Add tests to increase code coverage

Still I expect moderate coverage, since:

 • I don't know how to test the +paletteditor functions, since they
   feature a GUI... it might be impossible to include them.

 • I don't really know how to test cprintf, being its functionality
   bound to the Java runtime of GUI matlab... again, what to do?

 • Still missing some genuine spots (e.g. diverging_cmap is untested).

+rgb/X11.m

@@ -77,7 +77,7 @@
         % Make sure the function can load the data, rebuild it if necessary
         disp 'Cannot load X11/rgb database. I will try to import from local X11.txt file now.'
         X11_install
-        % Load data created by xkcd_install
+        % Load data created by X11_install
         load([here,'/private/X11_rgb_data.mat'],'namelist','rgblist');
     end
 
@@ -166,7 +166,7 @@
 
 end
 
-%% Web-installation subfunction: 
+%% installation subfunction: 
 
 function X11_install 
 
@@ -186,13 +186,13 @@
     if ~exist('X11.txt','file')
         disp 'Cannot find X11.txt file.'
         try
-        %websave('rgb.txt','https://X11.com/color/rgb.txt');
+        % websave('rgb.txt','https://do-not-know-a-url.txt');
         catch 
             try
-                %urlwrite('https://X11.com/color/rgb.txt','rgb.txt'); %#ok <GNU>
+                % urlwrite('https://do-not-know-a-url.txt,'rgb.txt'); %#ok <GNU>
             catch
-                disp('Having trouble downloading the txt file. You''ll need to download it manually')
-                disp('from http://X11.com/color/rgb.txt and place it in current folder. Then run again.')
+                disp('Having trouble finding the txt file. You''ll need to retrieve it manually')
+                disp('from your *nix system and place it in current folder. Then run again.')
                 return
             end
         end

.test/test_X11_update.m

@@ -0,0 +1,23 @@
+X11_update()
+
+function X11_update()
+
+    disp('TESTING upgrade of X11 colors [rgb.X11]')
+
+    colorlab.enter
+    close all
+    clear
+
+    here = pwd;
+    root = erase(fileparts(mfilename('fullpath')),'.test');
+    cd(root)
+    cd('+rgb/private')
+    delete('X11_rgb_data.mat')
+    cd(here)
+
+    rgb.X11('white');
+
+    disp('>> All good!')
+    disp('------------')
+
+end

.test/test_all_docstrings.m

@@ -8,6 +8,49 @@ function all_docstrings()
     close all
     clear
 
+    disp COLORNAMES 
+
+    disp colorshow
+    import rgb.*
+    X11('show')
+    xkcd('show')
+    disp '...done!'
+
+    disp X11
+    X11('navyblue') 
+    X11('SpringGreen','CornflowerBlue','sapphire','radioactive green')
+    x = -pi:.1:pi;
+    y = cos(x);
+    plot(x,y,'linewidth',4,'color',X11('CornflowerBlue'))
+    hold on
+    plot(x,y-1,'*','color',X11('Brown1'))
+    plot(x,y-2,'linewidth',4,'color',X11('SeaGreen'))
+    legend('cornflower','brown1 (wtf?!)','SeaGreen') 
+    set(gca,'color',X11('seashell'))
+    text(-1,-2,'This text is chocolate (wtf?!).','fontweight','bold','color',...
+            X11('chocolate')); 
+    close all
+    disp '...done!'
+
+    disp xkcd
+    xkcd('baby blue') 
+    xkcd('wintergreen','sunflower yellow','sapphire','radioactive green')
+    x = -pi:.1:pi;
+    y = cos(x);
+    plot(x,y,'linewidth',4,'color',xkcd('cornflower'))
+    hold on
+    plot(x,y-1,'*','color',xkcd('strawberry'))
+    plot(x,y-2,'linewidth',4,'color',xkcd('puke green'))
+    legend('cornflower','strawberry','puke green') 
+    set(gca,'color',xkcd('eggshell'))
+    text(-1,-2,'This text is burnt orange.','fontweight','bold','color',...
+            xkcd('burnt orange')); 
+    close all
+    disp '...done!'
+
+    disp('>> All good!')
+    disp('------------')
+
     disp COLORTOOLS
 
     disp view_color
@@ -130,7 +173,7 @@ function all_docstrings()
     surfc(X,Y,Z)
     cmap = palette.cubehelix([],0.7,-0.7,2,1,[0.1,0.9],[0.1,0.9]);
     colormap(cmap)
-    preset_palette(@palette.cubehelix, 3,-0.5,1.5,1); % preselect the map.
+    preset_palette(@palette.cubehelix,[3,-0.5,1.5,1]); % preselect the map.
     cmap = palette.cubehelix([],3,-0.5,1.5,1);
     assert(isequal(cmap,preset_palette))
     clear; close
@@ -161,9 +204,6 @@ function all_docstrings()
     close all force % brewer is nasty
     disp '...done!'
 
-    disp('>> All good!')
-    disp('------------')
-
 end
 
 function names = matplotlib_names()

.test/test_cmocean_negative.m

@@ -0,0 +1,19 @@
+cmocean_negative()
+
+function cmocean_negative()
+
+    disp('TESTING negative lightness [palette.cmocean]')
+
+    colorlab.enter
+    close all
+    clear
+
+    map1 = get_palette('algae',256,'negative');
+    map2 = palette.cmocean('algae','negative');
+
+    assert(isequal(map1,map2))
+
+    disp('>> All good!')
+    disp('------------')
+
+end

.test/test_crameri_update.m

@@ -0,0 +1,20 @@
+upgrade_crameri()
+
+function upgrade_crameri()
+
+    disp('TESTING upgrading of crameri [private function]')
+
+    here = pwd;
+    root = erase(fileparts(mfilename('fullpath')),'.test');
+    cd(root)
+    cd('crameri')
+    disp('Release 7 [zenodo::5501399]')
+    crameri_update(7,5501399)
+    disp('Release 6 [zenodo::4153113]')
+    crameri_update('6','4153113')
+    cd(here)
+
+    disp('>> All good!')
+    disp('------------')
+
+end

.test/test_install.m

@@ -0,0 +1,14 @@
+install()
+
+function install()
+
+    disp('TESTING (un)install procedures [+colorlab]')
+
+    colorlab.vista 
+    colorlab.enter 
+    colorlab.leave 
+
+    disp('>> All good!')
+    disp('------------')
+
+end

.test/test_xkcd_update.m

@@ -0,0 +1,23 @@
+xkcd_update()
+
+function xkcd_update()
+
+    disp('TESTING upgrade of xkcd colors [rgb.xkcd]')
+
+    colorlab.enter
+    close all
+    clear
+
+    here = pwd;
+    root = erase(fileparts(mfilename('fullpath')),'.test');
+    cd(root)
+    cd('+rgb/private')
+    delete('xkcd_rgb_data.mat')
+    cd(here)
+
+    rgb.xkcd('white');
+
+    disp('>> All good!')
+    disp('------------')
+
+end