unit_tests.jl

using Test
using SummationByPartsOperators

@testset "DerivativeCoefficientRow" begin
    row1 = SummationByPartsOperators.DerivativeCoefficientRow{Rational,1,3}([1,2,3])
    row2 = SummationByPartsOperators.DerivativeCoefficientRow{Rational,1,3}([2,4,6])
    row3 = SummationByPartsOperators.DerivativeCoefficientRow{Rational,2,3}([2,4,6])

    @test -row1 ==
        SummationByPartsOperators.DerivativeCoefficientRow{Rational,1,3}([-1,-2,-3])

    @test row1 + row2 ==
        SummationByPartsOperators.DerivativeCoefficientRow{Rational,1,3}([3,6,9])

    @test row1 + row3 ==
        SummationByPartsOperators.DerivativeCoefficientRow{Rational,1,4}([1,4,7,6])

    @test row1 / 2 ==
        SummationByPartsOperators.DerivativeCoefficientRow{Rational,1,3}([1//2, 2//2, 3//2])

    @test (row1 + -row3) / 2 ==
        SummationByPartsOperators.DerivativeCoefficientRow{Rational,1,4}([1//2, 0, -1//2, -3])
end