parser:
./a%20b
./"a%20b"
text interpolation and escapes
projection by expression unit tests
success/
    operators/
        PrecedenceAll1 a ? b || c + d ++ e # f && g ∧ h ⫽ i ⩓ j * k == l != m n.o
        PrecedenceAll2 a b != c == d * e ⩓ f ⫽ g ∧ h && i # j ++ k + l || m ? n
    LetNoAnnot let x = y in e
    LetAnnot let x: T = y in e
failure/
    AssertNoAnnotation assert

binary decoding:
decode old-style optional literals ?

import:
success/
    recover type error
    recover recursive import error
failure/
    don't recover cycle

normalization:
variables across import boundaries
    Text/show ""
    TextLitNested1 "${""}${x}"
    TextLitNested2 "${"${x}"}"
    TextLitNested3 "${"${""}"}${x}"

typecheck:
something that involves destructuring a recordtype after merge
add some of the more complicated Prelude tests back, like List/enumerate
failure on old-style optional literal
failure/
    merge { x = λ(x : Bool) → x } (< x: Bool | y: Natural >.x True)
    merge { x = λ(_ : Bool) → _, y = 1 } < x = True | y >
    merge { x = True, y = 1 } < x | y >.x
    merge {x=...,y=...} <x>.x
    merge {x=...,y=...} <x:T>.x
    MergeBoolIsNotUnion merge x True
    MergeOptionalIsNotUnion merge x (Some 1)
    SortInLet let x = Sort in 1

equivalence: