classlib: fix issues in EnumSet and EnumMap (#834)

classlib/src/main/java/org/teavm/classlib/java/util/TAbstractCollection.java

@@ -107,6 +107,7 @@ public abstract class TAbstractCollection<E> extends TObject implements TCollect
 
     @Override
     public boolean removeAll(TCollection<?> c) {
+        TObjects.requireNonNull(c);
         boolean changed = false;
         for (TIterator<E> iter = iterator(); iter.hasNext();) {
             E e = iter.next();
@@ -120,6 +121,7 @@ public abstract class TAbstractCollection<E> extends TObject implements TCollect
 
     @Override
     public boolean retainAll(TCollection<?> c) {
+        TObjects.requireNonNull(c);
         boolean changed = false;
         for (TIterator<E> iter = iterator(); iter.hasNext();) {
             E e = iter.next();

classlib/src/main/java/org/teavm/classlib/java/util/TEnumMap.java

@@ -16,21 +16,16 @@
 package org.teavm.classlib.java.util;
 
 import java.io.Serializable;
-import java.util.AbstractMap;
-import java.util.AbstractSet;
 import java.util.Arrays;
-import java.util.Iterator;
+import org.teavm.classlib.java.lang.TCloneNotSupportedException;
-import java.util.Map;
+import org.teavm.interop.Rename;
-import java.util.NoSuchElementException;
-import java.util.Objects;
-import java.util.Set;
 
-public class TEnumMap<K extends Enum<K>, V> extends AbstractMap<K, V> implements Serializable, Cloneable {
+public class TEnumMap<K extends Enum<K>, V> extends TAbstractMap<K, V> implements Serializable, Cloneable {
     private Class<K> keyType;
     private Object[] data;
     private boolean[] provided;
     private int size;
-    private Set<Entry<K, V>> entrySet;
+    private TSet<Entry<K, V>> entrySet;
 
     public TEnumMap(Class<K> keyType) {
         initFromKeyType(keyType);
@@ -40,16 +35,24 @@ public class TEnumMap<K extends Enum<K>, V> extends AbstractMap<K, V> implements
         initFromOtherEnumMap(m);
     }
 
-    public TEnumMap(Map<K, V> m) {
+    public TEnumMap(TMap<K, V> m) {
         if (m instanceof TEnumMap) {
             initFromOtherEnumMap((TEnumMap<K, V>) m);
         } else {
             if (m.isEmpty()) {
                 throw new IllegalArgumentException();
             }
-            initFromKeyType(m.keySet().iterator().next().getDeclaringClass());
+            for (TIterator<? extends TMap.Entry<K, V>> it = m.entrySet().iterator(); it.hasNext();) {
-            for (Entry<K, V> entry : m.entrySet()) {
+                TMap.Entry<K, V> entry = it.next();
-                int index = entry.getKey().ordinal();
+                K key = entry.getKey();
+                if (keyType == null) {
+                    initFromKeyType(key.getDeclaringClass());
+                }
+                Class<?> cls = key.getClass();
+                if (cls != keyType && cls.getSuperclass() != keyType) {
+                    throw new ClassCastException();
+                }
+                int index = key.ordinal();
                 provided[index] = true;
                 data[index] = entry.getValue();
             }
@@ -78,7 +81,7 @@ public class TEnumMap<K extends Enum<K>, V> extends AbstractMap<K, V> implements
     @Override
     public boolean containsValue(Object value) {
         for (int i = 0; i < data.length; ++i) {
-            if (provided[i] && Objects.equals(value, data[i])) {
+            if (provided[i] && TObjects.equals(value, data[i])) {
                 return true;
             }
         }
@@ -107,6 +110,10 @@ public class TEnumMap<K extends Enum<K>, V> extends AbstractMap<K, V> implements
 
     @Override
     public V put(K key, V value) {
+        Class<?> cls = key.getClass();
+        if (cls != keyType && cls.getSuperclass() != keyType) {
+            throw new ClassCastException();
+        }
         int index = key.ordinal();
         @SuppressWarnings("unchecked")
         V old = (V) data[index];
@@ -135,14 +142,24 @@ public class TEnumMap<K extends Enum<K>, V> extends AbstractMap<K, V> implements
     }
 
     @Override
-    public void putAll(Map<? extends K, ? extends V> m) {
+    @SuppressWarnings("unchecked")
-        for (Map.Entry<? extends K, ? extends V> entry : m.entrySet()) {
+    public void putAll(TMap<? extends K, ? extends V> m) {
-            int index = entry.getKey().ordinal();
+        if (m instanceof TEnumMap) {
-            if (!provided[index]) {
+            TEnumMap<K, V> em = (TEnumMap<K, V>) m;
-                provided[index] = true;
+            if (!em.isEmpty() && this.keyType != em.keyType) {
+                throw new ClassCastException(em.keyType + " != " + keyType);
+            }
+            for (int i = 0; i < data.length; i++) {
+                if (em.provided[i]) {
+                    this.data[i] = em.data[i];
+                    if (!this.provided[i]) {
+                        this.provided[i] = true;
                         size++;
                     }
-            data[index] = entry.getValue();
+                }
+            }
+        } else {
+            super.putAll(m);
         }
     }
 
@@ -155,13 +172,29 @@ public class TEnumMap<K extends Enum<K>, V> extends AbstractMap<K, V> implements
         }
     }
 
+    @Rename("clone")
+    @SuppressWarnings("unchecked")
+    public TEnumMap<K, V> clone0() {
+        try {
+            TEnumMap<K, V> map = (TEnumMap<K, V>) super.clone();
+            map.keyType = this.keyType;
+            map.provided = this.provided.clone();
+            map.data = this.data.clone();
+            map.size = this.size;
+
+            return map;
+        } catch (TCloneNotSupportedException e) {
+            return null;
+        }
+    }
+
     @Override
-    public Set<Entry<K, V>> entrySet() {
+    public TSet<Entry<K, V>> entrySet() {
         if (entrySet == null) {
-            entrySet = new AbstractSet<Entry<K, V>>() {
+            entrySet = new TAbstractSet<>() {
                 @Override
-                public Iterator<Entry<K, V>> iterator() {
+                public TIterator<Entry<K, V>> iterator() {
-                    return new Iterator<Entry<K, V>>() {
+                    return new TIterator<>() {
                         int index;
                         int removeIndex = -1;
 
