test: recognises AND as keyword
test: recognises OR as keyword
test: recognises NOT as keyword
test: recognises "hello this is dog" as string
test: recognises -"hello this is dog" as negation with string
test: recognises ~100 as text with proximity
test: recognises "hello this is dog"~100 as string with proximity
test: recognises raw:"hello this is dog" as keyword
test: recognises raw:foo as"keyword'
test: recognises "(" as opening parenthesis
test: recognises ")" as closing parenthesis
test: recognises foo* as text with asterisk
test: recognises foo? as text with interro
test: recognises single word as text
 foo