Add test for MultiSelect List in OperationContextParams

Author: trivikr

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

@@ -44,6 +44,7 @@ public void writesOperationContextParamValues() {
                 "opContextParamWildcardExpressionList: { type: \"operationContextParams\", get: (input?: any) => input?.fooList }",
                 "opContextParamWildcardExpressionListObj: { type: \"operationContextParams\", get: (input?: any) => input?.fooListObj?.map((obj: any) => obj?.key) }",
                 "opContextParamWildcardExpressionHash: { type: \"operationContextParams\", get: (input?: any) => Object.values(input?.fooObjObj ?? {}).map((obj: any) => obj?.bar) }",
+                "opContextParamMultiSelectList: { type: \"operationContextParams\", get: (input?: any) => input?.fooListObjObj?.map((obj: any) => [obj?.baz?.bar, obj?.qux].filter((i) => i)) }",
                 "opContextParamKeys: { type: \"operationContextParams\", get: (input?: any) => Object.keys(input?.fooKeys ?? {}) }",
             }
         );

smithy-typescript-codegen/src/test/resources/software/amazon/smithy/typescript/codegen/endpointsV2/endpoints-operation-context-params.smithy

@@ -20,6 +20,9 @@ namespace smithy.example
         opContextParamWildcardExpressionHash: {
             type: "stringArray",
         },
+        opContextParamMultiSelectList: {
+            type: "stringArray",
+        },
         opContextParamKeys: {
             type: "stringArray",
         },
@@ -37,6 +40,7 @@ service Example {
     "opContextParamWildcardExpressionList": { path: "fooList[*]" }
     "opContextParamWildcardExpressionListObj": { path: "fooListObj[*].key" }
     "opContextParamWildcardExpressionHash": { path: "fooObjObj.*.bar" }
+    "opContextParamMultiSelectList": { path: "fooListObjObj[*].[baz.bar, qux]" }
     "opContextParamKeys": { path: "keys(fooKeys)" }
 )
 operation GetFoo {
@@ -49,6 +53,7 @@ structure GetFooInput {
     fooKeys: FooObject,
     fooList: FooList,
     fooListObj: FooListObject,
+    fooListObjObj: FooListObjectObject,
     fooObj: FooObject,
     fooObjObj: FooObjectObject,
     fooString: String,
@@ -58,6 +63,15 @@ structure FooObject {
     bar: String
 }
 
+list FooListObjectObject {
+    member: FooMultiSelectObjectObject
+}
+
+structure FooMultiSelectObjectObject {
+    baz: FooObject
+    qux: String
+}
+
 structure FooObjectObject {
     baz: FooObject
 }