Get unit tests running again

Author: ultraq

org.thymeleaf.extras.eclipse.contentassist/pom.xml

@@ -17,6 +17,15 @@
 		<relativePath>../pom.xml</relativePath>
 	</parent>
 
+	<dependencies>
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-engine</artifactId>
+			<version>5.9.2</version>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
 	<build>
 		<plugins>
 			<plugin>

org.thymeleaf.extras.eclipse.contentassist/src/test/groovy/org/thymeleaf/extras/eclipse/autocomplete/generators/AttributeProcessorProposalGeneratorTests.groovy

@@ -120,7 +120,9 @@ class AttributeProcessorProposalGeneratorTests {
 		def html = '<p xmlns:th="http://www.thymeleaf.org" >Hi!</p>'
 		def document = DOMBuilder.newInstance().parseText(html)
 
-		def results = attributeProcessorProposalGenerator.generate(document.firstChild, mock(ITextRegion),
+		// Have to use .getFirstChild() as isFirstChild is an internal method in the
+		// Apache Xerces implementation of Document 🙃
+		def results = attributeProcessorProposalGenerator.generate(document.getFirstChild(), mock(ITextRegion),
 			mock(IStructuredDocumentRegion), createDocument(html), 39)
 		assertEquals(
 			[ 'plugin:test1', 'plugin:test2', 'data-plugin-test1', 'data-plugin-test2' ],