@@ -177,7 +210,7 @@ public class TEnumMap<K extends Enum<K>, V> extends AbstractMap<K, V> implements
                         @Override
                         public Entry<K, V> next() {
                             if (index >= data.length) {
-                                throw new NoSuchElementException();
+                                throw new TNoSuchElementException();
                             }
                             removeIndex = index;
                             EntryImpl result = new EntryImpl(index++);
@@ -196,9 +229,11 @@ public class TEnumMap<K extends Enum<K>, V> extends AbstractMap<K, V> implements
                             if (removeIndex < 0) {
                                 throw new IllegalStateException();
                             }
+                            if (provided[removeIndex]) {
                                 data[removeIndex] = null;
                                 provided[removeIndex] = false;
                                 size--;
+                            }
                             removeIndex = -1;
                         }
                     };
@@ -210,12 +245,32 @@ public class TEnumMap<K extends Enum<K>, V> extends AbstractMap<K, V> implements
                 }
 
                 @Override
-                public boolean remove(Object o) {
+                public boolean contains(Object o) {
-                    if (!keyType.isInstance(o)) {
+                    if (!(o instanceof TMap.Entry<?, ?>)) {
                         return false;
                     }
-                    int index = ((Enum<?>) o).ordinal();
+                    TMap.Entry<?, ?> e = (TMap.Entry<?, ?>) o;
-                    if (provided[index]) {
+                    Class<?> cls = e.getKey().getClass();
+                    if (cls != keyType && cls.getSuperclass() != keyType) {
+                        return false;
+                    }
+                    int index = ((Enum<?>) e.getKey()).ordinal();
+                    return provided[index] && TObjects.equals(data[index], e.getValue());
+                }
+
+                @Override
+                public boolean remove(Object o) {
+                    if (!(o instanceof TMap.Entry<?, ?>)) {
+                        return false;
+                    }
+                    TMap.Entry<?, ?> e = (TMap.Entry<?, ?>) o;
+
+                    Class<?> cls = e.getKey().getClass();
+                    if (cls != keyType && cls.getSuperclass() != keyType) {
+                        return false;
+                    }
+                    int index = ((Enum<?>) e.getKey()).ordinal();
+                    if (provided[index] && TObjects.equals(e.getValue(), data[index])) {
                         provided[index] = false;
                         data[index] = null;
                         size--;
@@ -237,28 +292,119 @@ public class TEnumMap<K extends Enum<K>, V> extends AbstractMap<K, V> implements
                         this.index = index;
                     }
 
-                    @Override
                     @SuppressWarnings("unchecked")
-                    public K getKey() {
+                    private K key() {
                         return (K) TGenericEnumSet.getConstants(keyType)[index];
                     }
 
-                    @Override
                     @SuppressWarnings("unchecked")
-                    public V getValue() {
+                    private V value() {
                         return (V) data[index];
                     }
 
+                    @Override
+                    public K getKey() {
+                        if (!provided[index]) {
+                            throw new IllegalStateException();
+                        }
+                        return key();
+                    }
+
+                    @Override
+                    public V getValue() {
+                        if (!provided[index]) {
+                            throw new IllegalStateException();
+                        }
+                        return value();
+                    }
+
                     @Override
                     public V setValue(V value) {
+                        if (!provided[index]) {
+                            throw new IllegalStateException();
+                        }
                         @SuppressWarnings("unchecked")
                         V old = (V) data[index];
                         data[index] = value;
                         return old;
                     }
+
+                    @Override
+                    public boolean equals(Object obj) {
+                        if (this == obj) {
+                            return true;
+                        }
+                        if (obj instanceof TMap.Entry) {
+                            TMap.Entry<?, ?> entry = (TMap.Entry<?, ?>) obj;
+                            return TObjects.equals(key(), entry.getKey()) && TObjects.equals(value(), entry.getValue());
+                        }
+                        return false;
+                    }
+
+                    @Override
+                    public int hashCode() {
+                        return TObjects.hashCode(key()) ^ TObjects.hashCode(value());
+                    }
+
+                    @Override
+                    public String toString() {
+                        return key() + "=" + value();
+                    }
                 }
             };
         }
         return entrySet;
     }
+
+    @Override
+    public TCollection<V> values() {
+        if (cachedValues == null) {
+            cachedValues = new TAbstractCollection<>() {
+                @Override
+                public int size() {
+                    return size;
+                }
+
+                @Override
+                public boolean contains(Object o) {
+                    return containsValue(o);
+                }
+
+                @Override
+                public boolean remove(Object o) {
+                    for (int i = 0; i < data.length; i++) {
+                        if (provided[i] && TObjects.equals(o, data[i])) {
+                            data[i] = null;
+                            provided[i] = false;
+                            size--;
+                            return true;
+                        }
+                    }
+                    return false;
+                }
+
+                @Override
+                public void clear() {
+                    TEnumMap.this.clear();
+                }
+
+                @Override
+                public TIterator<V> iterator() {
+                    final TIterator<TMap.Entry<K, V>> it = entrySet().iterator();
+                    return new TIterator<>() {
+                        @Override public boolean hasNext() {
+                            return it.hasNext();
+                        }
+                        @Override public V next() {
+                            return it.next().getValue();
+                        }
+                        @Override public void remove() {
+                            it.remove();
+                        }
+                    };
+                }
+            };
+        }
+        return cachedValues;
+    }
 }

classlib/src/main/java/org/teavm/classlib/java/util/TEnumSet.java

@@ -28,10 +28,16 @@ public abstract class TEnumSet<E extends Enum<E>> extends AbstractSet<E> impleme
     }
 
     public static <E extends Enum<E>> TEnumSet<E> allOf(Class<E> elementType) {
-        int count = TGenericEnumSet.getConstants(elementType).length;
+        Enum<?>[] constants = TGenericEnumSet.getConstants(elementType);
-        int[] bits = new int[((count - 1) / 32) + 1];
+        if (constants == null) {
+            throw new ClassCastException();
+        }
+        int count = constants.length;
+        int[] bits = new int[count == 0 ? 0 : ((count - 1) / Integer.SIZE) + 1];
         Arrays.fill(bits, ~0);
+        if (count > 0) {
             zeroHighBits(bits, count);
+        }
         return new TGenericEnumSet<>(elementType, bits);
     }
 
