asp net core barcode scanner

asp net core barcode scanner

asp net core barcode scanner

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If you have used JUnit before, this will look familiar. Lines 3 17 contain the test setup and teardown functionality. The setup runs before each test, and the teardown runs after

Other POSIX shells do not have this syntax, so I need another method of combining directory and filename and checking them.

each test. The only interesting thing to point out here is that lines 9 and 16 use dynamic methods. Lines 24 39 contain the handleLogin action positive test. The action takes userName as a parameter. Line 27 adds user.userName to the parameters to be passed to the action. Line 30 calls the handleLogin action using the parameters you just defined. Lines 34 36 validate that the action set the user into the session. If you look closely, you ll see that the test uses the Groovy assert and the JUnit assertEquals. In Groovy, assert considers null to be false. If the user wasn t put in the session, assert would fail. Line 38 looks in the UserController response to validate that the user was redirected to the Todo List view. Lines 46 56 contain the handleLogin action negative test and use an invalid userName. As you might expect, lines 48 51 create an invalid username and call the action. Line 52 validates that the user is redirected to the proper view. Lines 53 55 validate that a flash message was generated to tell the user that he or she was not logged in. We ll cover flash messages in more detail shortly in the Flash and Flash Messages section. Lines 64 71 contain the logout action test. Lines 66 68 manually add the user to the session and call the action. Lines 69 and 70 validate that the session doesn t contain a user object. Line 71 validates that the user is redirected to the login view. Now for some fun. You run all the tests with the grails test-app command, and you run individual tests by appending the test name, as shown here:

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There is only one useful method on the Timer class: Change. The Change method is used to change the due time and interval of the timer and has four overloads that match the four ways to specify due time and period in the constructor. The work method takes a single object parameter that corresponds to the state parameter passed to the constructor (or the Timer object itself if the first form of the constructor was used). private void doSomething(object state) { Dispatcher.BeginInvoke( delegate() { timerOutputText.Text = (Convert.ToInt32(timerOutputText.Text) + 1).ToString(); }); }

The directory given as the first argument is prepended to each of the other arguments in turn. The resulting path is checked, and the function returns with an error as soon as a given file does not exist. Usage checkfiles DIR FILE ... The function fails if a file does not exist, and the name of the first nonexistent file will be in $_CHECKFILE. $ checkfiles /bin bash1 bash2 bash3 bash4 bash5 || > printf "%s\n" "$_CHECKFILE does not exist" bash4 does not exist The Script checkfiles() { checkdict=$1 [ -d "$checkdict" ] || return 13 shift for _CHECKFILE do [ -f "$checkdict/$checkfile" ] done }

The command executes the UserControllerTest and produces the following output:

Since the work method happens on a different thread, the Dispatcher must be used to make changes to the user interface. A button on the user interface is again hooked up to a method that starts/stops the timer: private void timerButton_Click(object sender, RoutedEventArgs e) { if (threadTimer != null) { threadTimer.Change(0, Timeout.Infinite); timerButton.Content = "Start Timer"; } else { if (threadTimer != null) threadTimer.Change(Convert.ToInt32(dueTimeTextBox.Text) * 1000, Convert.ToInt32(periodTextBox.Text) * 1000); else threadTimer = new Timer(new TimerCallback(doSomething), null, Convert.ToInt32(dueTimeTextBox.Text) * 1000, Convert.ToInt32(periodTextBox.Text) * 1000); timerButton.Content = "Stop Timer"; } } You instruct the timer to stop by setting the period to Timeout.Infinite. The Change method is used to restart the timer also. This is the only way to interact with the Timer after it has been created, except for destroying it via Dispose.

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