[TIMOB-26149] Android: Ti.Filesystem.File#getDirectoryListing() does not return null for file/non-existent directory

[sgtcoolguy]

JIRA: https://jira.appcelerator.org/browse/TIMOB-26149

Description:
Adds unit tests around Ti.Filesystem.File#getDirectoryListing() to confirm behaviors.

• returns null if it's a file or doe not exist
• returns an empty Array for an empty directory
• returns an Array of Strings for a typical directory containing files.

Modifies Android's implementation to match iOS/docs.

[cb1kenobi]

I would argue that getDirectoryListing() should throw an Error if the file does not exist. This is what Node.js does for fs.readdirSync().

[sgtcoolguy]

@cb1kenobi I would tend to agree, but:

• I don't think we really throw Errors in our APIs generally
• That'd be a breaking API change

I was trying to fix parity. If we do want to start making our APIs throw Errors like that, then I think that's a larger architectural design decision that we'd have to move towards over time as it's really a breaking API change (and should be done throughout our APIs, not piecemeal).

[cb1kenobi]

Sounds good. 👍

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[jquick-axway]

CR: Pass