@@ -62,7 +68,7 @@ public abstract class TEnumSet<E extends Enum<E>> extends AbstractSet<E> impleme
         TGenericEnumSet<E> other = (TGenericEnumSet<E>) s;
         int count = TGenericEnumSet.getConstants(other.cls).length;
         int[] bits = new int[other.bits.length];
-        for (int i = 0; i < bits.length - 1; ++i) {
+        for (int i = 0; i < bits.length; ++i) {
             bits[i] = ~other.bits[i];
         }
         zeroHighBits(bits, count);
@@ -148,6 +154,6 @@ public abstract class TEnumSet<E extends Enum<E>> extends AbstractSet<E> impleme
     abstract void fastAdd(int n);
 
     private static void zeroHighBits(int[] bits, int count) {
-        bits[bits.length - 1] &= (~0) >>> (32 - count % 32);
+        bits[bits.length - 1] &= ~0 >>> (Integer.SIZE - count % Integer.SIZE);
     }
 }

classlib/src/main/java/org/teavm/classlib/java/util/TGenericEnumSet.java

@@ -18,7 +18,6 @@ package org.teavm.classlib.java.util;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Iterator;
-import java.util.NoSuchElementException;
 import org.teavm.classlib.java.lang.TClass;
 import org.teavm.platform.Platform;
 import org.teavm.platform.PlatformClass;
@@ -29,8 +28,12 @@ class TGenericEnumSet<E extends Enum<E>> extends TEnumSet<E> {
 
     TGenericEnumSet(Class<E> cls) {
         this.cls = cls;
-        int constantCount = getConstants(cls).length;
+        Enum<?>[] constants = getConstants(cls);
-        int bitCount = ((constantCount - 1) / 32) + 1;
+        if (constants == null) {
+            throw new ClassCastException();
+        }
+        int constantCount = constants.length;
+        int bitCount = constantCount == 0 ? 0 : ((constantCount - 1) / Integer.SIZE) + 1;
         this.bits = new int[bitCount];
     }
 
@@ -47,34 +50,39 @@ class TGenericEnumSet<E extends Enum<E>> extends TEnumSet<E> {
 
     @Override
     public Iterator<E> iterator() {
-        return new Iterator<E>() {
+        return new Iterator<>() {
-            int index;
+            private int index = find();
-            int indexToRemove = -1;
+            private int indexToRemove = -1;
-            int count = size();
+
+            private int find() {
+                int overflow = bits.length * Integer.SIZE;
+                while (index < overflow) {
+                    int next = Integer.numberOfTrailingZeros(bits[index / Integer.SIZE] >>> (index % Integer.SIZE));
+                    if (next < Integer.SIZE) {
+                        index += next;
+                        return index;
+                    } else {
+                        index = (index / Integer.SIZE + 1) * Integer.SIZE;
+                    }
+                }
+                return index;
+            }
 
             @Override
             public boolean hasNext() {
-                return count > 0;
+                return index < bits.length * Integer.SIZE;
             }
 
             @Override
             public E next() {
-                if (count == 0) {
+                if (!hasNext()) {
-                    throw new NoSuchElementException();
+                    throw new TNoSuchElementException();
                 }
                 indexToRemove = index;
-                while (true) {
-                    int next = Integer.numberOfTrailingZeros(bits[index / 32] >>> (index % 32));
-                    if (next < 32) {
-                        index += next;
-                        --count;
                 @SuppressWarnings("unchecked")
                 E returnValue = (E) getConstants(cls)[index++];
+                index = find();
                 return returnValue;
-                    } else {
-                        index = (index / 32 + 1) * 32;
-                    }
-                }
             }
 
             @Override
@@ -82,8 +90,8 @@ class TGenericEnumSet<E extends Enum<E>> extends TEnumSet<E> {
                 if (indexToRemove < 0) {
                     throw new IllegalStateException();
                 }
-                int bitNumber = indexToRemove / 32;
+                int bitNumber = indexToRemove / Integer.SIZE;
-                bits[bitNumber] &= ~(1 << (indexToRemove % 32));
+                bits[bitNumber] &= ~(1 << (indexToRemove % Integer.SIZE));
                 indexToRemove = -1;
             }
         };
@@ -104,15 +112,13 @@ class TGenericEnumSet<E extends Enum<E>> extends TEnumSet<E> {
             return true;
         }
         if (!(o instanceof TGenericEnumSet)) {
-            return false;
+            return super.equals(o);
         }
         TGenericEnumSet<?> other = (TGenericEnumSet<?>) o;
-        return cls == other.cls && Arrays.equals(bits, other.bits);
+        if (this.cls != other.cls) {
+            return this.size() == 0 && other.size() == 0;
         }
-
+        return Arrays.equals(bits, other.bits);
-    @Override
-    public int hashCode() {
-        return Arrays.hashCode(bits);
     }
 
     @Override
@@ -140,19 +146,23 @@ class TGenericEnumSet<E extends Enum<E>> extends TEnumSet<E> {
             return false;
         }
         int n = ((Enum<?>) o).ordinal();
-        int bitNumber = n / 32;
+        int bitNumber = n / Integer.SIZE;
-        int bit = 1 << (n % 32);
+        int bit = 1 << (n % Integer.SIZE);
         return (bits[bitNumber] & bit) != 0;
     }
 
     @Override
     void fastAdd(int n) {
-        int bitNumber = n / 32;
+        int bitNumber = n / Integer.SIZE;
-        bits[bitNumber] |= 1 << (n % 32);
+        bits[bitNumber] |= 1 << (n % Integer.SIZE);
     }
 
     @Override
     public boolean add(E t) {
+        Class<?> tCls = t.getClass();
+        if (tCls != cls && tCls.getSuperclass() != cls) {
+            throw new ClassCastException();
+        }
         int n = t.ordinal();
         int bitNumber = n / 32;
         int bit = 1 << (n % 32);
@@ -171,8 +181,8 @@ class TGenericEnumSet<E extends Enum<E>> extends TEnumSet<E> {
         }
 
         int n = ((Enum<?>) o).ordinal();
-        int bitNumber = n / 32;
+        int bitNumber = n / Integer.SIZE;
-        int bit = 1 << (n % 32);
+        int bit = 1 << (n % Integer.SIZE);
         if ((bits[bitNumber] & bit) != 0) {
             bits[bitNumber] &= ~bit;
             return true;

tests/src/test/java/org/teavm/classlib/java/util/EnumMapTest.java

@@ -17,16 +17,23 @@ package org.teavm.classlib.java.util;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertNotSame;
 import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertSame;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collection;
 import java.util.EnumMap;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
+import java.util.NoSuchElementException;
+import java.util.Objects;
+import java.util.Set;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.teavm.junit.TeaVMTestRunner;
@@ -228,7 +235,486 @@ public class EnumMapTest {
         assertEquals(1, map.size());
     }
 
