New matchers to compare easily a number with another one

[baudoliver7]

We notice many times that we need to compare a number with another one. Currently, outside of static methods of Hamcrest (greaterThan, lessThan), the more easy way to do this is to use Verifies like this :

new Satisfies(x -> x > 0)

It would be very useful to introduce some new matchers to make this kind of assertions more expressive :

• IsGreaterThan
• IsGreaterThanOrEqualTo
• IsLessThan
• IsLessThanOrEqualTo

[victornoel]

@baudoliver7 thx and also let's note that those matcher should implement Matcher<Number> IMHO

[victornoel]

@0crat in

[andreoss]

@victornoel Why not Matcher<Comparable<?>>?

[victornoel]

@andreoss yes, that would make sense, or Matcher<Comparable<? extends T>> (or would that be super? I think both would work actually here ^^). Let's note that even though Number does not implement Comparable, all its subclasses do. But in cactoos, the Number implementation must be wrapped in ComparableNumber though (it's not yet implemented but will be part of yegor256/cactoos#1587)

[victornoel]

@0crat assign @andreoss

[victornoel]

@0crat status

[0crat]

@0crat status (here)

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