DefaultPropertySourceSnapshot implements PropertySource, Serializable { @Override public PropertyValue get(String key) { return this.properties.get(key); } DefaultPropertySourceSnapshot(PropertySource propertySource);  DefaultPropertySourceSnapshot(PropertySource propertySource, Iterable<String> keys); static DefaultPropertySourceSnapshot of(PropertySource propertySource); static DefaultPropertySourceSnapshot of(PropertySource propertySource, Iterable<String> keys); Set<String> getKeys(); @Override String getName(); int getOrdinal(); long getFrozenAt(); @Override PropertyValue get(String key); @Override Map<String, PropertyValue> getProperties(); @Override boolean equals(Object o); @Override int hashCode(); @Override String toString();  }
@Test public void testGet() throws Exception { PropertySource ps = DefaultPropertySourceSnapshot.of(MY_PS); assertThat(ps).isNotNull(); for (Map.Entry<String, PropertyValue> e : MY_PS.getProperties().entrySet()) { assertThat(ps.get(e.getKey()).getValue()).isEqualTo(e.getValue().getValue()); } }