### Question:
MBeanSelector { boolean mayMergeWith(MBeanSelector other) { if (!Objects.equals(keyName, other.keyName)) return false; if (!Objects.equals(key, other.key)) return false; if (!Objects.equals(type, other.type)) return false; if (!Objects.equals(prefix, other.prefix)) return false; for (String key : nestedSelectors.keySet()) if (other.nestedSelectors.containsKey(key) && !mayMergeCorrespondingChildren(key, other)) return false; return true; } private  MBeanSelector(Map<String, Object> map); private  MBeanSelector(MBeanSelector first, MBeanSelector second); static MBeanSelector create(Map<String, Object> map); String getPrintableRequest(); String getRequest(); String getUrl(Protocol protocol, String host, int port); QueryType getQueryType();  }### Answer:
@Test public void whenLeafElementsHaveMatchingAttributes_mayCombine() { MBeanSelector selector1 = createLeaf("type:Type1", "prefix:#_", "key:name", "keyName:numbers", "first", "second"); MBeanSelector selector2 = createLeaf("type:Type1", "prefix:#_", "key:name", "keyName:numbers", "second", "third"); assertThat(selector1.mayMergeWith(selector2), is(true)); }
@Test public void whenLeafElementsHaveMisMatchedAttributes_mayNotCombine() { assertThat(createLeaf("keyName:numbers", "first", "second").mayMergeWith(createLeaf("second", "third")), is(false)); assertThat(createLeaf("prefix:_", "key:Name").mayMergeWith(createLeaf("prefix:_", "aValue")), is(false)); assertThat(createLeaf("key:_", "type:Name").mayMergeWith(createLeaf("key:_", "type:color")), is(false)); assertThat(createLeaf("prefix:__").mayMergeWith(createLeaf("prefix:asdf")), is(false)); }