tests for 3D colorbar

test/test_pgfplotsx.jl

@@ -2,12 +2,31 @@ using Plots, Test
 pgfplotsx()
 
 function create_plot( args...; kwargs... )
-    pgfx_plot = plot(args..., kwargs...)
+    pgfx_plot = plot(args...; kwargs...)
+    return pgfx_plot, repr("application/x-tex", pgfx_plot)
+end
+
+function create_plot!( args...; kwargs... )
+    pgfx_plot = plot!(args...; kwargs...)
     return pgfx_plot, repr("application/x-tex", pgfx_plot)
 end
 
 @testset "PGFPlotsX" begin
     pgfx_plot, pgfx_tex = create_plot(1:5)
-    
+
     @test pgfx_plot.o isa PGFPlotsX.GroupPlot
+     @testset "3D docs example" begin
+        n = 100
+        ts = range(0, stop=8π, length=n)
+        x = ts .* map(cos, ts)
+        y = (0.1ts) .* map(sin, ts)
+        z = 1:n
+        pl = plot(x, y, z, zcolor=reverse(z), m=(10, 0.8, :blues, Plots.stroke(0)), leg=false, cbar=true, w=5)
+                    @show PGFPlotsX.CUSTOM_PREAMBLE
+                    @show PGFPlotsX.CUSTOM_PREAMBLE_PATH
+        pgfx_plot, pgfx_tex = create_plot!(pl, zeros(n), zeros(n), 1:n, w=10)
+        if @test_nowarn(haskey(pgfx_plot.o.contents[1].options.dict, "colormap") == true)
+            @test pgfx_plot.o.contents[1]["colormap"] === nothing
+        end
+     end # testset
 end # testset