+    @Test
+    @SuppressWarnings("unchecked")
+    public void constructorMap() {
+        EnumMap enumMap;
+        Map enumColorMap = null;
+        try {
+            enumMap = new EnumMap(enumColorMap);
+            fail("Expected NullPointerException");
+        } catch (NullPointerException e) {
+            // Expected
+        }
+        enumColorMap = new EnumMap<Color, Double>(Color.class);
+        enumMap      = new EnumMap(enumColorMap);
+        enumColorMap.put(Color.Blue, 3);
+        enumMap      = new EnumMap(enumColorMap);
+
+        HashMap hashColorMap = null;
+        try {
+            enumMap = new EnumMap(hashColorMap);
+            fail("Expected NullPointerException");
+        } catch (NullPointerException e) {
+            // Expected
+        }
+
+        hashColorMap = new HashMap();
+        try {
+            enumMap = new EnumMap(hashColorMap);
+            fail("Expected IllegalArgumentException");
+        } catch (IllegalArgumentException e) {
+            // Expected
+        }
+
+        hashColorMap.put(Color.Green, 2);
+        enumMap = new EnumMap(hashColorMap);
+        assertEquals("Constructor fails", 2, enumMap.get(Color.Green));
+        assertNull("Constructor fails", enumMap.get(Color.Red));
+        enumMap.put(Color.Red, 1);
+        assertEquals("Wrong value", 1, enumMap.get(Color.Red));
+        hashColorMap.put(Size.Big, 3);
+        try {
+            enumMap = new EnumMap(hashColorMap);
+            fail("Expected ClassCastException");
+        } catch (ClassCastException e) {
+            // Expected
+        }
+
+        hashColorMap = new HashMap();
+        hashColorMap.put(1, 1);
+        try {
+            enumMap = new EnumMap(hashColorMap);
+            fail("Expected ClassCastException");
+        } catch (ClassCastException e) {
+            // Expected
+        }
+    }
+
+    @Test
+    @SuppressWarnings({ "unchecked", "rawtypes" })
+    public void putAll() {
+        EnumMap enumColorMap = new EnumMap(Color.class);
+        enumColorMap.put(Color.Green, 2);
+        EnumMap enumSizeMap = new EnumMap(Size.class);
+        enumColorMap.putAll(enumSizeMap);
+        enumSizeMap.put(Size.Big, 1);
+        try {
+            enumColorMap.putAll(enumSizeMap);
+            fail("Expected ClassCastException");
+        } catch (ClassCastException e) {
+            // Expected
+        }
+        EnumMap enumColorMap1 = new EnumMap<Color, Double>(Color.class);
+        enumColorMap1.put(Color.Blue, 3);
+        enumColorMap.putAll(enumColorMap1);
+        assertEquals("Get returned incorrect value for given key", 3, enumColorMap.get(Color.Blue));
+        assertEquals("Wrong Size", 2, enumColorMap.size());
+        enumColorMap = new EnumMap<Color, Double>(Color.class);
+        HashMap hashColorMap = null;
+        try {
+            enumColorMap.putAll(hashColorMap);
+            fail("Expected NullPointerException");
+        } catch (NullPointerException e) {
+            // Expected
+        }
+        hashColorMap = new HashMap();
+        enumColorMap.putAll(hashColorMap);
+        hashColorMap.put(Color.Green, 2);
+        enumColorMap.putAll(hashColorMap);
+        assertEquals("Get returned incorrect value for given key", 2, enumColorMap.get(Color.Green));
+        assertNull("Get returned non-null for non mapped key", enumColorMap.get(Color.Red));
+        hashColorMap.put(Color.Red, 1);
+        enumColorMap.putAll(hashColorMap);
+        assertEquals("Get returned incorrect value for given key", 2, enumColorMap.get(Color.Green));
+        hashColorMap.put(Size.Big, 3);
+        try {
+            enumColorMap.putAll(hashColorMap);
+            fail("Expected ClassCastException");
+        } catch (ClassCastException e) {
+            // Expected
+        }
+        hashColorMap = new HashMap();
+        hashColorMap.put(1, 1);
+        try {
+            enumColorMap.putAll(hashColorMap);
+            fail("Expected ClassCastException");
+        } catch (ClassCastException e) {
+            // Expected
+        }
+    }
+
+    @Test
+    public void cloneWorks() {
+        EnumMap<Size, Integer> enumSizeMap = new EnumMap<>(Size.class);
+        Integer integer = Integer.valueOf("3");
+        enumSizeMap.put(Size.Small, integer);
+        EnumMap<Size, Integer> enumSizeMapClone = enumSizeMap.clone();
+        assertNotSame("Should not be same", enumSizeMap, enumSizeMapClone);
+        assertEquals("Clone answered unequal EnumMap", enumSizeMap, enumSizeMapClone);
+        assertSame("Should be same", enumSizeMap.get(Size.Small), enumSizeMapClone.get(Size.Small));
+        assertSame("Clone is not shallow clone", integer, enumSizeMapClone.get(Size.Small));
+        enumSizeMap.remove(Size.Small);
+        assertSame("Clone is not shallow clone", integer, enumSizeMapClone.get(Size.Small));
+    }
+
+    @Test
+    @SuppressWarnings({ "unchecked", "rawtypes" })
+    public void entrySet() {
+        EnumMap<Size, Integer> enumSizeMap = new EnumMap<>(Size.class);
+        enumSizeMap.put(Size.Middle, 1);
+        enumSizeMap.put(Size.Big, null);
+        MockEntry<Size, Integer> mockEntry = new MockEntry<>(Size.Middle, 1);
+        Set<Map.Entry<Size, Integer>> set = enumSizeMap.entrySet();
+        Set<Map.Entry<Size, Integer>> set1 = enumSizeMap.entrySet();
+        assertSame("Should be same", set1, set);
+        try {
+            set.add(mockEntry);
+            fail("Should throw UnsupportedOperationException");
+        } catch (UnsupportedOperationException e) {
+            // Expected
+        }
+        assertTrue("Returned false for contained object", set.contains(mockEntry));
+        mockEntry = new MockEntry<>(Size.Middle, null);
+        assertFalse("Returned true for uncontained object", set.contains(mockEntry));
+        assertFalse("Returned true for uncontained object", set.contains(Size.Small));
+        assertFalse("Returned true for uncontained object", set.contains(new MockEntry(1, 1)));
+        assertFalse("Returned true for uncontained object", set.contains(1));
+        mockEntry = new MockEntry<>(Size.Big, null);
+        assertTrue("Returned false for contained object", set.contains(mockEntry));
+        assertTrue("Returned false when the object can be removed", set.remove(mockEntry));
+        assertFalse("Returned true for uncontained object", set.contains(mockEntry));
+        assertFalse("Returned true when the object can not be removed", set.remove(mockEntry));
+        assertFalse("Returned true when the object can not be removed", set.remove(new MockEntry(1, 1)));
+        assertFalse("Returned true when the object can not be removed", set.remove(1));
+        // The set is backed by the map so changes to one are reflected by the
+        // other.
+        enumSizeMap.put(Size.Big, 3);
+        mockEntry = new MockEntry<>(Size.Big, 3);
+        assertTrue("Returned false for contained object", set.contains(mockEntry));
+        enumSizeMap.remove(Size.Big);
+        assertFalse("Returned true for uncontained object", set.contains(mockEntry));
