Restructure test

test/Bounty.js

 contract('Bounty', function(accounts) {
   it("can create bounty contract with factory address", function(done){
     var target = SecureTargetMock.deployed();
+
     SimpleTokenBounty.new(target.address).
       then(function(bounty){
         return bounty.factoryAddress.call()
@@ -11,9 +12,12 @@ contract('Bounty', function(accounts) {
       then(done);
   })
 
-  it("can call checkInvariant for SecureTargetMock", function(done){
-    var bounty;
-    var targetFactory = SecureTargetFactory.deployed();
+  describe("SecureTargetMock", function(){
+    before(function(){
+      targetFactory = SecureTargetFactory.deployed();
+    })
+
+    it("checkInvariant returns true", function(done){
       SimpleTokenBounty.new(targetFactory.address).
         then(function(_bounty) {
           bounty = _bounty;
@@ -27,10 +31,14 @@ contract('Bounty', function(accounts) {
         }).
         then(done);
     })
+  })
 
-  it("can call checkInvariant for InsecureTargetMock", function(done){
-    var bounty;
-    var targetFactory = InsecureTargetFactory.deployed();
+  describe("InsecureTargetMock", function(){
+    before(function(){
+      targetFactory = InsecureTargetFactory.deployed();
+    })
+
+    it("checkInvariant returns false", function(done){
       SimpleTokenBounty.new(targetFactory.address).
         then(function(_bounty) {
           bounty = _bounty;
@@ -44,4 +52,5 @@ contract('Bounty', function(accounts) {
         }).
         then(done);
     })
+  })
 });