Fixed the droplet 1d test, it's a circular segment area.

test/simulate.jl

@@ -82,12 +82,12 @@
         droph = maximum(h)
         # Compute the droplets shape after 10k time steps
         vnum = 1/6*π*droph*(3*droprad^2 + droph^2)
-        sph_r = droph/2 + length(findall(h .> thresh))^2/(8*droph)
-        ar = sph_r^2/2*(π/9 - sinpi(1/9))
+        sph_r =  droph/2 + length(findall(h .> thresh))^2/(8*droph)
+        ar = 2/3 * length(drop1d) * droph # sph_r * π/6 # It's one dimensional so it is the arc length .. sph_r^2/2*(π/9 - sinpi(1/9))
         # Test that the droplet volume has not changed too much
+        @test vol ≈ vnum atol = vol/100*10 
         # TODO fix these two tests
-        # @test vol ≈ vnum atol = vol/100*10 # This breaks in 1d I have to investigate at some point in time
-        # @test ar ≈ sum(drop_ar) atol = ar/100*10
+        @test ar ≈ sum(drop_ar) atol = ar/100*10
         @test r1 ≈ droprad atol = r1/100*10
         @test A[1] < A[end]
         sys = Swalbe.SysConst_1D(L = 200, param=Swalbe.Taumucs(Tmax=100, δ=3.0, tdump=50))