shallowMount can't handle vuetify's "dynamic slot"

[hereiscasio]

Subject of the issue

Actually,
shallowMount already do a great job to handle majority of v-slot usages
BUT,
it can't handle the more advance one,
which is called "dynamic slot" in vuetify official doc

let me clarify the problems,
shallowMount can handle below cases very well:

• CASE_A：v-slot
• CASE_B：v-slot:namedSlot
• CASE_C：v-slot:scopedSlot="{ someProp }"

but it can't handle v-slot like:

• CASE_D：v-slot:item.calories="{ item }"

and what i mean of "it can't handle" is that

i don't need to set stubs API in mounting options for CASE A ~ C
and it just works perfect.

but if i don't set stubs for CASE D, it will fail

Steps to reproduce

u can test this example by using shallowMount
in my case, after executing shallowMount
i will use expect(wrapper.element).toMatchSnapshot()

Expected behaviour

works without problems, just like CASE A ~ C

Actual behaviour

it will say something like "item is undefined" in the case i presented in "Steps to reproduce"

[ebisbe]

#1564 (comment)