Fixed hexpression example

tests/HInterfaceTest.hx

@@ -4,13 +4,14 @@ import utest.Test;
 import utest.Assert;
 
 import hank.HInterface;
+import hank.ViewCounts;
 
 class HInterfaceTest extends utest.Test {
 
     var hInterface: HInterface;
 
     public function setup() {
-        hInterface = new HInterface();
+        hInterface = new HInterface(new ViewCounts([]));
     }
 
     function assertVar(name: String, value: Dynamic) {
@@ -20,6 +21,8 @@ class HInterfaceTest extends utest.Test {
     public function testVarDeclaration() {
         hInterface.runEmbeddedHaxe('var test = "str"');
         assertVar('test', 'str');
+        hInterface.runEmbeddedHaxe('var test2 = 2');
+        assertVar('test2', 2);
     }
 
     public function testBoolification() {