Unit tests should exercise constructors

[HadrienG2]

So, I tried to integrate #100 in my project to see if it solves the problem it's intended to solve, and I discovered a bunch of issues related to constructors of batch and batch_bool. This means that we don't yet have unit tests for them.

[HadrienG2]

Constructors to be tested

batch_bool

• Default constructor
• Explicit broadcasting constructor from a bool
• Constructor from a list of bools
• Converting to inner type + copy constructor

batch

• Default constructor
• Explicit broadcasting constructor from a scalar
• Constructor from a list of scalars
• Constructor from a pointer (explicit, aligned, and unaligned)
• Converting to inner type + copy constructor

[serge-sans-paille]

For the record: constructor from no value, broadcast of a value and list of scalars are supported and tested. Constructor from aligned/unaligned memory is done from free-functions.

I don't quite understand what you mean by "Converting to inner type + copy constructor". Feel free to open a new issue for that one if you don't find the relevant call in the doc :-)