要素が削除されること ‣
Error: expected { '0': <ul></ul>, length: 1 } to equal null
at Assertion.assert (http://hokaccha.github.io/slides/javascript_design_and_test/demo/lib/expect.js:99:13)
at Assertion.be.Assertion.equal (http://hokaccha.github.io/slides/javascript_design_and_test/demo/lib/expect.js:200:10)
at Assertion.<computed> [as be] (http://hokaccha.github.io/slides/javascript_design_and_test/demo/lib/expect.js:73:24)
at Context.<anonymous> (http://hokaccha.github.io/slides/javascript_design_and_test/demo/test_sinon/tests_1.js:10:31)
at Runnable.run (http://hokaccha.github.io/slides/javascript_design_and_test/demo/lib/mocha.js:4047:32)
at Runner.runTest (http://hokaccha.github.io/slides/javascript_design_and_test/demo/lib/mocha.js:4404:10)
at http://hokaccha.github.io/slides/javascript_design_and_test/demo/lib/mocha.js:4450:12
at next (http://hokaccha.github.io/slides/javascript_design_and_test/demo/lib/mocha.js:4330:14)
at http://hokaccha.github.io/slides/javascript_design_and_test/demo/lib/mocha.js:4339:7
at next (http://hokaccha.github.io/slides/javascript_design_and_test/demo/lib/mocha.js:4287:23)
listView.remove();
expect(listView.$el).to.be(null);