test finder: accept potential tests as junit4 doesn't contain features of test until it contains test methods (IDEA-120123)

java/java-impl/src/com/intellij/testIntegration/JavaTestFinder.java

@@ -101,7 +101,7 @@ public class JavaTestFinder implements TestFinder {
     for (String eachName : names) {
       if (pattern.matcher(eachName).matches()) {
         for (PsiClass eachClass : cache.getClassesByName(eachName, scope)) {
-          if (TestFrameworks.getInstance().isTestClass(eachClass)) {
+          if (TestFrameworks.getInstance().isPotentialTestClass(eachClass)) {
             classesWithProximities.add(
                 new Pair<PsiClass, Integer>(eachClass, TestFinderHelper.calcTestNameProximity(klassName, eachName)));
           }

java/java-psi-api/src/com/intellij/codeInsight/TestFrameworks.java

@@ -29,6 +29,7 @@ public abstract class TestFrameworks {
   }
 
   public abstract boolean isTestClass(PsiClass psiClass);
+  public abstract boolean isPotentialTestClass(PsiClass psiClass);
 
   @Nullable
   public abstract PsiMethod findOrCreateSetUpMethod(PsiClass psiClass);

java/java-psi-impl/src/com/intellij/codeInsight/TestFrameworksImpl.java

@@ -42,6 +42,17 @@ public class TestFrameworksImpl extends TestFrameworks {
     return false;
   }
 
+  @Override
+  public boolean isPotentialTestClass(PsiClass psiClass) {
+    final TestFramework[] testFrameworks = Extensions.getExtensions(TestFramework.EXTENSION_NAME);
+    for (TestFramework framework : testFrameworks) {
+      if (framework.isPotentialTestClass(psiClass)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
   @Override
   @Nullable
   public PsiMethod findOrCreateSetUpMethod(final PsiClass psiClass) {