Add more tests

autotests/chatkeyhelpertesthelper.h

@@ -0,0 +1,57 @@
+// SPDX-FileCopyrightText: 2025 James Graham <james.h.graham@protonmail.com>
+// SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
+
+#pragma once
+
+#include <QObject>
+#include <QQuickItem>
+#include <QQuickTextDocument>
+#include <QTextCursor>
+#include <QTextDocumentFragment>
+#include <qquickitem.h>
+
+#include "chatkeyhelper.h"
+#include "chattextitemhelper.h"
+
+class ChatKeyHelperTestHelper : public QObject
+{
+    Q_OBJECT
+    QML_ELEMENT
+
+    Q_PROPERTY(ChatTextItemHelper *textItem READ textItem WRITE setTextItem NOTIFY textItemChanged)
+
+    Q_PROPERTY(ChatKeyHelper *keyHelper READ keyHelper CONSTANT)
+
+public:
+    explicit ChatKeyHelperTestHelper(QObject *parent = nullptr)
+        : QObject(parent)
+        , m_keyHelper(new ChatKeyHelper(this))
+    {
+    }
+
+    ChatTextItemHelper *textItem() const
+    {
+        return m_textItem;
+    }
+    void setTextItem(ChatTextItemHelper *textItem)
+    {
+        if (textItem == m_textItem) {
+            return;
+        }
+        m_textItem = textItem;
+        m_keyHelper->setTextItem(textItem);
+        Q_EMIT textItemChanged();
+    }
+
+    ChatKeyHelper *keyHelper() const
+    {
+        return m_keyHelper;
+    }
+
+Q_SIGNALS:
+    void textItemChanged();
+
+private:
+    QPointer<ChatTextItemHelper> m_textItem;
+    QPointer<ChatKeyHelper> m_keyHelper;
+};