Being a newbie rails developer, there are a number of rails caveats that I wish I knew beforehand, such as this one:

Suppose I have a div with id = “test” and I have a controller function that removes the div using

page[:test].remove

Now suppose I have a functional test as such:

assert_select_rjs :remove, "test"

Well, it happens to be so that this test fails, even though all my other assert_select_rjs assertions succeed. Only when the first argument is :remove does the test fail.

Now I don’t know why this is (anybody want to enlighten me?), but I’ve found a workaround.

Instead of the the code above, do:

assert_equal @response.body, '$("test").remove();'

The assert_select_rjs function supposedly does a similar thing under the hood where it does a regex comparison on the response body.

And there you have it. Test success!