fix debounce

1-js/06-advanced-functions/09-call-apply-decorators/03-debounce/_js.view/test.js

@@ -1,48 +1,47 @@
-describe("debounce", function() {
+describe('debounce', function () {
-  before(function() {
+  before(function () {
     this.clock = sinon.useFakeTimers();
   });
 
-  after(function() {
+  after(function () {
     this.clock.restore();
   });
 
-  it("for one call - runs it after given ms", function () {
+  it('for one call - runs it after given ms', function () {
     const f = sinon.spy();
     const debounced = debounce(f, 1000);
 
-    debounced("test");
+    debounced('test');
-    assert(f.notCalled);
+    assert(f.notCalled, 'not called immediately');
     this.clock.tick(1000);
-    assert(f.calledOnceWith("test"));
+    assert(f.calledOnceWith('test'), 'called after 1000ms');
   });
 
-  it("for 3 calls - runs the last one after given ms", function() {
+  it('for 3 calls - runs the last one after given ms', function () {
     const f = sinon.spy();
     const debounced = debounce(f, 1000);
 
-    f("a")
+    debounced('a');
-    setTimeout(() => f("b"), 200);  // ignored (too early)
+    setTimeout(() => debounced('b'), 200); // ignored (too early)
-    setTimeout(() => f("c"), 500); // runs (1000 ms passed)
+    setTimeout(() => debounced('c'), 500); // runs (1000 ms passed)
     this.clock.tick(1000);
 
-    assert(f.notCalled);
+    assert(f.notCalled, 'not called after 1000ms');
 
     this.clock.tick(500);
 
-    assert(f.calledOnceWith('c'));
+    assert(f.calledOnceWith('c'), 'called after 1500ms');
   });
 
-  it("keeps the context of the call", function() {
+  it('keeps the context of the call', function () {
     let obj = {
       f() {
         assert.equal(this, obj);
-      }
+      },
     };
 
     obj.f = debounce(obj.f, 1000);
-    obj.f("test");
+    obj.f('test');
     this.clock.tick(5000);
   });
-
 });