To replace the functionality of the MessageBox with a LogMessage during mock testing, the developer can perform the action of Surround activity with mock. This action inserts a mock activity around the selected activity, which allows the developer to change the behavior of the activity for testing purposes. For example, the developer can right-click on the MessageBox activity and select Surround activity with mock from the dropdown menu. This will create a mock activity that contains the MessageBox activity. The developer can then edit the mock activity and replace the MessageBox activity with a LogMessage activity, which will write the message to the output panel instead of displaying it in a dialog box. This way, the developer can test the functionality of the workflow without having to interact with the MessageBox dialog box. References: [Mock Testing], [Surround Activity with Mock]

The value that will be displayed in the Output Panel at the end of the sequence is 9. This is because the code in the Invoke Code activity is looping through the array in_numArray and setting the variable out_numVar to the highest value in the array. The array in_numArray has the values {1, 2, 7, 9, 4} as shown in the list of arguments. The variable out_numVar is initialized to 0. The For loop iterates from 0 to the upper bound of the array, which is 4. In each iteration, the If condition checks if the current element of the array is greater than the current value of out_numVar. If it is, then out_numVar is assigned to the current element of the array.
Otherwise, out_numVar remains unchanged. Therefore, after the first iteration, out_numVar becomes 1. After the second iteration, out_numVar becomes 2. After the third iteration, out_numVar becomes 7. After the fourth iteration, out_numVar becomes 9. After the fifth iteration, out_numVar remains 9, since 4 is not greater than 9. The Write Line activity outputs the value of out_numVar to the console, which is
9. References: Invoke Code

The percentages from the Test Explorer panel represent the passing percent of the test cases that are executed.
The Test Explorer panel shows the status of each test case, the total number of test cases, the number of passed test cases, the number of failed test cases, and the passing percent. The passing percent is calculated by dividing the number of passed test cases by the total number of test cases and multiplying by 100. For example, if there are 10 test cases and 8 of them pass, the passing percent is 80%. References: Test Explorer