@Override
  public @NotNull ObjectArrayAssert onProperty(@NotNull String propertyName) {
    isNotNull();
    if (actual.length == 0) {
      return new ObjectArrayAssert(new Object[0]);
    }
    List<Object> values = PropertySupport.instance().propertyValues(propertyName, newArrayList(actual));
    return new ObjectArrayAssert(values.toArray());
  }
@Override
  public @NotNull ObjectArrayAssert onProperty(@NotNull String propertyName) {
    isNotNull();
    if (actual.length == 0) {
      return new ObjectArrayAssert(new Object[0]);
    }
    List<Object> values = PropertySupport.instance().propertyValues(propertyName, newArrayList(actual));
    return new ObjectArrayAssert(values.toArray());
  }
@ Override public @ NotNull ObjectArrayAssert onProperty ( @ NotNull String propertyName ) { isNotNull ( ) ; if ( actual . length == 0 ) { return new ObjectArrayAssert ( new Object [ 0 ] ) ; } List < Object > values = PropertySupport . instance ( ) . propertyValues ( propertyName , newArrayList ( actual ) ) ; return new ObjectArrayAssert ( values . toArray ( ) ) ; }
Creates a new instance of {@link ObjectArrayAssert} whose target array contains the values of the
given property name from the elements of this {@code ObjectArrayAssert}'s array. Property access works with both
simple properties like {@code Person.age} and nested properties {@code Person.father.age}.
<p/>
For example, let's say we have a array of {@code Person} objects and you want to verify their age:
<pre>
assertThat(persons).onProperty(&quot;age&quot;).containsOnly(25, 16, 44, 37); // simple property
assertThat(persons).onProperty("father.age").containsOnly(55, 46, 74, 62); // nested property

@param propertyName the name of the property to extract values from the actual array to build a new
{@code ObjectArrayAssert}.
@return a new {@code ObjectArrayAssert} containing the values of the given property name from the elements of this
{@code ObjectArrayAssert}'s array.
@throws AssertionError     if the actual array is {@code null}.
@throws IntrospectionError if an element in the given array does not have a matching property.
@since 1.3
Creates a new instance of { @link ObjectArrayAssert } whose target array contains the values of the given property name from the elements of this { @code ObjectArrayAssert } s array . Property access works with both simple properties like { @code Person . age } and nested properties { @code Person . father . age } . <p / > For example let s say we have a array of { @code Person } objects and you want to verify their age : <pre > assertThat ( persons ) . onProperty ( &quot ; age&quot ; ) . containsOnly ( 25 16 44 37 ) ; // simple property assertThat ( persons ) . onProperty ( father . age ) . containsOnly ( 55 46 74 62 ) ; // nested property