Rename j$ to jasmineUnderTest for specs

- Clarifies what it is for when writing tests
- No longer named the same as the `jasmine` that is injected into live
  code

spec/core/matchers/toHaveBeenCalledSpec.js

@@ -1,7 +1,7 @@
 describe("toHaveBeenCalled", function() {
   it("passes when the actual was called, with a custom .not fail message", function() {
-    var matcher = j$.matchers.toHaveBeenCalled(),
-      calledSpy = j$.createSpy('called-spy'),
+    var matcher = jasmineUnderTest.matchers.toHaveBeenCalled(),
+      calledSpy = jasmineUnderTest.createSpy('called-spy'),
       result;
 
     calledSpy();
@@ -12,8 +12,8 @@ describe("toHaveBeenCalled", function() {
   });
 
   it("fails when the actual was not called", function() {
-    var matcher = j$.matchers.toHaveBeenCalled(),
-      uncalledSpy = j$.createSpy('uncalled spy'),
+    var matcher = jasmineUnderTest.matchers.toHaveBeenCalled(),
+      uncalledSpy = jasmineUnderTest.createSpy('uncalled spy'),
       result;
 
     result = matcher.compare(uncalledSpy);
@@ -21,22 +21,22 @@ describe("toHaveBeenCalled", function() {
   });
 
   it("throws an exception when the actual is not a spy", function() {
-    var matcher = j$.matchers.toHaveBeenCalled(),
+    var matcher = jasmineUnderTest.matchers.toHaveBeenCalled(),
       fn = function() {};
 
     expect(function() { matcher.compare(fn) }).toThrow(new Error("Expected a spy, but got Function."));
   });
 
   it("throws an exception when invoked with any arguments", function() {
-    var matcher = j$.matchers.toHaveBeenCalled(),
-      spy = j$.createSpy('sample spy');
+    var matcher = jasmineUnderTest.matchers.toHaveBeenCalled(),
+      spy = jasmineUnderTest.createSpy('sample spy');
 
     expect(function() { matcher.compare(spy, 'foo') }).toThrow(new Error("toHaveBeenCalled does not take arguments, use toHaveBeenCalledWith"));
   });
 
   it("has a custom message on failure", function() {
-    var matcher = j$.matchers.toHaveBeenCalled(),
-      spy = j$.createSpy('sample-spy'),
+    var matcher = jasmineUnderTest.matchers.toHaveBeenCalled(),
+      spy = jasmineUnderTest.createSpy('sample-spy'),
       result;
 
     result = matcher.compare(spy);