[
    (src: "{{ var }}", exp: [(Expr((false, false), (("var"), (lo:3, hi:6))), (lo:0, hi:9))]),
    (src: "{{ fun() }}", exp: [(Expr((false, false), (("fun()"), (lo:3, hi:8))), (lo:0, hi:11))]),
    (src: "{{ fun(|a| a) }}", exp: [(Expr((false, false), (("fun(|a| a)"), (lo:3, hi:13))), (lo:0, hi:16))]),
    (src: "{{ fun(|a| { {a} }) }}", exp: [(Expr((false, false), (("fun(|a| {{a}})"), (lo:3, hi:19))), (lo:0, hi:22))])
]