fix: deserialize whitespace protocol codegen test (#279)

Author: wooj2

codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/restxml/AWSHttpProtocolRestXMLCustomizations.kt

@@ -15,6 +15,8 @@ class AWSHttpProtocolRestXMLCustomizations : AWSHttpProtocolCustomizations() {
         // TODO: Subject to change if Foundation dependency is removed
         requestEncoderOptions["dateEncodingStrategy"] = ".secondsSince1970"
         responseDecoderOptions["dateDecodingStrategy"] = ".secondsSince1970"
+        responseDecoderOptions["trimValueWhitespaces"] = "false"
+        responseDecoderOptions["removeWhitespaceElements"] = "true"
         properties.add(AWSHttpRequestXMLEncoder(requestEncoderOptions))
         properties.add(AWSHttpResponseXMLDecoder(responseDecoderOptions))
         return properties

codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/restxml/RestXmlProtocolGenerator.kt

@@ -63,18 +63,14 @@ class RestXmlProtocolGenerator : AWSHttpBindingProtocolGenerator() {
     }
 
     override fun generateProtocolUnitTests(ctx: ProtocolGenerator.GenerationContext): Int {
-        val ignoredTests = setOf(
-            // FIXME - escaped strings not fully supported in rest xml
-            "SimpleScalarPropertiesComplexEscapes"
-        )
         return HttpProtocolTestGenerator(
             ctx,
             requestTestBuilder,
             responseTestBuilder,
             errorTestBuilder,
             httpProtocolCustomizable,
             serdeContext,
-            ignoredTests
+            setOf()
         ).generateProtocolTests()
     }
 }