unittest for staticvar (#65)

* shift for bigint

* unittest for static var.

without jsonconfig.

* Fix tests

tests/Neo.Compiler.MSIL.UnitTests/TestClasses/Contract_StaticVar.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Neo.Compiler.MSIL.TestClasses
+{
+
+    class Contract_staticvar : SmartContract.Framework.SmartContract
+    {
+        static int a1 = 1;
+
+        public static object Main(string method, object[] args)
+        {
+            testadd();
+            testmulti();
+            return a1;
+        }
+
+        static void testadd()
+        {
+            a1 += 5;
+        }
+        static void testmulti()
+        {
+            a1 *= 7;
+        }
+    }
+
+}

tests/Neo.Compiler.MSIL.UnitTests/UnitTest_StaticVar.cs

@@ -0,0 +1,25 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Neo.Compiler.MSIL.Utils;
+using Neo.VM;
+
+namespace Neo.Compiler.MSIL
+{
+    [TestClass]
+    public class UnitTest_StaticVar
+    {
+        [TestMethod]
+        public void Test_StaticVar()
+        {
+            var testengine = new TestEngine();
+            testengine.AddEntryScript("./TestClasses/Contract_StaticVar.cs");
+            StackItem[] _params = new StackItem[] { "testfunc", new StackItem[0] };
+            var result = testengine.ExecuteTestCase(_params);
+
+            //test (1+5)*7 == 42
+            StackItem wantresult = 42;
+            var bequal = wantresult.Equals(result.Pop());
+            Assert.IsTrue(bequal);
+        }
+
+    }
+}