How to check if an element is not clickable with Protractor?

I have found a solution that works for this. As click() returns a promise you can simply .then off of it and throw in the successful click handler and override the catch handler to do nothing which makes the test pass if the element is not clickable.

return this.shouldSeeDisabledFunds()
    .then(function() {
        fundsElem.first().click()
            .then(
                function() {
                    throw "Can click Funds element that should be disabled";
                },
                function() {}
            )
        ;
    })
;

Maybe not applicable in your case, but a better way to check if an element is clickable is checking if it is both visible and enabled: elem.isDisplayed() and elem.isEnabled(). This way you don't accidentally click on buttons when you're not supposed to.

Fyi, there will be a library coming to help with cases like this: https://github.com/angular/protractor/pull/1703