### Question:
AttributesImpl implements Attributes { public void clear() { if (data != null) { for (int i = 0; i < (length * 5); i++) { data[i] = null; } } qNameIndex.clear(); length = 0; } AttributesImpl();  AttributesImpl(final Attributes atts); @Override int getLength(); @Override String getURI(final int index); @Override String getLocalName(final int index); @Override String getQName(final int index); @Override String getType(final int index); @Override String getValue(final int index); @Override int getIndex(final String uri, final String localName); @Override int getIndex(final String qName); @Override String getType(final String uri, final String localName); @Override String getType(final String qName); @Override String getValue(final String uri, final String localName); @Override String getValue(final String qName); void clear(); void setAttributes(final Attributes atts); void addAttribute(final String uri, final String localName, final String qName, final String type, final String value); void setAttribute(final int index, final String uri, final String localName, final String qName, final String type, final String value); void removeAttribute(final int index); void setURI(final int index, final String uri); void setLocalName(final int index, final String localName); void setQName(final int index, final String qName); void setType(final int index, final String type); void setValue(final int index, final String value);  }### Answer:
@Test public void testClear() { AttributesImpl attributes = new AttributesImpl(); String uri = "xmlns=\"http: String localName = "localname"; String qname = "qname"; String type = "type"; String value = "value"; for (int i = 0; i < 10; i++) { attributes.addAttribute(uri, localName, qname + String.valueOf(i), type, value); } Assert.assertNotNull(attributes.getType(qname + "0"), "qname should not be empty before clear"); Assert.assertEquals(attributes.getLength(), 10, "Length mismatched before clear operation"); attributes.clear(); Assert.assertEquals(attributes.getLength(), 0, "Length mismatched after clear operation"); Assert.assertNull(attributes.getType(qname), "qname should be empty after clear"); }