Add protocol test for httpQueryParams when no other query parameters exist

smithy-aws-protocol-tests/model/restJson1/http-query-params-only.smithy

@@ -0,0 +1,55 @@
+// This file defines test cases that test HTTP query params behavior when no other query parameters exist.
+// See: https://smithy.io/2.0/spec/http-bindings.html#httpqueryparams-trait
+
+$version: "2.0"
+
+namespace aws.protocoltests.restjson
+
+use aws.protocols#restJson1
+use smithy.test#httpRequestTests
+
+/// This example tests httpQueryParams when no other query parameters exist.
+@readonly
+@http(uri: "/http-query-params-only", method: "GET")
+operation HttpQueryParamsOnlyOperation {
+    input: HttpQueryParamsOnlyInput,
+}
+
+apply HttpQueryParamsOnlyOperation @httpRequestTests([
+    {
+        id: "HttpQueryParamsOnlyRequest",
+        documentation: "Test that httpQueryParams are included in request when no other query parameters exist",
+        protocol: restJson1,
+        method: "GET",
+        uri: "/http-query-params-only",
+        queryParams: ["a=b", "c=d"],
+        params: {
+            queryMap: {
+                "a": "b",
+                "c": "d"
+            }
+        },
+        appliesTo: "client",
+    },
+    {
+        id: "HttpQueryParamsOnlyEmptyRequest",
+        documentation: "Test that empty httpQueryParams map results in no query parameters",
+        protocol: restJson1,
+        method: "GET",
+        uri: "/http-query-params-only",
+        params: {
+            queryMap: {}
+        },
+        appliesTo: "client",
+    }
+])
+
+structure HttpQueryParamsOnlyInput {
+    @httpQueryParams
+    queryMap: QueryMap,
+}
+
+map QueryMap {
+    key: String,
+    value: String,
+}

smithy-aws-protocol-tests/model/restJson1/main.smithy

@@ -49,6 +49,7 @@ service RestJson {
         OmitsSerializingEmptyLists,
         QueryIdempotencyTokenAutoFill,
         QueryPrecedence,
+        HttpQueryParamsOnlyOperation,
         QueryParamsAsStringListMap,
 
         // @httpPrefixHeaders tests