[Tests] Drive item views from a playback

QtTesting's own `currentChanged` command aborts on a one-element row list, so
pqWidgetTestEventPlayer drives views itself:

- selectRow selects a row through the selection model, the whole row, without a
  mouse event
- clickRow left-clicks the centre of a cell, so the view's own handlers run
- doubleClickRow double-clicks it, for views whose double click acts

A tree addresses a row by the path of rows leading to it ("2/0" is the first
child of the third top-level row), and a click opens a collapsed path first.
Rows are model rows, so a filtered or sorted model counts the rows it shows.

Asserting what a command did needs QtTesting's check players, which the XML
source never reached: it marked every event an action, so `modelRowCount` was
rejected as unknown. An event now carries `type="check"` to be played as a
check.

Testing/item_view_test.xml drives the grouped settings navigation through
selectRow and clickRow and asserts the page stack followed.
Testing/deck_editor_double_click_test.xml proves the difference between the two
clicks: a single click on a card database row only selects it, a double click
adds the card to the deck.

cockatrice/src/interface/pq_widget_test_event_player.h

@@ -3,12 +3,17 @@
 
 #include "pqWidgetEventPlayer.h"
 
+class QAbstractItemView;
+class QModelIndex;
+
 /**
  * Widget-level commands for the UI tests.
  *
  * pqCockatriceEventPlayer handles cards and zones inside the game scene. This
  * player covers the rest of the client: capturing a widget as an image,
- * dumping the paths QtTesting addresses widgets by, and sizing the window.
+ * dumping the paths QtTesting addresses widgets by, sizing the window, and
+ * driving item views, whose selection QtTesting's own `currentChanged` command
+ * cannot handle.
  *
  * Commands:
  *   screenshot "<path>"
@@ -20,6 +25,17 @@
  *       addresses it by, for writing a test
  *   resize "WIDTHxHEIGHT"
  *       resizes the addressed widget's top-level window
+ *   selectRow "row[/row...][,column]"
+ *       selects that row of an item view, the whole row, without a mouse event
+ *   clickRow "row[/row...][,column]"
+ *       left-clicks the centre of that cell, so the view's own handlers run
+ *   doubleClickRow "row[/row...][,column]"
+ *       double-clicks it, for rows that act on double click
+ *
+ * A tree addresses a row by the path of rows leading to it: "2/0" is the first
+ * child of the third top-level row. A click opens a collapsed path first.
+ * Rows are model rows of the addressed view, so a filtered or sorted model
+ * counts the rows it shows.
  */
 class pqWidgetTestEventPlayer : public pqWidgetEventPlayer
 {
@@ -37,7 +53,15 @@ private:
     bool playScreenshot(QObject *object, const QString &arguments);
     bool playDumpTree(QObject *object, const QString &arguments);
     bool playResize(QObject *object, const QString &arguments);
+    bool playSelectRow(QObject *object, const QString &arguments);
+    bool playClickRow(QObject *object, const QString &arguments, bool doubleClick);
 
+    /** @brief The item view the event is addressed at, following a viewport to its view. */
+    static QAbstractItemView *itemViewFor(QObject *object);
+    /** @brief Resolves "row[,column]" to a valid model index of @p view. */
+    static bool resolveCell(QAbstractItemView *view, const QString &arguments, QModelIndex &index);
+    /** @brief Sends the mouse events a real click on @p index produces. */
+    static bool clickCell(QAbstractItemView *view, const QModelIndex &index, bool doubleClick);
     /** @brief Expands $NAME / ${NAME} and creates the file's parent directory. */
     static bool resolveOutputPath(const QString &command, const QString &path, QString &resolved);
 };