Comparison between Quantities does not work as expected

[t-ober]

When comparing Quantities that are created with the DoubleConverterFactory and ones created "the regular way" we get unexpected failures.

That seems to be because the Units differ in their details.

e.g. the following test fails:

    def "creates units that are comparable to standard Quantity creation"() {

        when:
        def a = Quantities.getQuantity(1.234, PowerSystemUnits.NANOSIEMENS)
        def b = Quantities.getQuantity(1.234, MetricPrefix.NANO(Units.SIEMENS))

        then:
        a == b
    }

[t-ober]

Related: ie3-institute/simBench2psdm#138

[sebastian-peter]

As discussed, there is no easy solution to this besides just using the units in PowerSystemUnits. These also have the advantage that they can speed up calculations with quantities.