### Question:
UppercaseStandardizer implements StandardizationPolicy { @Override public String convertValue(String value) { return value.toUpperCase(); } private  UppercaseStandardizer(); static UppercaseStandardizer instance(); @Override String convertValue(String value); Boolean accepts(Object value); Object convertRawValue(Object value);  }### Answer:
@Test public void testConvertValue() throws Exception { UppercaseStandardizer standardizer = UppercaseStandardizer.instance(); assertEquals("ABC", standardizer.convertValue("abc")); assertEquals("HOW ARE YOU?", standardizer.convertValue("how are you?")); assertEquals("12 PYRAMID ST.", standardizer.convertValue("12 pyramid st.")); assertEquals("12 PYRAMID ST.", standardizer.convertValue("12 PYRAMID ST.")); assertEquals("", standardizer.convertValue("")); }