Fixed testExportAsModsAndThenImportAsMods (#4369)

* Fixed testExportAsModsAndThenImportAsMods

* Fixed indentation

* Fixed indentation

Author: NivedhaSunderraj

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

@@ -1,5 +1,8 @@
 package org.jabref.logic.exporter;
 
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.mockito.Mockito.mock;
+
 import java.nio.charset.Charset;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
@@ -16,23 +19,20 @@
 import org.jabref.model.database.BibDatabaseContext;
 import org.jabref.model.entry.BibEntry;
 import org.jabref.model.util.DummyFileUpdateMonitor;
-
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.MethodSource;
 import org.junitpioneer.jupiter.TempDirectory;
 import org.mockito.Answers;
+import org.mockito.Mockito;
 import org.xmlunit.builder.Input;
 import org.xmlunit.builder.Input.Builder;
 import org.xmlunit.diff.DefaultNodeMatcher;
 import org.xmlunit.diff.ElementSelectors;
 import org.xmlunit.matchers.CompareMatcher;
 
-import static org.hamcrest.MatcherAssert.assertThat;
-import static org.mockito.Mockito.mock;
-
 @ExtendWith(TempDirectory.class)
 public class ModsExportFormatTestFiles {
 
@@ -65,8 +65,10 @@ public void setUp(@TempDirectory.TempDir Path testFolder) throws Exception {
         Path path = testFolder.resolve("ARandomlyNamedFile.tmp");
         Files.createFile(path);
         tempFile = path.toAbsolutePath();
-        bibtexImporter = new BibtexImporter(mock(ImportFormatPreferences.class, Answers.RETURNS_DEEP_STUBS), new DummyFileUpdateMonitor());
-        modsImporter = new ModsImporter(mock(ImportFormatPreferences.class, Answers.RETURNS_DEEP_STUBS));
+        ImportFormatPreferences mock = mock(ImportFormatPreferences.class, Answers.RETURNS_DEEP_STUBS);
+        bibtexImporter = new BibtexImporter(mock, new DummyFileUpdateMonitor());
+        Mockito.when(mock.getKeywordSeparator()).thenReturn(',');
+        modsImporter = new ModsImporter(mock);
     }
 
     @Disabled
@@ -78,17 +80,16 @@ public final void testPerformExport(String filename) throws Exception {
         Path tempFilename = tempFile.toAbsolutePath();
         List<BibEntry> entries = bibtexImporter.importDatabase(importFile, charset).getDatabase().getEntries();
         Path xmlFile = Paths.get(ModsExportFormatTestFiles.class.getResource(xmlFileName).toURI());
-
+       
         modsExportFormat.export(databaseContext, tempFile, charset, entries);
 
         Builder control = Input.from(Files.newInputStream(xmlFile));
         Builder test = Input.from(Files.newInputStream(tempFilename));
-
         assertThat(test, CompareMatcher.isSimilarTo(control)
                 .withNodeMatcher(new DefaultNodeMatcher(ElementSelectors.byNameAndText)).throwComparisonFailure());
     }
 
-    @Disabled
+    
     @ParameterizedTest
     @MethodSource("fileNames")
     public final void testExportAsModsAndThenImportAsMods(String filename) throws Exception {