Examples of java.util.AbstractMap.clear()

java.util.AbstractMap.clear()
{@inheritDoc}
This implementation calls entrySet().clear().
Note that this implementation throws an UnsupportedOperationException if the entrySet does not support the clear operation. @throws UnsupportedOperationException {@inheritDoc}

    assertTrue("values() is identical", values2 != values);
    
    // values() and keySet() on the cloned() map should be different
    assertEquals("values() was not cloned", 
        "value2", values2.iterator().next());
    map2.clear();
    map2.put("key2", "value3");
    Set key2 = map2.keySet();
    assertTrue("keySet() is identical", key2 != keys);
    assertEquals("keySet() was not cloned", 
        "key2", key2.iterator().next());

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     */
    public void test_clear() {
        // normal clear()
        AbstractMap map = new HashMap();
        map.put(1, 1);
        map.clear();
        assertTrue(map.isEmpty());


        // Special entrySet return a Set with no clear method.
        AbstractMap myMap = new MocAbstractMap();
        try {

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        assertTrue(map.isEmpty());


        // Special entrySet return a Set with no clear method.
        AbstractMap myMap = new MocAbstractMap();
        try {
            myMap.clear();
            fail("Should throw UnsupportedOprationException");
        } catch (UnsupportedOperationException e) {
            // expected
        }
    }

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    Collection values2 = map2.values();
    assertTrue("values() is identical", values2 != values);
    // values() and keySet() on the cloned() map should be different
    assertEquals("values() was not cloned", 
        "value2", values2.iterator().next());
    map2.clear();
    map2.put("key2", "value3");
    Set key2 = map2.keySet();
    assertTrue("keySet() is identical", key2 != keys);
    assertEquals("keySet() was not cloned", 
        "key2", key2.iterator().next());

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        Collection values2 = map2.values();
        assertTrue("values() is identical", values2 != values);
        // values() and keySet() on the cloned() map should be different
        assertEquals("values() was not cloned", "value2", values2.iterator()
                .next());
        map2.clear();
        map2.put("key2", "value3");
        Set key2 = map2.keySet();
        assertTrue("keySet() is identical", key2 != keys);
        assertEquals("keySet() was not cloned", "key2", key2.iterator().next());
    }

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    Collection values2 = map2.values();
    assertTrue("values() is identical", values2 != values);
    // values() and keySet() on the cloned() map should be different
    assertEquals("values() was not cloned", 
        "value2", values2.iterator().next());
    map2.clear();
    map2.put("key2", "value3");
    Set key2 = map2.keySet();
    assertTrue("keySet() is identical", key2 != keys);
    assertEquals("keySet() was not cloned", 
        "key2", key2.iterator().next());

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     */
    public void test_clear() {
        // normal clear()
        AbstractMap map = new HashMap();
        map.put(1, 1);
        map.clear();
        assertTrue(map.isEmpty());


        // Special entrySet return a Set with no clear method.
        AbstractMap myMap = new MocAbstractMap();
        try {

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        assertTrue(map.isEmpty());


        // Special entrySet return a Set with no clear method.
        AbstractMap myMap = new MocAbstractMap();
        try {
            myMap.clear();
            fail("Should throw UnsupportedOprationException");
        } catch (UnsupportedOperationException e) {
            // expected
        }
    }

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    assertTrue("values() is identical", values2 != values);
    
    // values() and keySet() on the cloned() map should be different
    assertEquals("values() was not cloned", 
        "value2", values2.iterator().next());
    map2.clear();
    map2.put("key2", "value3");
    Set key2 = map2.keySet();
    assertTrue("keySet() is identical", key2 != keys);
    assertEquals("keySet() was not cloned", 
        "key2", key2.iterator().next());

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        Collection values2 = map2.values();
        assertTrue("values() is identical", values2 != values);
        // values() and keySet() on the cloned() map should be different
        assertEquals("values() was not cloned", "value2", values2.iterator()
                .next());
        map2.clear();
        map2.put("key2", "value3");
        Set key2 = map2.keySet();
        assertTrue("keySet() is identical", key2 != keys);
        assertEquals("keySet() was not cloned", "key2", key2.iterator().next());
    }

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