--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mupdf-source/scripts/mupdfwrap_test.cs	Mon Sep 15 11:43:07 2025 +0200
@@ -0,0 +1,125 @@
+public class HelloWorld
+{
+    public static void Main(string[] args)
+    {
+        System.Console.WriteLine("MuPDF C# test starting.");
+
+        // Check FZ_ENABLE_FB2.
+        System.Console.WriteLine("FZ_VERSION=" + mupdf.mupdf.FZ_VERSION);
+        System.Console.WriteLine("FZ_ENABLE_FB2=" + mupdf.mupdf.FZ_ENABLE_FB2);
+
+        // Check we can load a document.
+        mupdf.FzDocument document = new mupdf.FzDocument("zlib.3.pdf");
+        System.Console.WriteLine("document: " + document);
+        System.Console.WriteLine("num chapters: " + document.fz_count_chapters());
+        mupdf.FzPage page = document.fz_load_page(0);
+        mupdf.FzRect rect = page.fz_bound_page();
+        System.Console.WriteLine("rect: " + rect);
+        if ("" + rect != rect.to_string())
+        {
+            throw new System.Exception("rect ToString() is broken: '" + rect + "' != '" + rect.to_string() + "'");
+        }
+
+        // Test conversion to html using docx device.
+        var buffer = page.fz_new_buffer_from_page_with_format(
+                "docx",
+                "html",
+                new mupdf.FzMatrix(1, 0, 0, 1, 0, 0),
+                new mupdf.FzCookie()
+                );
+        var data = buffer.fz_buffer_extract();
+        var s = System.Text.Encoding.UTF8.GetString(data, 0, data.Length);
+        if (s.Length < 100) {
+            throw new System.Exception("HTML text is too short");
+        }
+        System.Console.WriteLine("s=" + s);
+
+        // Check that previous buffer.fz_buffer_extract() cleared the buffer.
+        data = buffer.fz_buffer_extract();
+        s = System.Text.Encoding.UTF8.GetString(data, 0, data.Length);
+        if (s.Length > 0) {
+            throw new System.Exception("Buffer was not cleared.");
+        }
+
+        // Check we can create pixmap from page.
+        var pixmap = page.fz_new_pixmap_from_page_contents(
+                new mupdf.FzMatrix(1, 0, 0, 1, 0, 0),
+                new mupdf.FzColorspace(mupdf.FzColorspace.Fixed.Fixed_RGB),
+                0 /*alpha*/
+                );
+
+        // Check returned tuple from bitmap.fz_bitmap_details().
+        var w = 100;
+        var h = 200;
+        var n = 4;
+        var xres = 300;
+        var yres = 300;
+        var bitmap = new mupdf.FzBitmap(w, h, n, xres, yres);
+        (var w2, var h2, var n2, var stride) = bitmap.fz_bitmap_details();
+        System.Console.WriteLine("bitmap.fz_bitmap_details() returned:"
+                + " " + w2 + " " + h2 + " " + n2 + " " + stride);
+        if (w2 != w || h2 != h) {
+            throw new System.Exception("Unexpected tuple values from bitmap.fz_bitmap_details().");
+        }
+
+        // Check we get exception from MuPDF. As of 2024-06-14 this exception
+        // does not contain the original MuPDF exception text, it just says
+        // "External component has thrown an exception."
+        //
+        // We only do this test if not running on Mono - Mono fails
+        // with:
+        //
+        // > terminate called after throwing an instance of
+        // > 'mupdf::FzErrorSystem'
+        //
+        if (System.Type.GetType("Mono.Runtime") == null)
+        {
+            int received_exception = 0;
+            try
+            {
+                mupdf.FzDocument document2 = new mupdf.FzDocument("does not exist");
+                System.Console.WriteLine("*** Error, did not get expected exception.");
+            }
+            catch (System.Exception e)
+            {
+                received_exception = 1;
+                System.Console.WriteLine("Received exception: " + e.Message);
+            }
+            if (received_exception != 1)
+            {
+                throw new System.Exception("Did not receive expected exception");
+            }
+        }
+        else
+        {
+            System.Console.WriteLine("Not checking handling of exceptions because running on Mono.");
+        }
+
+        // Check we can make MuPDF open filename containing 4-byte
+        // unicode character. This file will have been created by
+        // `scripts/wrap/__main__.py --test-csharp`.
+        byte[] text_utf8 =
+        {
+                0xf0,
+                0x90,
+                0x90,
+                0xb7,
+        };
+        string testfile2 = "zlib.3.pdf"
+                + System.Text.Encoding.UTF8.GetString(text_utf8)
+                + ".pdf";
+        System.Console.WriteLine("Opening testfile2: " + testfile2);
+        try
+        {
+            mupdf.FzDocument document2 = new mupdf.FzDocument(testfile2);
+            System.Console.WriteLine("new mupdf.FzDocument succeeded");
+        }
+        catch (System.Exception e)
+        {
+            System.Console.WriteLine("Exception: " + e.Message);
+            throw new System.Exception("Failed to open filename containing 4-byte unicode character");
+        }
+
+        System.Console.WriteLine("MuPDF C# test finished.");
+    }
+}