Clarify a sentence on methods (#988)

* Update testing-basics.Rmd * Update testing-basics.Rmd * Update testing-basics.Rmd Co-authored-by: Jennifer (Jenny) Bryan <[email protected]> --------- Co-authored-by: Jennifer (Jenny) Bryan <[email protected]>
hadley · Jun 7, 2023 · b30b63e · b30b63e
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diff --git a/testing-basics.Rmd b/testing-basics.Rmd
@@ -71,7 +71,7 @@ This chapter describes how to test your R package using the testthat package: <h
 
 If you're familiar with frameworks for unit testing in other languages, you should note that there are some fundamental differences with testthat.
 This is because R is, at heart, more a functional programming language than an object-oriented programming language.
-For instance, because R's main object-oriented systems (S3 and S4) are based on generic functions (i.e., methods belong to functions not classes), testing approaches built around objects and methods don't make much sense.
+For instance, because R's main object-oriented systems (S3 and S4) are based on generic functions (i.e., a method implements a generic function for a specific class), testing approaches built around objects and methods don't make much sense.
 
 testthat 3.0.0 (released 2020-10-31) introduced the idea of an **edition** of testthat, specifically the third edition of testthat, which we refer to as testthat 3e.
 An edition is a bundle of behaviors that you have to explicitly choose to use, allowing us to make otherwise backward incompatible changes.