+        assertEquals("Wrong size", 1, set.size());
+        set.clear();
+        assertEquals("Wrong size", 0, set.size());
+        enumSizeMap = new EnumMap<>(Size.class);
+        enumSizeMap.put(Size.Middle, 1);
+        enumSizeMap.put(Size.Big, null);
+        set = enumSizeMap.entrySet();
+        Collection<Map.Entry<Size, Integer>> c = new ArrayList<>();
+        c.add(new MockEntry<>(Size.Middle, 1));
+        assertTrue("Return wrong value", set.containsAll(c));
+        assertTrue("Remove does not success", set.removeAll(c));
+        enumSizeMap.put(Size.Middle, 1);
+        c.add(new MockEntry(Size.Big, 3));
+        assertTrue("Remove does not success", set.removeAll(c));
+        assertFalse("Should return false", set.removeAll(c));
+        assertEquals("Wrong size", 1, set.size());
+        enumSizeMap = new EnumMap<>(Size.class);
+        enumSizeMap.put(Size.Middle, 1);
+        enumSizeMap.put(Size.Big, null);
+        set = enumSizeMap.entrySet();
+        c = new ArrayList<>();
+        c.add(new MockEntry(Size.Middle, 1));
+        c.add(new MockEntry(Size.Big, 3));
+        assertTrue("Retain does not success", set.retainAll(c));
+        assertEquals("Wrong size", 1, set.size());
+        assertFalse("Should return false", set.retainAll(c));
+        enumSizeMap = new EnumMap<>(Size.class);
+        enumSizeMap.put(Size.Middle, 1);
+        enumSizeMap.put(Size.Big, null);
+        set = enumSizeMap.entrySet();
+        Object[] array = set.toArray();
+        assertEquals("Wrong length", 2, array.length);
+        Map.Entry entry = (Map.Entry) array[0];
+        assertEquals("Wrong key", Size.Middle, entry.getKey());
+        assertEquals("Wrong value", 1, entry.getValue());
+        Object[] array1 = new Object[10];
+        array1 = set.toArray();
+        assertEquals("Wrong length", 2, array1.length);
+        entry = (Map.Entry) array[0];
+        assertEquals("Wrong key", Size.Middle, entry.getKey());
+        assertEquals("Wrong value", 1, entry.getValue());
+        array1 = new Object[10];
+        array1 = set.toArray(array1);
+        assertEquals("Wrong length", 10, array1.length);
+        entry = (Map.Entry) array[1];
+        assertEquals("Wrong key", Size.Big, entry.getKey());
+        assertNull("Should be null", array1[2]);
+        set = enumSizeMap.entrySet();
+        Integer integer = Integer.valueOf("1");
+        assertFalse("Returned true when the object can not be removed", set.remove(integer));
+        assertTrue("Returned false when the object can be removed", set.remove(entry));
+        enumSizeMap = new EnumMap<>(EnumMapTest.Size.class);
+        enumSizeMap.put(Size.Middle, 1);
+        enumSizeMap.put(Size.Big, null);
+        set = enumSizeMap.entrySet();
+        Iterator<Map.Entry<Size, Integer>> iter = set.iterator();
+        entry = iter.next();
+        assertTrue("Returned false for contained object", set.contains(entry));
+        mockEntry = new MockEntry<>(Size.Middle, 2);
+        assertFalse("Returned true for uncontained object", set.contains(mockEntry));
+        assertFalse("Returned true for uncontained object", set
+                .contains(new MockEntry(2, 2)));
+        entry = iter.next();
+        assertTrue("Returned false for contained object", set.contains(entry));
+        enumSizeMap.put(Size.Middle, 1);
+        enumSizeMap.remove(Size.Big);
+        mockEntry = new MockEntry<>(Size.Big, null);
+        assertEquals("Wrong size", 1, set.size());
+        assertFalse("Returned true for uncontained object", set.contains(mockEntry));
+        enumSizeMap.put(Size.Big, 2);
+        mockEntry = new MockEntry<>(Size.Big, 2);
+        assertTrue("Returned false for contained object", set
+                .contains(mockEntry));
+        iter.remove();
+        try {
+            iter.remove();
+            fail("Should throw IllegalStateException");
+        } catch (IllegalStateException e) {
+            // Expected
+        }
+        try {
+            entry.setValue(2);
+            fail("Should throw IllegalStateException");
+        } catch (IllegalStateException e) {
+            // Expected
+        }
+        try {
+            set.contains(entry);
+            fail("Should throw IllegalStateException");
+        } catch (IllegalStateException e) {
+            // Expected
+        }
+        enumSizeMap = new EnumMap(Size.class);
+        enumSizeMap.put(Size.Middle, 1);
+        enumSizeMap.put(Size.Big, null);
+        set = enumSizeMap.entrySet();
+        iter = set.iterator();
+        entry = iter.next();
+        assertEquals("Wrong key", Size.Middle, entry.getKey());
+        assertTrue("Returned false for contained object", set.contains(entry));
+        enumSizeMap.put(Size.Middle, 3);
+        assertTrue("Returned false for contained object", set.contains(entry));
+        entry.setValue(2);
+        assertTrue("Returned false for contained object", set.contains(entry));
+        assertFalse("Returned true for uncontained object", set.remove(1));
+        iter.next();
+        assertEquals("Wrong key", Size.Middle, entry.getKey());
+        set.clear();
+        assertEquals("Wrong size", 0, set.size());
+        enumSizeMap = new EnumMap<>(Size.class);
+        enumSizeMap.put(Size.Middle, 1);
+        enumSizeMap.put(Size.Big, null);
+        set = enumSizeMap.entrySet();
+        iter = set.iterator();
+        mockEntry = new MockEntry<>(Size.Middle, 1);
+        assertNotEquals("Wrong result", entry, mockEntry);
+        try {
+            iter.remove();
+            fail("Should throw IllegalStateException");
+        } catch (IllegalStateException e) {
+            // Expected
+        }
+        entry = iter.next();
+        assertEquals("Wrong key", Size.Middle, entry.getKey());
+        assertEquals("Should return true", entry, mockEntry);
+        assertEquals("Should be equal", mockEntry.hashCode(), entry.hashCode());
+        mockEntry = new MockEntry<>(Size.Big, 1);
+        assertNotEquals("Wrong result", entry, mockEntry);
+        entry = iter.next();
+        assertNotEquals("Wrong result", entry, mockEntry);
+        assertEquals("Wrong key", Size.Big, entry.getKey());
+        iter.remove();
+        assertNotEquals("Wrong result", entry, mockEntry);
+        assertEquals("Wrong size", 1, set.size());
+        try {
+            iter.remove();
+            fail("Should throw IllegalStateException");
+        } catch (IllegalStateException e) {
+            // Expected
+        }
+        try {
+            iter.next();
+            fail("Should throw NoSuchElementException");
+        } catch (NoSuchElementException e) {
+            // Expected
+        }
+    }
+
+    @Test
+    @SuppressWarnings({ "unchecked", "boxing" })
+    public void values() {
+        EnumMap<Color, Integer> enumColorMap = new EnumMap<>(Color.class);
+        enumColorMap.put(Color.Red, 1);
+        enumColorMap.put(Color.Blue, null);
+        Collection<Integer> collection = enumColorMap.values();
