title: Using Jest expected mock function to have been called one time, but it was called zero times
body: <p>I am new to the Jest testing framework and so I wan't too mock a function that returns a Promise to test my click event button. I am receiving an error that says my method has not been called but I have it defined below as a jest.fn() and expect it to be called once. Any help in solving this or some clarity on why my code is wrong.</p>
  
  <pre><code>const props = {
          activitiesStore: {
            isFirst:false,
            isLast:false,
            isLaunching:false,
            isLoaded:false,
            currentActivityIndex:115,
            markLessonFinished:() =&gt; {
  
            },
            setContent:{
              description: "In the CompTIA A+ training course, you will learn the fundamentals of computer technology, repair, basic networking, installation and configuration of PCs, laptops and related hardware, as well as configurations for the mobile OS's Android and Apple iOS."
            },
            activityRespone:{
              description:"**TCP/IP Configuration Default Gateway** For this lesson, we take a closer more intimate look at the Default Gateway and how that process works. This is where the computer goes to get out of a network…",
              lesson_id:116,
              no_iframe:false,
              slug:"tcpip-configurations-default-gateway",
              type:"Video Activity",
              url:"https://player.vimeo.com/video/113658225"
            },
            activities:[{
              completed:true,
              content_description_id:2,
              course_id:178,
              moduleId:4649,
              thumbnail:"https://dev.cybrary.it/wp-content/themes/cybrary/teamsv2/img/certification_labs.png",
              title:"About Anthony Harris"
            }],
            advertisements:[{
              href:"https://www.cybrary.it",
              image:"https://www.cybrary.it/wp-content/uploads/2018/12/VideoPage-XMAS40.png",
              objectID:"787592",
              section:"immersive",
              weight:0
            }],
            currentActivity:{
              completed:true,
              content_description_id:117,
              course_id:178,
              moduleId:4665,
              thumbnail:"https://dev.cybrary.it/wp-content/themes/cybrary/teamsv2/img/certification_labs.png",
              title:"TCP/IP Configurations Default Gateway",
              currentActivityIndex:115
            },
            enrollment:{
              estimatedCompletionDate: "Aug 21, 2019",
              estimatedTimeRemaining: "31 hours 38 minutes",
              id: 37,
              isLate: true,
              overallProgress: 33,
              programDeadline: "May 17, 2018",
              status: "Started",
              thumbnail: "/images/assignment_16.jpg",
              title: "testing admin curry",
              totalCompletedCurriculumItems: 0,
              totalCurriculumItems: 1,
              totalStartedCurriculumItems: 1,
              type: "Assignment",
              settings:[{
  
              }],
              progressData:[{
                progress: 100,
                title: "Session 1",
                duration:null,
                checkpointDate: "Sep 30, 2018",
                content:[{
                  content:{
                    duration: " 1 minute",
                    status: "Completed",
                    title: "Instructor Background - About Anthony Harris"
                  },
                  icon:"play"
                }],
                headerColumns:[{
                  title: "Progress",
                  value: "100%"
                }],
                headerRow:[{
                  content:"LAUNCH"
                }]
              }],
              moduleActivities:[[{
                duration: 110,
                id: 2,
                progress: 100,
                title: "About Anthony Harris",
                _course_id: 178,
                _formatted_title: "Instructor Background - About Anthony Harris",
                _is_completed: true
              }]],
              enrollmentTableData:[{
                duration: "44 hours 16 minutes",
                estimatedTimeRemaining: "31 hours 38 minutes",
                progress: 33,
                remainingDuration: "31 hours 38 minutes",
                status: "In Progress",
                thumbnail: "https://dev.cybrary.it/wp-content/themes/cybrary/teamsv2/img/certification_labs.png",
                title: "Comptia A+ (Archive)",
                type: "Course",
                curriculumItem:{
                  legacy_id: 167,
                  video_intro_url: "https://player.vimeo.com/video/208046939",
                  id:178,
                  content_description_id:4648,
                  content_description:{
                    courseId: 178,
                    duration_seconds: 154800,
                    id: 4648,
                    is_hidden: 1,
                    content_type:{
                      human_readable_name: "Course",
                      id: 1,
                      name: "course",
                      thumbnail_url: "https://dev.cybrary.it/wp-content/themes/cybrary/teamsv2/img/certification_labs.png"
                    }
                  }
                },
                contentDescription:{
                  courseId: 178,
                  duration_seconds: 154800,
                  id: 4648,
                  is_hidden: 1,
                  content_type:{
                    human_readable_name: "Course",
                    id: 1,
                    name: "course",
                    thumbnail_url: "https://dev.cybrary.it/wp-content/themes/cybrary/teamsv2/img/certification_labs.png"
                  }
                }
              }],
              curriculumItems:[{
                duration: "44 hours 16 minutes",
                estimatedTimeRemaining: "31 hours 38 minutes",
                progress: 33,
                remainingDuration: "31 hours 38 minutes",
                status: "In Progress",
                thumbnail: "https://dev.cybrary.it/wp-content/themes/cybrary/teamsv2/img/certification_labs.png",
                title: "Comptia A+ (Archive)",
                type: "Course",
                curriculumItem:{
                  legacy_id: 167,
                  video_intro_url: "https://player.vimeo.com/video/208046939",
                  id:178,
                  content_description_id:4648,
                  content_description:{
                    courseId: 178,
                    duration_seconds: 154800,
                    id: 4648,
                    is_hidden: 1,
                    content_type:{
                      human_readable_name: "Course",
                      id: 1,
                      name: "course",
                      thumbnail_url: "https://dev.cybrary.it/wp-content/themes/cybrary/teamsv2/img/certification_labs.png"
                    }
                  }
                },
                contentDescription:{
                  courseId: 178,
                  duration_seconds: 154800,
                  id: 4648,
                  is_hidden: 1,
                  content_type:{
                    human_readable_name: "Course",
                    id: 1,
                    name: "course",
                    thumbnail_url: "https://dev.cybrary.it/wp-content/themes/cybrary/teamsv2/img/certification_labs.png"
                  }
                }
              }],
              loading:{
  
              }
            }
          }
  </code></pre>
  
  <pre><code>markLessonFinished() {
      const currentActivity = this.currentActivity;
      return new Promise(resolve =&gt; {
        if (
          this.activityResponse &amp;&amp;
          this.activityResponse.lesson_id &amp;&amp;
          currentActivity.course_id
        ) {
          Agents.catalog
            .finishLesson(
              this.activityResponse.lesson_id,
              currentActivity.course_id
            )
            .then(() =&gt; {
              resolve(true);
            });
        }
        resolve(false);
      });
    }
  </code></pre>
  
  <pre><code>it("should click next button after lesson finished", async () =&gt; {
  
          const { getByText } = render(&lt;ImmersivePage {...props}/&gt;)
  
          // checks if 'Next' button is rendered
          expect(getByText("Next")).toBeTruthy()
  
          const markLessonFinished = jest.fn()
  
          await waitForElement(() =&gt; {
              expect(markLessonFinished).toHaveBeenCalledTimes(1)
          }).then(() =&gt; {
              fireEvent.click(getByText("Next"))
          })
      })
  </code></pre>