+See [[contrib/po|contrib/po]].
+
+Robustness tests
+----------------
+
+### Disabling the plugin
+
+- enabling the plugin with `po_translatable_pages` set
+- enabling the plugin without `po_translatable_pages` set: **OK**
+- disabling the plugin: **OK**
+
+### Changing the plugin config
+
+- adding existing pages to `po_translatable_pages`: **OK**
+- removing existing pages from `po_translatable_pages`: **OK**
+- adding a language to `po_slave_languages`: **OK**
+- removing a language from `po_slave_languages`: **OK**
+- changing `po_master_language`: **OK**
+- replacing `po_master_language` with a language previously part of
+ `po_slave_languages`: needs two rebuilds, but **OK** (this is quite
+ a perverse test actually)
+
+### Creating pages
+
+- creating a master page via RCS: **OK**
+- creating a master page via CGI: **OK**
+
+### Deleting pages
+
+- removing a master page via RCS: **OK**
+- removing a translation via RCS: **OK**
+- removing a master page via CGI: **OK**
+- removing a translation via CGI: **OK**
+
+### Renaming pages
+
+- renaming a master page via RCS: **OK** (but the old translations
+ are lost, because not all RCS track file renaming)
+- renaming a master page and its translations via RCS: **OK**
+- renaming a master page via CGI: **OK**
+- renaming a translation via RCS
+- renaming a translation via CGI
+
+### Misc
+
+- general test with `usedirs` disabled: **OK**
+- general test with `indexpages` enabled
+- general test with `po_link_to=default`