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fromJson: support object variants (#14694)

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This commit is contained in:
Timothee Cour
2020-06-24 09:03:01 -07:00
committed by GitHub
parent a3ae52de1a
commit 37081e2945
2 changed files with 126 additions and 15 deletions
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53
tests/stdlib/tjsonutils.nim
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@@ -9,6 +9,9 @@ proc testRoundtrip[T](t: T, expected: string) =
let j = t.toJson
doAssert $j == expected, $j
doAssert j.jsonTo(T).toJson == j
var t2: T
t2.fromJson(j)
doAssert t2.toJson == j
import tables
import strtabs
@@ -66,5 +69,55 @@ template fn() =
doAssert b2.ord == 1 # explains the `1`
testRoundtrip(a): """[1,2,3]"""
block: # case object
type Foo = object
x0: float
case t1: bool
of true: z1: int8
of false: z2: uint16
x1: string
testRoundtrip(Foo(t1: true, z1: 5, x1: "bar")): """{"x0":0.0,"t1":true,"z1":5,"x1":"bar"}"""
testRoundtrip(Foo(x0: 1.5, t1: false, z2: 6)): """{"x0":1.5,"t1":false,"z2":6,"x1":""}"""
type PFoo = ref Foo
testRoundtrip(PFoo(x0: 1.5, t1: false, z2: 6)): """{"x0":1.5,"t1":false,"z2":6,"x1":""}"""
block: # ref case object
type Foo = ref object
x0: float
case t1: bool
of true: z1: int8
of false: z2: uint16
x1: string
testRoundtrip(Foo(t1: true, z1: 5, x1: "bar")): """{"x0":0.0,"t1":true,"z1":5,"x1":"bar"}"""
testRoundtrip(Foo(x0: 1.5, t1: false, z2: 6)): """{"x0":1.5,"t1":false,"z2":6,"x1":""}"""
block: # generic case object
type Foo[T] = ref object
x0: float
case t1: bool
of true: z1: int8
of false: z2: uint16
x1: string
testRoundtrip(Foo[float](t1: true, z1: 5, x1: "bar")): """{"x0":0.0,"t1":true,"z1":5,"x1":"bar"}"""
testRoundtrip(Foo[int](x0: 1.5, t1: false, z2: 6)): """{"x0":1.5,"t1":false,"z2":6,"x1":""}"""
# sanity check: nesting inside a tuple
testRoundtrip((Foo[int](x0: 1.5, t1: false, z2: 6), "foo")): """[{"x0":1.5,"t1":false,"z2":6,"x1":""},"foo"]"""
block: # case object: 2 discriminants, `when` branch, range discriminant
type Foo[T] = object
case t1: bool
of true:
z1: int8
of false:
z2: uint16
when T is float:
case t2: range[0..3]
of 0: z3: int8
of 2,3: z4: uint16
else: discard
testRoundtrip(Foo[float](t1: true, z1: 5, t2: 3, z4: 12)): """{"t1":true,"z1":5,"t2":3,"z4":12}"""
testRoundtrip(Foo[int](t1: false, z2: 7)): """{"t1":false,"z2":7}"""
# pending https://github.com/nim-lang/Nim/issues/14698, test with `type Foo[T] = ref object`
static: fn()
fn()