Fix unit tests

ICSharpCode.Decompiler.Tests/Helpers/Tester.cs

@@ -302,6 +302,7 @@ namespace ICSharpCode.Decompiler.Tests.Helpers
 				// disable C# features not available in legacy compiler
 				settings.NullPropagation = false;
 				settings.StringInterpolation = false;
+				settings.UseExpressionBodyForCalculatedGetterOnlyProperties = false;
 			}
 			return settings;
 		}

ICSharpCode.Decompiler.Tests/PrettyTestRunner.cs

@@ -255,17 +255,17 @@ namespace ICSharpCode.Decompiler.Tests
 			RunForLibrary(cscOptions: cscOptions);
 		}
 
-		void RunForLibrary([CallerMemberName] string testName = null, AssemblerOptions asmOptions = AssemblerOptions.None, CSharpCompilerOptions cscOptions = CSharpCompilerOptions.None, DecompilerSettings decompilerSettings = null)
-		{
-			Run(testName, asmOptions | AssemblerOptions.Library, cscOptions | CSharpCompilerOptions.Library, decompilerSettings);
-		}
-
 		[Test]
 		public void CS6_StringInterpolation([ValueSource("roslynOnlyOptions")] CSharpCompilerOptions cscOptions)
 		{
 			Run(cscOptions: cscOptions);
 		}
 
+		void RunForLibrary([CallerMemberName] string testName = null, AssemblerOptions asmOptions = AssemblerOptions.None, CSharpCompilerOptions cscOptions = CSharpCompilerOptions.None, DecompilerSettings decompilerSettings = null)
+		{
+			Run(testName, asmOptions | AssemblerOptions.Library, cscOptions | CSharpCompilerOptions.Library, decompilerSettings);
+		}
+
 		void Run([CallerMemberName] string testName = null, AssemblerOptions asmOptions = AssemblerOptions.None, CSharpCompilerOptions cscOptions = CSharpCompilerOptions.None, DecompilerSettings decompilerSettings = null)
 		{
 			var ilFile = Path.Combine(TestCasePath, testName) + Tester.GetSuffix(cscOptions) + ".il";

ICSharpCode.Decompiler.Tests/TestCases/Pretty/ExpressionTrees.cs

@@ -699,22 +699,30 @@ namespace ICSharpCode.Decompiler.Tests.TestCases.Pretty
 
 		public int Field = 3;
 
+#if LEGACY_CSC
 		public static int StaticReadonlyProperty {
 			get {
 				return 0;
 			}
 		}
+#else
+		public static int StaticReadonlyProperty => 0;
+#endif
 
 		public static int StaticProperty {
 			get;
 			set;
 		}
 
+#if LEGACY_CSC
 		public int ReadonlyProperty {
 			get {
 				return 0;
 			}
 		}
+#else
+		public int ReadonlyProperty => 0;
+#endif
 
 		public int Property {
 			get;

ICSharpCode.Decompiler.Tests/TestCases/Pretty/NullPropagation.cs

@@ -32,16 +32,8 @@ namespace ICSharpCode.Decompiler.Tests.TestCases.Pretty
 		{
 			public int IntVal;
 			public MyClass Field;
-			public MyStruct? Property1 {
-				get {
-					return null;
-				}
-			}
-			public MyStruct Property2 {
-				get {
-					return default(MyStruct);
-				}
-			}
+			public MyStruct? Property1 => null;
+			public MyStruct Property2 => default(MyStruct);
 			public MyStruct? this[int index] {
 				get {
 					return null;

ICSharpCode.Decompiler.Tests/TestCases/Pretty/UnsafeCode.cs

@@ -58,11 +58,15 @@ namespace ICSharpCode.Decompiler.Tests.TestCases.Pretty
 		private UnsafeDelegate unsafeDelegate;
 		private static UnsafeDelegate staticUnsafeDelegate;
 
+#if LEGACY_CSC
 		public unsafe int* NullPointer {
 			get {
 				return null;
 			}
 		}
+#else
+		public unsafe int* NullPointer => null;
+#endif
 
 		unsafe static UnsafeCode()
 		{