#6 improve organisation of cff related classes. add failing font test for cff font file. fix bugs with cff parsing

src/UglyToad.PdfPig.Tests/Fonts/CompactFontFormat/CompactFontFormatParserTests.cs

@@ -0,0 +1,41 @@
+namespace UglyToad.PdfPig.Tests.Fonts.CompactFontFormat
+{
+    using System;
+    using System.IO;
+    using System.Linq;
+    using PdfPig.Fonts.CompactFontFormat;
+    using PdfPig.Fonts.CompactFontFormat.Dictionaries;
+    using Xunit;
+
+    public class CompactFontFormatParserTests
+    {
+        private readonly CompactFontFormatParser parser = new CompactFontFormatParser(new CompactFontFormatIndividualFontParser(
+                new CompactFontFormatIndexReader(), new CompactFontFormatTopLevelDictionaryReader(), new CompactFontFormatPrivateDictionaryReader()), 
+            new CompactFontFormatIndexReader());
+
+        [Fact]
+        public void CanReadMinionPro()
+        {
+            var fileBytes = GetFileBytes("MinionPro.bin");
+
+            var font = parser.Parse(new CompactFontFormatData(fileBytes));
+
+            Assert.Equal("MinionPro", font.ToString());
+        }
+
+        private static byte[] GetFileBytes(string name)
+        {
+            var documentFolder = Path.GetFullPath(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "..", "..", "..", "Fonts", "CompactFontFormat"));
+            var files = Directory.GetFiles(documentFolder);
+
+            var file = files.FirstOrDefault(x => x.IndexOf(name, StringComparison.OrdinalIgnoreCase) >= 0);
+
+            if (file == null)
+            {
+                throw new InvalidOperationException($"Could not find test file {name} in folder {documentFolder}.");
+            }
+
+            return File.ReadAllBytes(file);
+        }
+    }
+}