Fix ModsExportFormatTestFiles

src/test/java/org/jabref/logic/exporter/ModsExportFormatTestFiles.java

@@ -18,15 +18,18 @@
 import org.jabref.model.util.DummyFileUpdateMonitor;
 
 import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.io.TempDir;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 import org.mockito.Answers;
 import org.mockito.Mockito;
+import org.xmlunit.diff.DefaultNodeMatcher;
+import org.xmlunit.diff.ElementSelectors;
 
+import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.mockito.Mockito.mock;
+import static org.xmlunit.matchers.CompareMatcher.isSimilarTo;
 
 public class ModsExportFormatTestFiles {
 
@@ -66,7 +69,6 @@ public void setUp(@TempDir Path testFolder) throws Exception {
 
  @ParameterizedTest
  @MethodSource("fileNames")
- @Disabled("Ordering of XML elements changed 2019-08-25")
  public final void testPerformExport(String filename) throws Exception {
  importFile = Paths.get(ModsExportFormatTestFiles.class.getResource(filename).toURI());
  String xmlFileName = filename.replace(".bib", ".xml");
@@ -75,9 +77,16 @@ public final void testPerformExport(String filename) throws Exception {
 
  exporter.export(databaseContext, tempFile, charset, entries);
 
- assertEquals(
- String.join("\n", Files.readAllLines(xmlFile)),
- String.join("\n", Files.readAllLines(tempFile)));
+ String expected = String.join("\n", Files.readAllLines(xmlFile));
+ String actual = String.join("\n", Files.readAllLines(tempFile));
+
+ // The order of elements changes from Windows to Travis environment somehow
+ // The order does not really matter, so we ignore it.
+ // Source: https://stackoverflow.com/a/16540679/873282
+ assertThat(expected, isSimilarTo(expected)
+ .ignoreWhitespace()
+ .normalizeWhitespace()
+ .withNodeMatcher(new DefaultNodeMatcher(ElementSelectors.byNameAndText)));
  }
 
  @ParameterizedTest