feat(for-each): improve test

- add check for returned value(s)

js/tests/for-each_test.js

@@ -1,7 +1,7 @@
 Array.prototype.forEach = undefined
 // /*/ // ⚡
 export const tests = []
-const t = (f) => tests.push(f)
+const t = f => tests.push(f)
 
 export const setup = () => {
   const arr = [1, 2, 3, 4, 5, Math.random(), 7, 10, -10, 20, -95]
@@ -12,22 +12,25 @@ export const setup = () => {
 t(({ eq, ctx }) => {
   // callback is call with the item value
   const result = []
-  forEach(ctx.arr, (value) => result.push(value))
-  return eq(result, ctx.arr)
+  const returned = forEach(ctx.arr, value => result.push(value))
+  return eq([returned, result], [undefined, ctx.arr])
 })
 
 t(({ eq, ctx }) => {
   // callback second parameter is the index
   const result = []
-  forEach(ctx.arr, (_, index) => result.push(index))
-  return eq(result, [...ctx.arr.keys()])
+  const returned = forEach(ctx.arr, (_, index) => result.push(index))
+  return eq([returned, result], [undefined, [...ctx.arr.keys()]])
 })
 
 t(({ eq, ctx }) => {
   // callback third parameter is the array
   const result = []
-  forEach(ctx.arr, (_, __, arr) => result.push(arr))
-  return eq(result, Array(ctx.arr.length).fill(ctx.arr))
+  const returned = forEach(ctx.arr, (_, __, arr) => result.push(arr))
+  return eq(
+    [returned, result],
+    [undefined, Array(ctx.arr.length).fill(ctx.arr)],
+  )
 })
 
 Object.freeze(tests)