Range.Text returned the wrong value for format #.##0"*";(#.##0)"*" on negative values

Author: JanKallman

src/EPPlus/Utils/ValueToTextHandler.cs

@@ -163,7 +163,7 @@ private static string FormatNumber(double d, string format, CultureInfo cultureI
             var s = FormatNumberExcel(d, format, cultureInfo);
             if (string.IsNullOrEmpty(s) == false && (
                     s.StartsWith("--") && format.StartsWith("-") ||
-                   (s.StartsWith("-(", StringComparison.OrdinalIgnoreCase) && format.StartsWith("(", StringComparison.OrdinalIgnoreCase) && format.EndsWith(")", StringComparison.OrdinalIgnoreCase))))
+                   (s.StartsWith("-(", StringComparison.OrdinalIgnoreCase) && format.StartsWith("(", StringComparison.OrdinalIgnoreCase) && format.IndexOf(")", StringComparison.OrdinalIgnoreCase)>0)))
             {
                 return s.Substring(1);
             }

src/EPPlusTest/Issues.cs

@@ -2763,6 +2763,22 @@ public void Issue520_2()
                 SaveAndCleanup(p);
             }
         }
+        [TestMethod]
+        public void Issue522()
+        {
+            using (var package = OpenPackage("I22.xlsx", true))
+            {
+
+                ExcelWorksheet worksheet = package.Workbook.Worksheets.Add("Sheet1");
+
+                worksheet.Cells[1, 1].Value = -1234;
+                worksheet.Cells[1, 1].Style.Numberformat.Format = "#.##0\"*\";(#.##0)\"*\"";
+                var s = worksheet.Cells[1, 1].Text;
+
+                SaveAndCleanup(package);
+            }
+        }
+
     }
 }