[tests] a couple of assertions on Java module PSI

java/java-tests/testSrc/com/intellij/psi/ClsPsiTest.java

@@ -427,6 +427,7 @@ public class ClsPsiTest extends LightIdeaTestCase {
   public void testModuleInfo() {
     PsiJavaFile file = getFile("../../stubBuilder/module-info");
     assertEquals(LanguageLevel.JDK_1_9, file.getLanguageLevel());
+    assertEquals("", file.getPackageName());
 
     PsiJavaModule module = file.getModuleDeclaration();
     assertNotNull(module);

java/java-tests/testSrc/com/intellij/psi/JavaPsiTest.groovy

@@ -27,7 +27,9 @@ class JavaPsiTest extends LightCodeInsightFixtureTestCase {
   }
 
   void testModuleInfo() {
-    def module = configureFile("module M { }").moduleDeclaration
+    def file = configureFile("module M { }")
+    assert file.packageName == ""
+    def module = file.moduleDeclaration
     assert module != null
     assert module.name == "M"
     assert module.modifierList != null