[CMake] Problems running npm-based tests on Windows

[Andrey Fedorov]

As demonstrated here https://github.com/QIICR/dcmqi/pull/79, the
problem is resolved when .cmd versions of the commands are used.

On Wed, Aug 24, 2016 at 1:10 PM, Andrey Fedorov
<andrey.fedorov at gmail.com> wrote:
> Hi,
>
> we are running ctest's on appveyor using npm-installed packages.
> Specifically, we run jsonlint and ajv on json files to validate the
> content.
>
> Packages are installed in this line:
> https://github.com/QIICR/dcmqi/blob/master/appveyor.yml#L12-L13 of the
> appveyor configuration.
>
> The installed packages can be run wihtout problems when invoked
> directly from command line on appveyor. These lines
> https://github.com/QIICR/dcmqi/blob/master/appveyor.yml#L35-L36 both
> work fine on appveyor:
> https://ci.appveyor.com/project/fedorov/dcmqi/build/0.0.251#L1203.
>
> The path to the ajv package used by ctest is identical to the one that
> works when invoked directly from the cmd shell; here is the location
> where ctest is invoked:https://github.com/QIICR/dcmqi/blob/master/appveyor.yml#L37,
> and this is the where it is being run by appveyor:
> https://ci.appveyor.com/project/fedorov/dcmqi/build/0.0.251#L1662.
>
> Bottom line: ajv works when invoked directly from the appveyor windows
> cmd shell, but not when called by ctest.
>
> Why is ctest failing to run the test with "Not Run/BAD_COMMAND" status?
>
> AF