@Test
  public void shouldUseExtendedBeanInfoWhenApplicable()
      throws NoSuchMethodException, SecurityException {
    // given a class with a non-void returning setter method
    @SuppressWarnings("unused")
    class C {
      public Object setFoo(String s) {
        return this;
      }

      public String getFoo() {
        return null;
      }
    }

    // CachedIntrospectionResults should delegate to ExtendedBeanInfo
    CachedIntrospectionResults results = CachedIntrospectionResults.forClass(C.class);
    BeanInfo info = results.getBeanInfo();
    PropertyDescriptor pd = null;
    for (PropertyDescriptor candidate : info.getPropertyDescriptors()) {
      if (candidate.getName().equals("foo")) {
        pd = candidate;
      }
    }

    // resulting in a property descriptor including the non-standard setFoo method
    assertThat(pd, notNullValue());
    assertThat(pd.getReadMethod(), equalTo(C.class.getMethod("getFoo")));
    assertThat(
        "No write method found for non-void returning 'setFoo' method. "
            + "Check to see if CachedIntrospectionResults is delegating to "
            + "ExtendedBeanInfo as expected",
        pd.getWriteMethod(),
        equalTo(C.class.getMethod("setFoo", String.class)));
  }
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 /** Obtain a lazily initializted CachedIntrospectionResults instance for the wrapped object. */
 private CachedIntrospectionResults getCachedIntrospectionResults() {
   Assert.state(this.object != null, "BeanWrapper does not hold a bean instance");
   if (this.cachedIntrospectionResults == null) {
     this.cachedIntrospectionResults = CachedIntrospectionResults.forClass(getWrappedClass());
   }
   return this.cachedIntrospectionResults;
 }
 /**
  * Set the class to introspect. Needs to be called when the target object changes.
  *
  * @param clazz the class to introspect
  */
 protected void setIntrospectionClass(Class clazz) {
   if (this.cachedIntrospectionResults == null
       || !this.cachedIntrospectionResults.getBeanClass().equals(clazz)) {
     this.cachedIntrospectionResults = CachedIntrospectionResults.forClass(clazz);
   }
 }