PC-1029-anchors-containing-square-brackets-in-content-lead-to-errors-with-classic-editor

packages/yoastseo/spec/languageProcessing/helpers/word/markWordsInSentenceSpec.js

@@ -168,4 +168,34 @@ describe( "test the deconstructAnchor and reconstructAnchor helper", () => {
 		const reconstructedAnchor = reConstructAnchor( deconstructedAnchor.openTag, deconstructedAnchor.content );
 		expect( reconstructedAnchor ).toEqual( testAnchor );
 	} );
+
+	it( "correctly deconstructs and reconstructs an anchor if does not contain content", () => {
+		// Unrealistic Scenario. But protects against the bug that is solved in this PR:
+		// https://github.com/Yoast/wordpress-seo/pull/19373
+		const testAnchor = "<a href=\"https://yoast.com\"></a>";
+		const deconstructedAnchor = deConstructAnchor( testAnchor );
+
+		expect( deconstructedAnchor ).toEqual( {
+			openTag: "<a href=\"https://yoast.com\">",
+			content: "",
+		} );
+
+		const reconstructedAnchor = reConstructAnchor( deconstructedAnchor.openTag, deconstructedAnchor.content );
+		expect( reconstructedAnchor ).toEqual( testAnchor );
+	} );
+
+	it( "correctly deconstructs and reconstructs an anchor if content contains a newline", () => {
+		// Unrealistic Scenario. But protects against the bug that is solved in this PR:
+		// https://github.com/Yoast/wordpress-seo/pull/19373
+		const testAnchor = "<a href=\"https://yoast.com\">This is a line.\nAnd this is a line.</a>";
+		const deconstructedAnchor = deConstructAnchor( testAnchor );
+
+		expect( deconstructedAnchor ).toEqual( {
+			openTag: "<a href=\"https://yoast.com\">",
+			content: "This is a line.\nAnd this is a line.",
+		} );
+
+		const reconstructedAnchor = reConstructAnchor( deconstructedAnchor.openTag, deconstructedAnchor.content );
+		expect( reconstructedAnchor ).toEqual( testAnchor );
+	} );
 } );

packages/yoastseo/src/languageProcessing/helpers/word/markWordsInSentences.js

@@ -6,7 +6,8 @@ import matchWords from "../match/matchTextWithArray";
 import arrayToRegex from "../regex/createRegexFromArray";
 
 // Regex to deconstruct an anchor into open tag, content and close tag.
-const anchorDeconstructionRegex = /(<a[\s]+[^>]+>)(.+?)(<\/a>)/;
+// [^] matches any character, including newline
+const anchorDeconstructionRegex = /(<a[\s]+[^>]+>)([^]*?)(<\/a>)/;
 
 /**
  * Deconstructs an anchor to the opening tag and the content. The content is the anchor text.
@@ -60,7 +61,6 @@ const getMarkedAnchors = function( sentence, wordsRegex ) {
 		// Create a new anchor tag with a (marked) anchor text.
 		return reConstructAnchor( openTag, markedAnchorText );
 	} );
-
 	return { anchors, markedAnchors };
 };
 
@@ -123,7 +123,6 @@ export function markWordsInSentences( wordsToMark, sentences, locale, matchWordC
 
 	sentences.forEach( function( sentence ) {
 		wordsFoundInSentence = matchWords( sentence, wordsToMark, locale, matchWordCustomHelper ).matches;
-
 		if ( wordsFoundInSentence.length > 0 ) {
 			markings = markings.concat( new Mark( {
 				original: sentence,