+        Collection<Integer> collection1 = enumColorMap.values();
+        assertSame("Should be same", collection1, collection);
+        try {
+            collection.add(1);
+            fail("Should throw UnsupportedOperationException");
+        } catch (UnsupportedOperationException e) {
+            // Expected
+        }
+        assertTrue("Returned false for contained object", collection.contains(1));
+        assertTrue("Returned false for contained object", collection.contains(null));
+        assertFalse("Returned true for uncontained object", collection.contains(2));
+        assertTrue("Returned false when the object can be removed", collection.remove(null));
+        assertFalse("Returned true for uncontained object", collection.contains(null));
+        assertFalse("Returned true when the object can not be removed", collection.remove(null));
+        // The set is backed by the map so changes to one are reflected by the other.
+        enumColorMap.put(Color.Blue, 3);
+        assertTrue("Returned false for contained object", collection.contains(3));
+        enumColorMap.remove(Color.Blue);
+        assertFalse("Returned true for uncontained object", collection.contains(3));
+        assertEquals("Wrong size", 1, collection.size());
+        collection.clear();
+        assertEquals("Wrong size", 0, collection.size());
+        enumColorMap = new EnumMap<>(Color.class);
+        enumColorMap.put(Color.Red, 1);
+        enumColorMap.put(Color.Blue, null);
+        collection = enumColorMap.values();
+        Collection c = new ArrayList<>();
+        c.add(1);
+        assertTrue("Should return true", collection.containsAll(c));
+        c.add(3.4);
+        assertFalse("Should return false", collection.containsAll(c));
+        assertTrue("Should return true", collection.removeAll(c));
+        assertEquals("Wrong size", 1, collection.size());
+        assertFalse("Should return false", collection.removeAll(c));
+        assertEquals("Wrong size", 1, collection.size());
+        try {
+            collection.addAll(c);
+            fail("Should throw UnsupportedOperationException");
+        } catch (UnsupportedOperationException e) {
+            // Expected
+        }
+        enumColorMap.put(Color.Red, 1);
+        assertEquals("Wrong size", 2, collection.size());
+        assertTrue("Should return true", collection.retainAll(c));
+        assertEquals("Wrong size", 1, collection.size());
+        assertFalse("Should return false", collection.retainAll(c));
+        assertEquals(1, collection.size());
+        Object[] array = collection.toArray();
+        assertEquals("Wrong length", 1, array.length);
+        assertEquals("Wrong key", 1, array[0]);
+        enumColorMap = new EnumMap<>(Color.class);
+        enumColorMap.put(Color.Red, 1);
+        enumColorMap.put(Color.Blue, null);
+        collection = enumColorMap.values();
+        assertEquals("Wrong size", 2, collection.size());
+        assertFalse("Returned true when the object can not be removed",
+                collection.remove(Integer.valueOf("10")));
+        Iterator<Integer> iter = enumColorMap.values().iterator();
+        Object value = iter.next();
+        assertTrue("Returned false for contained object", collection.contains(value));
+        value = iter.next();
+        assertTrue("Returned false for contained object", collection.contains(value));
+        enumColorMap.put(Color.Green, 1);
+        enumColorMap.remove(Color.Blue);
+        assertFalse("Returned true for uncontained object", collection.contains(value));
+        iter.remove();
+        assertEquals("{Red=1, Green=1}", enumColorMap.toString());
+        try {
+            iter.remove();
+            fail("Should throw IllegalStateException");
+        } catch (IllegalStateException e) {
+            // Expected
+        }
+        assertFalse("Returned true for uncontained object", collection.contains(value));
+        iter = enumColorMap.values().iterator();
+        value = iter.next();
+        assertTrue("Returned false for contained object", collection.contains(value));
+        enumColorMap.put(Color.Green, 3);
+        assertTrue("Returned false for contained object", collection.contains(value));
+        assertTrue("Returned false for contained object", collection.remove(Integer.valueOf("1")));
+        assertEquals("Wrong size", 1, collection.size());
+        collection.clear();
+        assertEquals("Wrong size", 0, collection.size());
+        enumColorMap = new EnumMap<>(Color.class);
+        Integer integer1 = 1;
+        enumColorMap.put(Color.Green, integer1);
+        enumColorMap.put(Color.Blue, null);
+        collection = enumColorMap.values();
+        iter = enumColorMap.values().iterator();
+        try {
+            iter.remove();
+            fail("Should throw IllegalStateException");
+        } catch (IllegalStateException e) {
+            // Expected
+        }
+        value = iter.next();
+        assertEquals("Wrong value", integer1, value);
+        assertSame("Wrong value", integer1, value);
+        assertNotEquals("Returned true for unequal object", iter, value);
+        iter.remove();
+        assertNotEquals("Returned true for unequal object", iter, value);
+        try {
+            iter.remove();
+            fail("Should throw IllegalStateException");
+        } catch (IllegalStateException e) {
+            // Expected
+        }
+        assertEquals("Wrong size", 1, collection.size());
+        value = iter.next();
+        assertNotEquals("Returned true for unequal object", iter, value);
+        iter.remove();
+        try {
+            iter.next();
+            fail("Should throw NoSuchElementException");
+        } catch (NoSuchElementException e) {
+            // Expected
+        }
+    }
+
+    enum Size {
+        Small, Middle, Big {
+        }
+    }
+    enum Color {
+        Red, Green, Blue {
+        }
+    }
+    enum Empty {
+        //Empty
+    }
+
     enum L {
         A, B, C
     }
+
+    private static class MockEntry<K, V> implements Map.Entry<K, V> {
+        private K key;
+        private V value;
+        public MockEntry(K key, V value) {
+            this.key   = key;
+            this.value = value;
+        }
+        @Override
+        public int hashCode() {
+            return (key == null ? 0 : key.hashCode())
+                    ^ (value == null ? 0 : value.hashCode());
+        }
+        @Override
+        public boolean equals(Object o) {
+            return o instanceof Map.Entry<?, ?> e
+                    && Objects.equals(key, e.getKey())
+                    && Objects.equals(value, e.getValue());
+        }
+        @Override
+        public K getKey() {
+            return key;
+        }
+        @Override
+        public V getValue() {
+            return value;
+        }
+        @Override
+        public V setValue(V object) {
+            V oldValue = value;
+            value = object;
+            return oldValue;
+        }
+    }
 }

