add test around conditional prompt show logic

tests/bootbox.test.js

@@ -16,12 +16,6 @@ describe("Bootbox", function() {
     expect(bootbox.hideAll).to.be.a("function");
   });
 
-  // @TODO reimplement
-  xit("starts with no dialogs in the DOM", function() {
-    expect($(".bootbox").length).to.equal(0);
-  });
-
-  // @TODO reimplement
   describe("hideAll", function() {
     beforeEach(function() {
       this.hidden = sinon.spy($.fn, "modal");

tests/prompt.test.coffee

@@ -143,16 +143,21 @@ describe "bootbox.prompt", ->
         expect(@button.text()).to.equal "Custom prompt"
         expect(@button.hasClass("btn-warning")).to.be.true
 
-    # @FIXME even if false, our tests always report dialog.is(":visible") true
-    # even though a browser does not (as you'd expect)
-    xdescribe "setting show to false", ->
+    describe "setting show to false", ->
       beforeEach ->
-        @options.show = false
+        @options.show = true
+
+        @shown = sinon.spy()
+
+        sinon.stub bootbox, "dialog", =>
+          on: ->
+          off: ->
+          modal: @shown
 
         @create()
 
       it "does not show the dialog", ->
-        expect(@dialog.is(":visible")).to.be.false
+        expect(@shown).not.to.have.been.called
 
   describe "callback tests", ->
     describe "with a simple callback", ->