Test extension engine compatibility

[sandy081]

Test for #11573

• Any OS @mousetraps

Complexity - 3

Here you verify if VS Code lets you install / update the extension version compatible to the current VS Code.

Set up

Note: Have the latest VSCE installed

• Make sure you can publish an extension. Ref - http://code.visualstudio.com/docs/tools/vscecli
• Use the sample test extensions
• This repo has 3 extension packs (1, 2, 3) which are already published
• Use these extensions for testing following scenarios (You can also come up with your own if you want to :) )
• Do play around with following property in package.json for testing different scenarios

"engines": {
        "vscode": "^1.0.0"
    }

Note: Publishing the extension takes a while to get reflected in the market place.

Installing the compatible version

• Make sure the latest version of extension you are installing is not compatible with current VS code version. And one of the older versions is compatible. Use the above engines-->vscode property and publish accordingly.
• Installing this extension should install the version compatible to the current VS Code.

Updating the compatible version

• Make sure that Extensions view does not show the above extension as outdated even if it has a newer version which is not compatible.
• If there a new version which is compatible then this should be shown as outdated (Update action is enabled).
• Updating this extension, updates to the latest version compatible

[sandy081]

@chrmarti FYI - Please add it our test plan. Thanks