chore(check if compareKeys is function)

jestjs · Oct 24, 2021 · 2feb474 · 2feb474
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diff --git a/packages/jest-diff/README.md b/packages/jest-diff/README.md
@@ -401,6 +401,7 @@ For other applications, you can provide an options object as a third argument:
 | `includeChangeCounts`             | `false`            |
 | `omitAnnotationLines`             | `false`            |
 | `patchColor`                      | `chalk.yellow`     |
+
 For more information about the options, see the following examples.
 
 ### Example of options for labels

diff --git a/packages/pretty-format/src/index.ts b/packages/pretty-format/src/index.ts
@@ -487,7 +487,7 @@ const getConfig = (options?: OptionsReceived): Config => ({
       ? getColorsHighlight(options)
       : getColorsEmpty(),
   compareKeys:
-    options && options.compareKeys !== undefined
+    options && typeof options.compareKeys === 'function'
       ? options.compareKeys
       : DEFAULT_OPTIONS.compareKeys,
   escapeRegex: getEscapeRegex(options),