Imported Upstream version 5.0.0.42

Former-commit-id: fd56571888259555122d8a0f58c68838229cea2b

external/cecil/Test/Mono.Cecil.Tests/PortablePdbTests.cs

@@ -352,6 +352,38 @@ namespace Mono.Cecil.Tests {
 			}, symbolReaderProvider: typeof (PortablePdbReaderProvider), symbolWriterProvider: typeof (PortablePdbWriterProvider));
 		}
 
+		[Test]
+		public void RoundTripLargePortablePdb ()
+		{
+			TestModule ("Mono.Android.dll", module => {
+				Assert.IsTrue (module.HasSymbols);
+			}, verify: false, symbolReaderProvider: typeof (PortablePdbReaderProvider), symbolWriterProvider: typeof (PortablePdbWriterProvider));
+		}
+
+		[Test]
+		public void EmptyPortablePdb ()
+		{
+			TestModule ("EmptyPdb.dll", module => {
+				Assert.IsTrue (module.HasSymbols);
+			}, symbolReaderProvider: typeof (PortablePdbReaderProvider), symbolWriterProvider: typeof (PortablePdbWriterProvider));
+		}
+
+		[Test]
+		public void NullClassConstant ()
+		{
+			TestModule ("xattr.dll", module => {
+				var type = module.GetType ("Library");
+				var method = type.GetMethod ("NullXAttributeConstant");
+				var symbol = method.DebugInformation;
+
+				Assert.IsNotNull (symbol);
+				Assert.AreEqual(1, symbol.Scope.Constants.Count);
+
+				var a = symbol.Scope.Constants [0];
+				Assert.AreEqual ("a", a.Name);
+			}, symbolReaderProvider: typeof (PortablePdbReaderProvider), symbolWriterProvider: typeof (PortablePdbWriterProvider));
+		}
+
 		[Test]
 		public void PortablePdbLineInfo  ()
 		{