tests/src/test/java/org/teavm/classlib/java/util/EnumSetTest.java

@@ -19,7 +19,9 @@ import static org.junit.Assert.*;
 import java.util.*;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.teavm.junit.SkipPlatform;
 import org.teavm.junit.TeaVMTestRunner;
+import org.teavm.junit.TestPlatform;
 
 @RunWith(TeaVMTestRunner.class)
 public class EnumSetTest {
@@ -196,6 +198,215 @@ public class EnumSetTest {
         assertEquals(original, set);
     }
 
+    @Test
+    @SkipPlatform({ TestPlatform.WEBASSEMBLY, TestPlatform.WASI })
+    public void iterator() {
+        Set<EnumFoo> set = EnumSet.noneOf(EnumFoo.class);
+        set.add(EnumFoo.a);
+        set.add(EnumFoo.b);
+        Iterator<EnumFoo> iterator = set.iterator();
+        Iterator<EnumFoo> anotherIterator = set.iterator();
+        assertNotSame("Should not be same", iterator, anotherIterator);
+        try {
+            iterator.remove();
+            fail("Should throw IllegalStateException");
+        } catch (IllegalStateException e) {
+            // expectedd
+        }
+        assertTrue("Should has next element:", iterator.hasNext());
+        assertSame("Should be identical", EnumFoo.a, iterator.next());
+        iterator.remove();
+        assertTrue("Should has next element:", iterator.hasNext());
+        assertSame("Should be identical", EnumFoo.b, iterator.next());
+        assertFalse("Should not has next element:", iterator.hasNext());
+        assertFalse("Should not has next element:", iterator.hasNext());
+        assertEquals("Size should be 1:", 1, set.size());
+        try {
+            iterator.next();
+            fail("Should throw NoSuchElementException");
+        } catch (NoSuchElementException e) {
+            // expected
+        }
+        set = EnumSet.noneOf(EnumFoo.class);
+        set.add(EnumFoo.a);
+        iterator = set.iterator();
+        assertEquals("Should be equal", EnumFoo.a, iterator.next());
+        iterator.remove();
+        try {
+            iterator.remove();
+            fail("Should throw IllegalStateException");
+        } catch (IllegalStateException e) {
+            // expected
+        }
+        Set<EmptyEnum> emptySet = EnumSet.allOf(EmptyEnum.class);
+        Iterator<EmptyEnum> emptyIterator = emptySet.iterator();
+        try {
+            emptyIterator.next();
+            fail("Should throw NoSuchElementException");
+        } catch (NoSuchElementException e) {
+            // expected
+        }
+        Set<EnumWithInnerClass> setWithSubclass = EnumSet
+                .allOf(EnumWithInnerClass.class);
+        setWithSubclass.remove(EnumWithInnerClass.e);
+        Iterator<EnumWithInnerClass> iteratorWithSubclass = setWithSubclass
+                .iterator();
+        assertSame("Should be same", EnumWithInnerClass.a, iteratorWithSubclass.next());
+        assertTrue("Should return true", iteratorWithSubclass.hasNext());
+        assertSame("Should be same", EnumWithInnerClass.b, iteratorWithSubclass.next());
+        setWithSubclass.remove(EnumWithInnerClass.c);
+        assertTrue("Should return true", iteratorWithSubclass.hasNext());
+        assertSame("Should be same", EnumWithInnerClass.c, iteratorWithSubclass.next());
+        assertTrue("Should return true", iteratorWithSubclass.hasNext());
+        assertSame("Should be same", EnumWithInnerClass.d, iteratorWithSubclass.next());
+        setWithSubclass.add(EnumWithInnerClass.e);
+        assertTrue("Should return true", iteratorWithSubclass.hasNext());
+        assertSame("Should be same", EnumWithInnerClass.f, iteratorWithSubclass.next());
+        set = EnumSet.noneOf(EnumFoo.class);
+        iterator = set.iterator();
+        try {
+            iterator.next();
+            fail("Should throw NoSuchElementException");
+        } catch (NoSuchElementException e) {
+            // expected
+        }
+        set.add(EnumFoo.a);
+        iterator = set.iterator();
+        assertEquals("Should return EnumFoo.a", EnumFoo.a, iterator.next());
+        assertEquals("Size of set should be 1", 1, set.size());
+        iterator.remove();
+        assertEquals("Size of set should be 0", 0, set.size());
+        assertFalse("Should return false", set.contains(EnumFoo.a));
+        set.add(EnumFoo.a);
+        set.add(EnumFoo.b);
+        iterator = set.iterator();
+        assertEquals("Should be equals", EnumFoo.a, iterator.next());
+        iterator.remove();
+        try {
+            iterator.remove();
+            fail("Should throw IllegalStateException");
+        } catch (IllegalStateException e) {
+            // expected
+        }
+        assertTrue("Should have next element", iterator.hasNext());
+        try {
+            iterator.remove();
+            fail("Should throw IllegalStateException");
+        } catch (IllegalStateException e) {
+            // expected
+        }
+        assertEquals("Size of set should be 1", 1, set.size());
