Update for_each_pair.test.ts

Author: Mqxx

src/array/for_each_pair.test.ts

@@ -6,20 +6,15 @@ import {
 import forEachPair from "./for_each_pair.ts";
 
 Deno.test(
-  'Remove duplicates from array.',
+  'Call function for each pair.',
   async (test) => {
     await test.step({
       name: 'Empty array',
       fn: () => {
         function dummyFunction(
           previousValue : number,
           currentValue : number
-        ) : {
-          previousValue : number,
-          currentValue : number
-        } { return {
-          previousValue, currentValue
-        }}
+        ) : void {}
 
         const dummyFunctionSpy = spy(dummyFunction);
 
@@ -32,31 +27,19 @@ Deno.test(
           args: [
             0,
             2
-          ],
-          returned: {
-            currentValue: 0,
-            previousValue: 2
-          }
+          ]
         })
         assertSpyCall(dummyFunctionSpy, 1, {
           args: [
             2,
             3
-          ],
-          returned: {
-            currentValue: 2,
-            previousValue: 3
-          }
+          ]
         })
         assertSpyCall(dummyFunctionSpy, 2, {
           args: [
             3,
             7
-          ],
-          returned: {
-            currentValue: 3,
-            previousValue: 7
-          }
+          ]
         })
 
         assertSpyCalls(dummyFunctionSpy, 3);