message: added mock of filteredprevsnap in order to test state diff
diff: @@ -31,6 +31,44 @@ export const filteredCurSnapMock = {
  },
  };
  +export const filteredPrevSnapMock = {
  + dummyAtom1: {
  + contents: {hello: [], hi: []},
  + nodeDeps: [],
  + nodeToNodeSubscriptions: [],
  + type: 'RecoilState',
  + },
  + listState: {
  + contents: [{text: 'list item'}, {text: 'list item'}, {text: 'list item'}],
  + nodeDeps: [],
  + nodeToNodeSubscriptions: ['selectorTest', 'stateLengths'],
  + type: 'RecoilState',
  + },
  + listState2: {
  + contents: [
  + {text: 'list item'},
  + {text: 'list item'},
  + {text: 'list item'},
  + {text: 'list item'},
  + ],
  + nodeDeps: [],
  + nodeToNodeSubscriptions: ['stateLengths'],
  + type: 'RecoilState',
  + },
  + selectorTest: {
  + contents: 'test',
  + nodeDeps: ['listState'],
  + nodeToNodeSubscriptions: [],
  + type: 'RecoilValueReadOnly',
  + },
  + stateLengths: {
  + contents: 6,
  + nodeDeps: ['listState', 'listState2'],
  + nodeToNodeSubscriptions: [],
  + type: 'RecoilValueReadOnly',
  + },
  +};
  +
  export const componentAtomTreeMock = {
  children: [
  {
  