Tests: Add UnitTests folder

Tests/UnitTests/DocumentTests/Utils.cs

@@ -0,0 +1,29 @@
+using Elwig.Documents;
+using NReco.PdfRenderer;
+using System.Text.RegularExpressions;
+
+namespace Tests.UnitTests.DocumentTests {
+    public static class Utils {
+
+        private static readonly string FileName = Path.Combine(Path.GetTempPath(), "test_document.pdf");
+
+        public static async Task<string> GeneratePdfText(Document doc, bool preserveLayout = false) {
+            await doc.Generate();
+            try {
+                doc.SaveTo(FileName);
+                var conv = new PdfToTextConverter { CustomArgs = preserveLayout ? "-layout " : "-raw " };
+                return conv.GenerateText(FileName);
+            } finally {
+                File.Delete(FileName);
+            }
+        }
+
+        public static string[][] ExtractTable(string text) {
+            return text.Split('\n')
+                .Select(row => Regex.Split(row, @"\s{2,}").Select(c => c.Trim()).Where(c => c.Length > 0).ToArray())
+                .Where(row => row.Length >= 3)
+                .Skip(1)
+                .ToArray();
+        }
+    }
+}