Add tests using testthat

[thibautjombart]

Especially test round trips.

[andysouth]

started added first very simple tests for constructors see : 9c3c9d1

[thibautjombart]

Cool =D

On Wed, May 6, 2015 at 2:25 PM, Andy South notifications@github.com wrote:

started added first very simple tests for constructors see : 9c3c9d1
9c3c9d1

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#6 (comment).

[twomagpi]

There is a quick list of things that should be tested in testthat.R. Some are already tested by the examples but we could also be explicit.