expect_is

<a href="https://lifecycle.r-lib.org/articles/stages.html#superseded"><img src="figures/lifecycle-superseded.svg?package=testthat&version=3.1.10" alt="[Superseded]"></a>
<code>expect_is()</code> is an older form that uses <code><a href="/link/inherits()?package=testthat&version=3.1.10" data-mini-rdoc="testthat::inherits()">inherits()</a></code> without checking
whether <code>x</code> is S3, S4, or neither. Instead, I'd recommend using
<code>expect_type()</code>, <code>expect_s3_class()</code> or <code>expect_s4_class()</code> to more clearly
convey your intent.

internal

Software testing is important, but, in part because it is
frustrating and boring, many of us avoid it. 'testthat' is a testing
framework for R that is easy to learn and use, and integrates with
your existing 'workflow'.

Hadley Wickham

testthat

Unit Testing for R

Posit Software, PBC 

R Core team 

expect_is function

<dl><dt>object</dt>
<dd>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.</dd>
<dt>class</dt>
<dd>Either a character vector of class names, or
for <code>expect_s3_class()</code> and <code>expect_s4_class()</code>, an <code>NA</code> to assert
that <code>object</code> isn't an S3 or S4 object.</dd></dl>

Arguments

<a href="https://lifecycle.r-lib.org/articles/stages.html#deprecated"><img src="figures/lifecycle-deprecated.svg?package=testthat&version=3.1.10" alt="[Deprecated]"></a>
<code>expect_is()</code> is formally deprecated in the 3rd edition.

3rd edition

<a href='https://lifecycle.r-lib.org/articles/stages.html#superseded'><img src='figures/lifecycle-superseded.svg' alt='[Superseded]' /></a>
<code>expect_is()</code> is an older form that uses <code><a href='https://rdrr.io/r/base/class.html'>inherits()</a></code> without checking
whether <code>x</code> is S3, S4, or neither. Instead, I'd recommend using
<code>expect_type()</code>, <code>expect_s3_class()</code> or <code>expect_s4_class()</code> to more clearly
convey your intent.

Does an object inherit from a given class? — expect_is

<dl>

<dt>object</dt>
<dd>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.</dd>


<dt>class</dt>
<dd>Either a character vector of class names, or
for <code>expect_s3_class()</code> and <code>expect_s4_class()</code>, an <code>NA</code> to assert
that <code>object</code> isn't an S3 or S4 object.</dd>

</dl>

<a href='https://lifecycle.r-lib.org/articles/stages.html#deprecated'><img src='figures/lifecycle-deprecated.svg' alt='[Deprecated]' /></a>
<code>expect_is()</code> is formally deprecated in the 3rd edition.

expect_is: Does an object inherit from a given class?

Description

Usage

Arguments

3rd edition