Disable filterSensitiveLog for event stream

Author: trivikr

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/StructuredMemberWriter.java

@@ -29,6 +29,7 @@
 import software.amazon.smithy.model.shapes.UnionShape;
 import software.amazon.smithy.model.traits.IdempotencyTokenTrait;
 import software.amazon.smithy.model.traits.SensitiveTrait;
+import software.amazon.smithy.model.traits.StreamingTrait;
 
 /**
  * Generates objects, interfaces, enums, etc.
@@ -107,10 +108,13 @@ void writeStructureFilterSensitiveLog(
         if (structureTarget.hasTrait(SensitiveTrait.class)) {
             // member is Sensitive, hide the value.
             writer.write("SENSITIVE_STRING");
-            return;
+        } else if (structureTarget.hasTrait(StreamingTrait.class) && structureTarget.isUnionShape()) {
+            // disable logging for StreamingTrait
+            writer.write("'STREAMING_TRAIT'");
+        } else {
+            // Call filterSensitiveLog on Structure.
+            writer.write("$T.filterSensitiveLog($L)", symbolProvider.toSymbol(structureTarget), structureParam);
         }
-        // Call filterSensitiveLog on Structure.
-        writer.write("$T.filterSensitiveLog($L)", symbolProvider.toSymbol(structureTarget), structureParam);
     }
 
     /**

smithy-typescript-codegen/src/test/java/software/amazon/smithy/typescript/codegen/StructureGeneratorTest.java

@@ -179,6 +179,17 @@ public void callsFilterInUnionWithoutSensitiveData() {
                                 + "  }\n");
     }
 
+    @Test
+    public void filtersStreamingUnion() {
+        testStructureCodegen("test-streaming-union.smithy",
+                                "  export const filterSensitiveLog = (obj: GetFooInput): any => ({\n"
+                                + "    ...obj,\n"
+                                + "    ...(obj.foo && { foo:\n"
+                                + "      'STREAMING_TRAIT'\n"
+                                + "    }),\n"
+                                + "  })\n");
+    }
+
     @Test
     public void filtersSensitiveUnion() {
         testStructureCodegen("test-sensitive-union.smithy",

smithy-typescript-codegen/src/test/resources/software/amazon/smithy/typescript/codegen/test-streaming-union.smithy

@@ -0,0 +1,23 @@
+namespace smithy.example
+
+service Example {
+    version: "1.0.0",
+    operations: [GetFoo]
+}
+
+operation GetFoo {
+    input: GetFooInput
+}
+
+structure GetFooInput {
+    foo: StreamingUnion
+}
+
+@streaming
+union StreamingUnion {
+    message: Message
+}
+
+structure Message {
+    message: String
+}