As a user writing a search query
I can write keywords, operators and values
In order to execute a valid query.
**Scenario 1**
Given I'm writing a query
When i write the query "State=read" AND OR "Date=2016/03/18", it is not a valid query
Then the query will be not execute.
**Scenario 2**
Given I'm writing a query
When i write the query "State=read" AND "Date=2016/03/18", it is a valid query
Then the query will be execute.
**Scenario 3**
Given I'm writing a query
When i write the query "State=read" AND, it is not a valid query
Then the query will be not execute.
**Scenario 4**
Given I'm writing a query
When i write the query "Date>John", it is not a valid query
Then the query will be not execute.