Nothing
factor() is an S3 object
A() is an S4 object
C() inherits from 'C'/'A'/'B'/'list'/'vector' not 'D'.
`x` inherits from 'a'/'b' not 'c'.
`x` inherits from 'a'/'b' not 'c'/'d'.
Code
expect_s7_class(1, 1)
Condition
Error in `expect_s7_class()`:
! `class` must be an S7 class object, not the number 1.
Foo() inherits from <Foo> not <Bar>.
Baz() inherits from <Baz>/<Foo> not <Bar>.
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