test for Cls parsing duplicates

java/java-tests/testSrc/com/intellij/JavaTestUtil.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2012 JetBrains s.r.o.
+ * Copyright 2000-2013 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -53,7 +53,7 @@ public class JavaTestUtil {
     });
   }
 
-  private static Sdk getTestJdk() {
+  public static Sdk getTestJdk() {
     try {
       ProjectJdkImpl jdk = (ProjectJdkImpl)JavaAwareProjectJdkTableImpl.getInstanceEx().getInternalJdk().clone();
       jdk.setName("JDK");

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

@@ -0,0 +1,99 @@
+/*
+ * Copyright 2000-2013 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.psi;
+
+import com.intellij.JavaTestUtil;
+import com.intellij.openapi.projectRoots.Sdk;
+import com.intellij.openapi.util.Comparing;
+import com.intellij.openapi.util.text.StringUtil;
+import com.intellij.psi.search.GlobalSearchScope;
+import com.intellij.testFramework.PsiTestCase;
+import com.intellij.usageView.UsageViewLongNameLocation;
+import gnu.trove.THashSet;
+import gnu.trove.TObjectHashingStrategy;
+
+import java.util.Set;
+
+public class ClsDuplicatesTest extends PsiTestCase {
+  @Override
+  protected Sdk getTestProjectJdk() {
+    return JavaTestUtil.getTestJdk();
+  }
+
+  public void testDuplicates() throws Exception {
+    final PsiPackage rootPackage = JavaPsiFacade.getInstance(getProject()).findPackage("");
+    assert rootPackage != null;
+    final GlobalSearchScope scope = GlobalSearchScope.allScope(getProject());
+    JavaRecursiveElementVisitor visitor = new JavaRecursiveElementVisitor() {
+      @Override
+      public void visitPackage(PsiPackage aPackage) {
+        System.out.println(aPackage.getQualifiedName());
+
+        visit(aPackage);
+        for (PsiPackage subPackage : aPackage.getSubPackages(scope)) {
+          visitPackage(subPackage);
+        }
+        for (PsiClass aClass : aPackage.getClasses(scope)) {
+          visitElement(aClass);
+        }
+      }
+
+      @Override
+      public void visitElement(PsiElement element) {
+        if (element instanceof PsiNamedElement) {
+          visit((PsiNamedElement)element);
+        }
+        super.visitElement(element);
+      }
+
+      @Override
+      public void visitClass(PsiClass aClass) {
+        if ("com.sun.xml.internal.bind.v2.runtime.unmarshaller.DomLoader.State".equals(aClass.getQualifiedName())) {
+          int i =0;
+        }
+        super.visitClass(aClass);
+      }
+    };
+    rootPackage.accept(visitor);
+  }
+
+  private final Set<PsiNamedElement> uniques = new THashSet<PsiNamedElement>(new TObjectHashingStrategy<PsiNamedElement>() {
+    @Override
+    public int computeHashCode(PsiNamedElement object) {
+      String name = object.getName();
+      return name == null ? 0 : name.hashCode();
+    }
+
+    @Override
+    public boolean equals(PsiNamedElement o1, PsiNamedElement o2) {
+      boolean eq = o1.getParent() == o2.getParent() && StringUtil.equals(o1.getName(), o2.getName()) && o1.getClass() == o2.getClass()
+                  && Comparing.equal(o1.getText(), o2.getText());
+
+      if (eq) {
+        return true;
+      }
+      else {
+        return false;
+      }
+    }
+  });
+
+  private void visit(PsiNamedElement element) {
+    if (!uniques.add(element)) {
+      fail("Duplicate Element: "+ElementDescriptionUtil.getElementDescription(element, UsageViewLongNameLocation.INSTANCE)+": "+element.getText() );
+    }
+  }
+}