Vue-test-utils: Rename shallow to shallowMount

[chrisvfritz]

As discussed with @eddyerburgh, I've had to explain to a lot of people that shallow _does_ actually mount, it's just a shallow mount. 😄 This rename would make that clearer.

[eddyerburgh]

I prefer shallow because it's more terse, but I'm used to the enzyme API which has a shallow method.

It seems a lot of people are confused by shallow, so I'm in favor of renaming the method to shallowMount

[lmiller1990]

Another potentially less confusing alternative could be a shallow option:

const wrapper = mount(Component, {
  shallow: true
})

Although I don't have a strong opinion either way.

[FernandoBasso]

Since VTU is about unit testing, and that more or less means one does not mount/test child components, what about mount defaulting to "shallow" and then allowing the user set it to true when they need, like @lmiller1990's approach?

I understand that perhaps people would complain "hey, my components do not get properly mounted" if they don't see child components mounted as well and didn't read the docs about shallow/non-shallow.

Anyway, that is another idea that may or may not work.

[chrisvfritz]

I think the shallow option could be OK, except it's such a big change in behavior that I'd worry it could get lost with other options.

[eddyerburgh]

My preference is to rename shallow to shallowMount

[lmiller1990]

It's easy enough to set up an alias from for people who prefer shallow, so I'm okay with this.