PragTob / benchee / 1251

94%

master: 94%

Pull #268

travis-ci

Add Scenario.data_processed? to simplify checks in formatters

Formatters often have to check whether run time or memory data
was processed - so if data was collected at all and if statistics
have already been generated so that they can be rendered.

This should simplify this/not tie all of them to the internal
data structure.

The decision as made to check directly on statistics to see if
values actually made it into it, rather than just checking the
configuration if it was intended to measure, so that we're sure
that values are there.

This might sound like a check on `Suite` to check if all scenarios
have all data might be a good thing, however mostly formatters
split things by input so it will more often be checked on a
sub set of scenarios or individual scenarios.

This PR doesn't use the function in our formatters yet, to avoid
merge conflicts with #264 :) #264 will have to adjust its
implementation though, but that should be very easy and straight
forward.

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