fix(sdk): MutJson methods .set(), .setAt() accept any, not `M…

…utJson` (#2901)

Changed `MutJson` methods `.set()`, `.setAt()` to accept `MutJson`  and not
Fixes issue #2767  

## Checklist

- [ ] Title matches [Winglang's style guide](https://docs.winglang.io/contributors/pull_requests#how-are-pull-request-titles-formatted)
- [ ] Description explains motivation and solution
- [ ] Tests added (always)
- [ ] Docs updated (only required for features)
- [ ] Added `pr/e2e-full` label if this feature requires end-to-end testing

*By submitting this pull request, I confirm that my contribution is made under the terms of the [Monada Contribution License](https://docs.winglang.io/terms-and-policies/contribution-license.html)*.

docs/04-standard-library/04-api-reference.md

@@ -4530,7 +4530,7 @@ The index of the element in the MutJson Array to return.
 ##### `set` <a name="set" id="@winglang/sdk.std.MutJson.set"></a>
 
 ```wing
-set(key: str, value: any): void
+set(key: str, value: MutJson): void
 ```
 
 Adds or updates an element in MutJson with a specific key and value.
@@ -4545,7 +4545,7 @@ The key of the element to add.
 
 ###### `value`<sup>Required</sup> <a name="value" id="@winglang/sdk.std.MutJson.set.parameter.value"></a>
 
-- *Type:* any
+- *Type:* <a href="#@winglang/sdk.std.MutJson">MutJson</a>
 
 The value of the element to add.
 
@@ -4554,7 +4554,7 @@ The value of the element to add.
 ##### `setAt` <a name="setAt" id="@winglang/sdk.std.MutJson.setAt"></a>
 
 ```wing
-setAt(index: num, value: any): void
+setAt(index: num, value: MutJson): void
 ```
 
 Set element in MutJson Array with a specific key and value.
@@ -4567,7 +4567,7 @@ Set element in MutJson Array with a specific key and value.
 
 ###### `value`<sup>Required</sup> <a name="value" id="@winglang/sdk.std.MutJson.setAt.parameter.value"></a>
 
-- *Type:* any
+- *Type:* <a href="#@winglang/sdk.std.MutJson">MutJson</a>
 
 The value of the element to set.
 

examples/tests/sdk_tests/std/json.w

@@ -1,2 +1,50 @@
 //-----------------------------------------------------------------------------
-// TODO: https://github.com/winglang/wing/issues/2785
+// TODO: https://github.com/winglang/wing/issues/2785
+//-----------------------------------------------------------------------------
+bring cloud;
+
+// set() & get()
+let a = MutJson { a: 1 };
+let b = MutJson { b: 2 };
+a.set("c", b);
+
+let c = a.get("c");
+assert(c.get("b") == 2);
+
+test "set()" {
+  let x = MutJson { a: 1 };
+  x.set("b", 2);
+  let y = x.get("b"); 
+  assert(y == 2);
+}
+
+//-----------------------------------------------------------------------------
+// setAt() & getAt()
+let d = MutJson { d: 3 };
+a.setAt(2, d);
+let e = a.getAt(2);
+assert(e.get("d") == 3);
+
+test "setAt()" {
+  let x = MutJson { a: 1 };
+  let a = MutJson { c: 3 };
+  x.setAt(2, a);
+  let d = x.getAt(2);
+  assert(d.get("c") == 3);
+}
+
+/*
+Will add test later:
+test "setWithNonMutJsonObject()" {
+let var error = "";
+try {
+    let f = MutJson { e: 4 };
+    f.set("f", 9);
+ } catch e {
+     error = e;
+ }
+
+ log(error);
+ assert(error == "");
+}
+*/

libs/wingsdk/src/std/json.ts

@@ -206,7 +206,7 @@ export class MutJson {
    * @param key The key of the element to add
    * @param value The value of the element to add
    */
-  public set(key: string, value: any): void {
+  public set(key: string, value: MutJson): void {
     key;
     value;
     throw new Error("Macro");
@@ -219,7 +219,7 @@ export class MutJson {
    *
    * @param value The value of the element to set
    */
-  public setAt(index: number, value: any): void {
+  public setAt(index: number, value: MutJson): void {
     index;
     value;
     throw new Error("Macro");