+        assertTrue("Should have next element", iterator.hasNext());
+        assertEquals("Should return EnumFoo.b", EnumFoo.b, iterator.next());
+        set.remove(EnumFoo.b);
+        assertEquals("Size of set should be 0", 0, set.size());
+        iterator.remove();
+        assertFalse("Should return false", set.contains(EnumFoo.a));
+        assertFalse("Should return false", set.contains(EnumFoo.b));
+        // test enum type with more than 64 elements
+        Set<HugeEnum> hugeSet = EnumSet.noneOf(HugeEnum.class);
+        hugeSet.add(HugeEnum.a);
+        hugeSet.add(HugeEnum.b);
+        Iterator<HugeEnum> hIterator = hugeSet.iterator();
+        Iterator<HugeEnum> anotherHugeIterator = hugeSet.iterator();
+        assertNotSame(hIterator, anotherHugeIterator);
+        try {
+            hIterator.remove();
+            fail("Should throw IllegalStateException");
+        } catch (IllegalStateException e) {
+            // expected
+        }
+        assertTrue(hIterator.hasNext());
+        assertSame(HugeEnum.a, hIterator.next());
+        hIterator.remove();
+        assertTrue(hIterator.hasNext());
+        assertSame(HugeEnum.b, hIterator.next());
+        assertFalse(hIterator.hasNext());
+        assertFalse(hIterator.hasNext());
+        assertEquals(1, hugeSet.size());
+        try {
+            hIterator.next();
+            fail("Should throw NoSuchElementException");
+        } catch (NoSuchElementException e) {
+            // expected
+        }
+        Set<HugeEnumWithInnerClass> hugeSetWithSubclass = EnumSet
+                .allOf(HugeEnumWithInnerClass.class);
+        hugeSetWithSubclass.remove(HugeEnumWithInnerClass.e);
+        Iterator<HugeEnumWithInnerClass> hugeIteratorWithSubclass = hugeSetWithSubclass.iterator();
+        assertSame(HugeEnumWithInnerClass.a, hugeIteratorWithSubclass.next());
+        assertTrue(hugeIteratorWithSubclass.hasNext());
+        assertSame(HugeEnumWithInnerClass.b, hugeIteratorWithSubclass.next());
+        setWithSubclass.remove(HugeEnumWithInnerClass.c);
+        assertTrue(hugeIteratorWithSubclass.hasNext());
+        assertSame(HugeEnumWithInnerClass.c, hugeIteratorWithSubclass.next());
+        assertTrue(hugeIteratorWithSubclass.hasNext());
+        assertSame(HugeEnumWithInnerClass.d, hugeIteratorWithSubclass.next());
+        hugeSetWithSubclass.add(HugeEnumWithInnerClass.e);
+        assertTrue(hugeIteratorWithSubclass.hasNext());
+        assertSame(HugeEnumWithInnerClass.f, hugeIteratorWithSubclass.next());
+        hugeSet = EnumSet.noneOf(HugeEnum.class);
+        hIterator = hugeSet.iterator();
+        try {
+            hIterator.next();
+            fail("Should throw NoSuchElementException");
+        } catch (NoSuchElementException e) {
+            // expected
+        }
+        hugeSet.add(HugeEnum.a);
+        hIterator = hugeSet.iterator();
+        assertEquals(HugeEnum.a, hIterator.next());
+        assertEquals(1, hugeSet.size());
+        hIterator.remove();
+        assertEquals(0, hugeSet.size());
+        assertFalse(hugeSet.contains(HugeEnum.a));
+        hugeSet.add(HugeEnum.a);
+        hugeSet.add(HugeEnum.b);
+        hIterator = hugeSet.iterator();
+        hIterator.next();
+        hIterator.remove();
+        assertTrue(hIterator.hasNext());
+        try {
+            hIterator.remove();
+            fail("Should throw IllegalStateException");
+        } catch (IllegalStateException e) {
+            // expected
+        }
+        assertEquals(1, hugeSet.size());
+        assertTrue(hIterator.hasNext());
+        assertEquals(HugeEnum.b, hIterator.next());
+        hugeSet.remove(HugeEnum.b);
+        assertEquals(0, hugeSet.size());
+        hIterator.remove();
+        assertFalse(hugeSet.contains(HugeEnum.a));
+        assertFalse("Should return false", set.contains(EnumFoo.b));
+    }
+
+    enum EnumWithInnerClass {
+        a, b, c, d, e, f {
+        },
+    }
+    enum EnumFoo {
+        a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z,
+        A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z,
+        aa, bb, cc, dd, ee, ff, gg, hh, ii, jj, kk, ll,
+    }
+    enum EmptyEnum {
+        // expected
+    }
+    enum HugeEnumWithInnerClass {
+        a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z,
+        A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z,
+        aa, bb, cc, dd, ee, ff, gg, hh, ii, jj, kk, ll,
+        mm {
+        },
+    }
+    enum HugeEnum {
+        a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z,
+        A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z,
+        aa, bb, cc, dd, ee, ff, gg, hh, ii, jj, kk, ll, mm,
+    }
+    
     enum L {
         E1, E2, E3, E4, E5, E6, E7, E8, E9, E10, E11, E12, E13, E14, E15, E16, E17, E18, E19, E20, E21, E22, E23,
         E24, E25, E26, E27, E28, E29, E30, E31, E32, E33, E34, E35, E36