Add tests for ChatMarkdownHelper and rework how formats are applied to make it more robust.

autotests/chatmarkdownhelpertestwrapper.h

@@ -0,0 +1,84 @@
+// 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 <QTextCursor>
+#include <qtextcursor.h>
+
+#include "chatmarkdownhelper.h"
+#include "enums/richformat.h"
+#include "qmltextitemwrapper.h"
+
+class ChatMarkdownHelperTestWrapper : public QObject
+{
+    Q_OBJECT
+    QML_ELEMENT
+
+    /**
+     * @brief The QML text Item the ChatDocumentHandler is handling.
+     */
+    Q_PROPERTY(QQuickItem *textItem READ textItem WRITE setTextItem NOTIFY textItemChanged)
+
+public:
+    explicit ChatMarkdownHelperTestWrapper(QObject *parent = nullptr)
+        : QObject(parent)
+        , m_chatMarkdownHelper(new ChatMarkdownHelper(this))
+        , m_textItem(new QmlTextItemWrapper(this))
+    {
+        connect(m_chatMarkdownHelper, &ChatMarkdownHelper::textItemChanged, this, &ChatMarkdownHelperTestWrapper::textItemChanged);
+        connect(m_chatMarkdownHelper, &ChatMarkdownHelper::unhandledBlockFormat, this, &ChatMarkdownHelperTestWrapper::unhandledBlockFormat);
+    }
+
+    QQuickItem *textItem() const
+    {
+        return m_chatMarkdownHelper->textItem();
+    }
+    void setTextItem(QQuickItem *textItem)
+    {
+        m_chatMarkdownHelper->setTextItem(textItem);
+        m_textItem->setTextItem(textItem);
+    }
+
+    Q_INVOKABLE bool checkText(const QString &text)
+    {
+        const auto doc = m_textItem->document();
+        if (!doc) {
+            return false;
+        }
+        qWarning() << text << doc->toPlainText();
+        return text == doc->toPlainText();
+    }
+
+    Q_INVOKABLE bool checkFormats(QList<RichFormat::Format> formats)
+    {
+        const auto cursor = m_textItem->textCursor();
+        if (cursor.isNull()) {
+            return false;
+        }
+        qWarning() << RichFormat::formatsAtCursor(cursor) << formats;
+        return RichFormat::formatsAtCursor(cursor) == formats;
+    }
+
+    Q_INVOKABLE void clear()
+    {
+        auto cursor = m_textItem->textCursor();
+        if (cursor.isNull()) {
+            return;
+        }
+        cursor.select(QTextCursor::Document);
+        cursor.removeSelectedText();
+        cursor.setBlockCharFormat(RichFormat::charFormatForFormat(RichFormat::Paragraph));
+        cursor.setBlockFormat(RichFormat::blockFormatForFormat(RichFormat::Paragraph));
+    }
+
+Q_SIGNALS:
+    void textItemChanged();
+    void unhandledBlockFormat(RichFormat::Format format);
+
+private:
+    QPointer<ChatMarkdownHelper> m_chatMarkdownHelper;
+    QPointer<QmlTextItemWrapper> m_textItem;
+};