Added tests for unsupported signing algorithm interceptor

aws-runtime/aws-http/common/test/aws/sdk/kotlin/runtime/http/interceptors/UnsupportedSigningAlgorithmInterceptorTest.kt

@@ -0,0 +1,62 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+package aws.sdk.kotlin.runtime.http.interceptors
+
+import aws.smithy.kotlin.runtime.auth.awssigning.UnsupportedSigningAlgorithm
+import aws.smithy.kotlin.runtime.client.ResponseInterceptorContext
+import aws.smithy.kotlin.runtime.client.SdkClientOption
+import aws.smithy.kotlin.runtime.http.request.HttpRequest
+import aws.smithy.kotlin.runtime.http.response.HttpResponse
+import aws.smithy.kotlin.runtime.operation.ExecutionContext
+import kotlinx.coroutines.test.runTest
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertFails
+
+class UnsupportedSigningAlgorithmInterceptorTest {
+    @Test
+    fun testUnsupportedSigningAlgorithmSigV4a() = runTest {
+        val exception = assertFails {
+            UnsupportedSigningAlgorithmInterceptor()
+                .modifyBeforeCompletion(
+                    context(
+                        Result.failure(
+                            UnsupportedSigningAlgorithm(
+                                "SIGV4A support is not yet implemented for the default signer.",
+                                true,
+                            ),
+                        ),
+                    ),
+                )
+        }
+
+        assertEquals(UnsupportedSigningAlgorithm::class, exception::class)
+        assertEquals("SIGV4A support is not yet implemented for the default signer.", exception.message)
+    }
+
+    @Test
+    fun testUnsupportedSigningAlgorithmNotSigV4aNoException() = runTest {
+        UnsupportedSigningAlgorithmInterceptor()
+            .modifyBeforeCompletion(
+                context(
+                    Result.failure(
+                        UnsupportedSigningAlgorithm(
+                            "SIGV5 support is not yet implemented for the default signer.",
+                            false,
+                        ),
+                    ),
+                ),
+            )
+    }
+}
+
+private fun context(response: Result<Any>) =
+    object : ResponseInterceptorContext<Any, Any, HttpRequest?, HttpResponse?> {
+        override val executionContext = ExecutionContext.build { attributes[SdkClientOption.OperationName] = "test" }
+        override val request = Unit
+        override val response = response
+        override val protocolRequest = HttpRequest { }
+        override val protocolResponse = null
+    }

codegen/aws-sdk-codegen/src/main/kotlin/aws/sdk/kotlin/codegen/customization/s3/ClientConfigIntegration.kt

@@ -54,7 +54,6 @@ class ClientConfigIntegration : KotlinIntegration {
             """.trimIndent()
         }
 
-        // FIXME: default signer doesn't yet implement sigv4a
         val DisableMrapProp: ConfigProperty = ConfigProperty {
             name = "disableMrap"
             useSymbolWithNullableBuilder(KotlinTypes.Boolean, "false")