File Add-property-read-write-test.patch of Package FreeCAD

From 6f23f01e509348a6755ad3c465a3d7ffd758ee03 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@freecad.org>
Date: Sat, 28 Sep 2024 00:29:40 +0200
Subject: [PATCH] Tests: Add unit test for PR #16763

---
 tests/src/App/Property.cpp | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/tests/src/App/Property.cpp b/tests/src/App/Property.cpp
index 9ab8aeffa6c1..528ca56f2fa1 100644
--- a/tests/src/App/Property.cpp
+++ b/tests/src/App/Property.cpp
@@ -1,6 +1,9 @@
 #include <gtest/gtest.h>
 
 #include "App/PropertyLinks.h"
+#include <App/PropertyStandard.h>
+#include <Base/Writer.h>
+#include <Base/Reader.h>
 
 TEST(PropertyLink, TestSetValues)
 {
@@ -13,3 +16,27 @@ TEST(PropertyLink, TestSetValues)
     EXPECT_EQ(sub[0], "Sub1");
     EXPECT_EQ(sub[1], "Sub2");
 }
+
+TEST(PropertyFloatTest, testWriteRead)
+{
+#if defined(FC_OS_LINUX) || defined(FC_OS_BSD)
+    setlocale(LC_ALL, "");
+    setlocale(LC_NUMERIC, "C");  // avoid rounding of floating point numbers
+#endif
+    double value = 1.2345;
+    App::PropertyFloat prop;
+    prop.setValue(value);
+    Base::StringWriter writer;
+    prop.Save(writer);
+
+    std::string str = "<?xml version='1.0' encoding='utf-8'?>\n";
+    str.append("<Property name='Length' type='App::PropertyFloat'>\n");
+    str.append(writer.getString());
+    str.append("</Property>\n");
+
+    std::stringstream data(str);
+    Base::XMLReader reader("Document.xml", data);
+    App::PropertyFloat prop2;
+    prop2.Restore(reader);
+    EXPECT_DOUBLE_EQ(prop2.getValue(), value);
+}