R: Expectation: does the object have vctr properties?

expect_vector {testthat} | R Documentation

## Expectation: does the object have vctr properties?

### Description

`expect_vector()` is a thin wrapper around `vctrs::vec_assert()`, converting the results of that function in to the expectations used by testthat. This means that it used the vctrs of `ptype` (prototype) and `size`. See details in https://vctrs.r-lib.org/articles/type-size.html

### Usage

    expect_vector(object, ptype = NULL, size = NULL)

### Arguments

`object` | Object to test. Supports limited unquoting to make it easier to generate readable failures within a function or for loop. See quasi_label for more details.
`ptype` | (Optional) Vector prototype to test against. Should be a size-0 (empty) generalised vector.
`size` | (Optional) Size to check for.

### Examples

    if (requireNamespace("vctrs") && packageVersion("vctrs") > "0.1.0.9002") {
    expect_vector(1:10, ptype = integer(), size = 10)
    show_failure(expect_vector(1:10, ptype = integer(), size = 5))
    show_failure(expect_vector(1:10, ptype = character(), size = 5))
    }

[Package testthat version 2.2.1 Index]