Second Enhancement to File List


That covers the case of copying files locally. But let's not forget why we came on this journey. We need to be able to copy files from a remote folder.

Writing a unit test for remote file copying seems problematic. The problem would be that we cannot create a test where we can fully expect repeatable access to a remote machine. At this time the best option may be to test manually. Since we already have a method that creates copies just fine on a local system, let's see how it behaves when we try to fetch a file from a remote system.

A manual test using "copy file" from a remote system

Open up a FileList and navigate over to the remote system. Try copying the file...

We got a walkback.

Looks as if the problem is that the new method we wrote is not understood by the ServerDirectory class. Makes sense; we didn't think about that.

Let's leave the Debugger around while we browse the ServerDirectory class. If we want to create a new #copyFileNamed:toDirectory: method for this class it looks like we could use pretty much the same code as the one we wrote on FileDirectory. The method #copyFile:toFile: is missing however. So let's see what happens if we copy that method over and then copy our new method over.

Create these 2 new instance methods in ServerDirectory:

copyFile: fileStream1 toFile: fileStream2
    | buffer |
    buffer := String new: 50000.
    [fileStream1 atEnd]
        whileFalse: [fileStream2 nextPutAll: (fileStream1 nextInto: buffer)]

copyFileNamed: fileName toDirectory: aDirectory
    "Copy the contents of the existing file into a directory."
    | file1 file2 |
    self = aDirectory ifTrue: [^ nil].
    file1 := (self readOnlyFileNamed: fileName) binary.
    file2 := (aDirectory newFileNamed: fileName) binary.
    self copyFile: file1 toFile: file2.
    file1 close.
    file2 close
Let's see if that takes care of things. Bring the Debugger back. Make sure you have the #copySelectedFileToDirectory: method selected in the Debugger and hit "Restart" and then "Proceed".

For my example, it worked! I went back and copied some other files from a new FileList just to be sure.

Continue on to the next page of second FileList enhancement.

Back to the beginning of this example.

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