaws.kms", "TrentService")
+        |   ^
+        |""".stripMargin)
+  }
+
+  test("we don't have access to the generated KMS objects in the shaded package") {
+    assertNoDiff(compileErrors("""assertEquals(com.dwolla.config.smithy_shaded.com.amazonaws.kms.KMS.id, smithy4s.ShapeId("com.dwolla.config.smithy_shaded.com.amazonaws.kms", "TrentService"))"""),
+      """error:
+        |value KMS in package com.dwolla.config.smithy_shaded.com².amazonaws.kms cannot be accessed as a member of com.dwolla.config.smithy_shaded.com².amazonaws.kms.type from class ShadedGeneratedSmithySpec.
+        |
+        |where:    com  is a package
+        |          com² is a package in package com.dwolla.config.smithy_shaded
+        |assertEquals(com.dwolla.config.smithy_shaded.com.amazonaws.kms.KMS.id, smithy4s.ShapeId("com.dwolla.config.smithy_shaded.com.amazonaws.kms", "TrentService"))
+        |                                                              ^
+        |""".stripMargin)
+  }
+}