Add some unit tests for stubTracker

spec/stubTrackerSpec.js

@@ -0,0 +1,61 @@
+describe('StubTracker', function() {
+  beforeEach(function() {
+    var Constructor = getJasmineRequireObj().AjaxStubTracker();
+    this.tracker = new Constructor();
+  });
+
+  it('finds nothing if no stubs are added', function() {
+    expect(this.tracker.findStub()).toBeUndefined();
+  });
+
+  it('finds an added stub', function() {
+    var stub = { matches: function() { return true; } };
+    this.tracker.addStub(stub);
+
+    expect(this.tracker.findStub()).toBe(stub);
+  });
+
+  it('skips an added stub that does not match', function() {
+    var stub = { matches: function() { return false; } };
+    this.tracker.addStub(stub);
+
+    expect(this.tracker.findStub()).toBeUndefined();
+  });
+
+  it('passes url, data, and method to the stub', function() {
+    var stub = { matches: jasmine.createSpy('matches') };
+    this.tracker.addStub(stub);
+
+    this.tracker.findStub('url', 'data', 'method');
+
+    expect(stub.matches).toHaveBeenCalledWith('url', 'data', 'method');
+  });
+
+  it('can clear out all stubs', function() {
+    var stub = { matches: jasmine.createSpy('matches') };
+    this.tracker.addStub(stub);
+
+    this.tracker.findStub();
+
+    expect(stub.matches).toHaveBeenCalled();
+
+    this.tracker.reset();
+    stub.matches.calls.reset();
+
+    this.tracker.findStub();
+
+    expect(stub.matches).not.toHaveBeenCalled();
+  });
+
+  it('uses the most recently added stub that matches', function() {
+    var stub1 = { matches: function() { return true; } };
+    var stub2 = { matches: function() { return true; } };
+    var stub3 = { matches: function() { return false; } };
+
+    this.tracker.addStub(stub1);
+    this.tracker.addStub(stub2);
+    this.tracker.addStub(stub3);
+
+    expect(this.tracker.findStub()).toBe(stub2);
+  });
+});