C#•8mo ago

✅ Help with unit testing a save function on a simple windows form app

For some reason my unit test for my save function isn't writing any text to a text file (to ensure the text actually has been saved) i'm getting the error string.empty when trying to execute the Nunit Test

13 Replies

hugheselite•8mo ago

 else if (CommandSplit[0].Equals("save"))
 {
     string path = @"C:\Users\Hughes Portable Rig\source\repos\GraphicalProgrammingEnvironment";
     string fileName = "saved_user_input.txt";

     try
     {
         // Combine the path and file name
         string filePath = Path.Combine(path, fileName);

         // Save the contents of SingleCommandLine to the specified file
         File.WriteAllText(filePath, SingleCommandLineSaved);

         ErrorHandlingWindow.Clear();
         SingleCommandLine.Clear();
         ErrorHandlingWindow.Text = $"** File '{fileName}' has been saved at '{filePath}' **";
     }
     catch (Exception ex)
     {
         ErrorHandlingWindow.Text = $"Error while saving: {ex.Message}";
     }
 }

 else if (CommandSplit[0].Equals("save"))
 {
     string path = @"C:\Users\Hughes Portable Rig\source\repos\GraphicalProgrammingEnvironment";
     string fileName = "saved_user_input.txt";

     try
     {
         // Combine the path and file name
         string filePath = Path.Combine(path, fileName);

         // Save the contents of SingleCommandLine to the specified file
         File.WriteAllText(filePath, SingleCommandLineSaved);

         ErrorHandlingWindow.Clear();
         SingleCommandLine.Clear();
         ErrorHandlingWindow.Text = $"** File '{fileName}' has been saved at '{filePath}' **";
     }
     catch (Exception ex)
     {
         ErrorHandlingWindow.Text = $"Error while saving: {ex.Message}";
     }
 }

This is my save function im trying to test

        [Test]
        public void TestSave()
        {
            // Arrange
            var mainForm = new mainForm();
            var filePath = @"C:\Users\Hughes Portable Rig\source\repos\GraphicalProgrammingEnvironment\saved_user_input.txt";
            var content = "test content";
            mainForm.SingleCommandLine.Text = $"save {filePath} \"{content}\"";

            // Act
            mainForm.ExecuteCommand();

            // Assert
            Assert.IsTrue(File.Exists(filePath));
            Assert.AreEqual(content, File.ReadAllText(filePath));

            // Clean up
            File.Delete(filePath);
        }
    }

        [Test]
        public void TestSave()
        {
            // Arrange
            var mainForm = new mainForm();
            var filePath = @"C:\Users\Hughes Portable Rig\source\repos\GraphicalProgrammingEnvironment\saved_user_input.txt";
            var content = "test content";
            mainForm.SingleCommandLine.Text = $"save {filePath} \"{content}\"";

            // Act
            mainForm.ExecuteCommand();

            // Assert
            Assert.IsTrue(File.Exists(filePath));
            Assert.AreEqual(content, File.ReadAllText(filePath));

            // Clean up
            File.Delete(filePath);
        }
    }

here is the test itself

hugheselite•8mo ago

https://bitbucket.org/110794-main-workspace/ase-component-1/src/master/

Bitbucket

hugheselite•8mo ago

heres a repo to my entire project

exokem•8mo ago

What string is empty What is the full error or failure and where in your test does it point to

hugheselite•8mo ago

one moment I will post it

hugheselite•8mo ago

exokem•8mo ago

Which is line 72 in TestSavw Nevermind it's the areequal call

hugheselite•8mo ago

exokem•8mo ago

Are you able to verify that an exception does not occur when you try to write to the file? Have you tried debugging the test with breakpoints?

hugheselite•8mo ago

when I try to write the file it works as expected I will try my best to show my time spent using the debugger is minimal it's bad I know lol

exokem•8mo ago

It's worth figuring out how to use the debugger It will save you a lot of waiting for help You can step through the code one line at a time to see what is happening

hugheselite•8mo ago

!close

Accord•8mo ago

Closed!

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✅ Help with unit testing a save function on a simple windows form app