@@ -497,9 +497,9 @@ test('spies on a function', () => {
497497return a+ b;
498498 });
499499
500- assert .strictEqual (sum .mock .calls . length ,0 );
500+ assert .strictEqual (sum .mock .callCount () ,0 );
501501assert .strictEqual (sum (3 ,4 ),7 );
502- assert .strictEqual (sum .mock .calls . length ,1 );
502+ assert .strictEqual (sum .mock .callCount () ,1 );
503503
504504const call = sum .mock .calls [0 ];
505505assert .deepStrictEqual (call .arguments , [3 ,4 ]);
@@ -521,9 +521,9 @@ test('spies on a function', () => {
521521return a+ b;
522522 });
523523
524- assert .strictEqual (sum .mock .calls . length ,0 );
524+ assert .strictEqual (sum .mock .callCount () ,0 );
525525assert .strictEqual (sum (3 ,4 ),7 );
526- assert .strictEqual (sum .mock .calls . length ,1 );
526+ assert .strictEqual (sum .mock .callCount () ,1 );
527527
528528const call = sum .mock .calls [0 ];
529529assert .deepStrictEqual (call .arguments , [3 ,4 ]);
@@ -551,9 +551,9 @@ test('spies on an object method', (t) => {
551551 };
552552
553553t .mock .method (number,' add'
554- assert .strictEqual (number .add .mock .calls . length ,0 );
554+ assert .strictEqual (number .add .mock .callCount () ,0 );
555555assert .strictEqual (number .add (3 ),8 );
556- assert .strictEqual (number .add .mock .calls . length ,1 );
556+ assert .strictEqual (number .add .mock .callCount () ,1 );
557557
558558const call = number .add .mock .calls [0 ];
559559
@@ -1854,9 +1854,9 @@ test('spies on an object method', (t) => {
18541854 };
18551855
18561856t .mock .method (number,' subtract'
1857- assert .strictEqual (number .subtract .mock .calls . length ,0 );
1857+ assert .strictEqual (number .subtract .mock .callCount () ,0 );
18581858assert .strictEqual (number .subtract (3 ),2 );
1859- assert .strictEqual (number .subtract .mock .calls . length ,1 );
1859+ assert .strictEqual (number .subtract .mock .callCount () ,1 );
18601860
18611861const call = number .subtract .mock .calls [0 ];
18621862