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v/vlib/x/json2/json2_test.v

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import x.json2
enum JobTitle {
manager
executive
worker
}
struct Employee {
pub mut:
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name string
age int
salary f32
title JobTitle
}
fn (e Employee) to_json() string {
mut mp := map[string]json2.Any{}
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mp['name'] = e.name
mp['age'] = e.age
mp['salary'] = e.salary
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mp['title'] = int(e.title)
/*
$for field in Employee.fields {
d := e.$(field.name)
$if field.typ is JobTitle {
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mp[field.name] = json.encode<int>(d)
} $else {
mp[field.name] = d
}
}
*/
return mp.str()
}
fn (mut e Employee) from_json(any json2.Any) {
mp := any.as_map()
e.name = mp['name'].str()
e.age = mp['age'].int()
e.salary = mp['salary'].f32()
e.title = JobTitle(mp['title'].int())
}
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fn test_simple() {
x := Employee{'Peter', 28, 95000.5, .worker}
s := json2.encode<Employee>(x)
eprintln('Employee x: $s')
assert s == '{"name":"Peter","age":28,"salary":95000.5,"title":2}'
y := json2.decode<Employee>(s) or {
println(err)
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assert false
return
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}
eprintln('Employee y: $y')
assert y.name == 'Peter'
assert y.age == 28
assert y.salary == 95000.5
assert y.title == .worker
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}
fn test_fast_raw_decode() {
s := '{"name":"Peter","age":28,"salary":95000.5,"title":2}'
o := json2.fast_raw_decode(s) or {
assert false
json2.Any(json2.null)
}
str := o.str()
assert str == '{"name":"Peter","age":"28","salary":"95000.5","title":"2"}'
}
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fn test_character_unescape() {
message := r'{
"newline": "new\nline",
"tab": "\ttab",
"backslash": "back\\slash",
"quotes": "\"quotes\"",
"slash":"\/dev\/null"
}'
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mut obj := json2.raw_decode(message) or {
println(err)
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assert false
return
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}
lines := obj.as_map()
eprintln('$lines')
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assert lines['newline'].str() == 'new\nline'
assert lines['tab'].str() == '\ttab'
assert lines['backslash'].str() == 'back\\slash'
assert lines['quotes'].str() == '"quotes"'
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assert lines['slash'].str() == '/dev/null'
}
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struct User2 {
pub mut:
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age int
nums []int
}
fn (mut u User2) from_json(an json2.Any) {
mp := an.as_map()
mut js_field_name := ''
$for field in User.fields {
js_field_name = field.name
for attr in field.attrs {
if attr.starts_with('json:') {
js_field_name = attr.all_after('json:').trim_left(' ')
break
}
}
match field.name {
'age' { u.age = mp[js_field_name].int() }
'nums' { u.nums = mp[js_field_name].arr().map(it.int()) }
else {}
}
}
}
// User struct needs to be `pub mut` for now in order to access and manipulate values
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struct User {
pub mut:
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age int
nums []int
last_name string [json: lastName]
is_registered bool [json: IsRegistered]
typ int [json: 'type']
pets string [json: 'pet_animals'; raw]
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}
fn (mut u User) from_json(an json2.Any) {
mp := an.as_map()
mut js_field_name := ''
$for field in User.fields {
// FIXME: C error when initializing js_field_name inside comptime for
js_field_name = field.name
for attr in field.attrs {
if attr.starts_with('json:') {
js_field_name = attr.all_after('json:').trim_left(' ')
break
}
}
match field.name {
'age' { u.age = mp[js_field_name].int() }
'nums' { u.nums = mp[js_field_name].arr().map(it.int()) }
'last_name' { u.last_name = mp[js_field_name].str() }
'is_registered' { u.is_registered = mp[js_field_name].bool() }
'typ' { u.typ = mp[js_field_name].int() }
'pets' { u.pets = mp[js_field_name].str() }
else {}
}
}
}
fn (u User) to_json() string {
// TODO: derive from field
mut mp := {
'age': json2.Any(u.age)
}
mp['nums'] = u.nums.map(json2.Any(it))
mp['lastName'] = u.last_name
mp['IsRegistered'] = u.is_registered
mp['type'] = u.typ
mp['pet_animals'] = u.pets
return mp.str()
}
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fn test_parse_user() {
s := '{"age": 10, "nums": [1,2,3], "type": 1, "lastName": "Johnson", "IsRegistered": true, "pet_animals": {"name": "Bob", "animal": "Dog"}}'
u2 := json2.decode<User2>(s) or {
println(err)
assert false
return
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}
println(u2)
u := json2.decode<User>(s) or {
println(err)
assert false
return
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}
assert u.age == 10
assert u.last_name == 'Johnson'
assert u.is_registered == true
assert u.nums.len == 3
assert u.nums[0] == 1
assert u.nums[1] == 2
assert u.nums[2] == 3
assert u.typ == 1
assert u.pets == '{"name":"Bob","animal":"Dog"}'
}
fn test_encode_user() {
usr := User{
age: 10
nums: [1, 2, 3]
last_name: 'Johnson'
is_registered: true
typ: 0
pets: 'foo'
}
expected := '{"age":10,"nums":[1,2,3],"lastName":"Johnson","IsRegistered":true,"type":0,"pet_animals":"foo"}'
out := json2.encode<User>(usr)
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assert out == expected
}
struct Color {
pub mut:
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space string
point string [raw]
}
fn (mut c Color) from_json(an json2.Any) {
mp := an.as_map()
$for field in Color.fields {
match field.name {
'space' { c.space = mp[field.name].str() }
'point' { c.point = mp[field.name].str() }
else {}
}
}
}
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fn test_raw_json_field() {
color := json2.decode<Color>('{"space": "YCbCr", "point": {"Y": 123}}') or {
assert false
Color{}
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}
assert color.point == '{"Y":123}'
assert color.space == 'YCbCr'
}
/*
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struct City {
name string
}
struct Country {
cities []City
name string
}
fn test_struct_in_struct() {
country := json.decode(Country, '{ "name": "UK", "cities": [{"name":"London"}, {"name":"Manchester"}]}') or {
assert false
exit(1)
}
assert country.name == 'UK'
assert country.cities.len == 2
assert country.cities[0].name == 'London'
assert country.cities[1].name == 'Manchester'
println(country.cities)
}
*/
fn test_encode_map() {
expected := '{"one":1,"two":2,"three":3,"four":4}'
numbers := {
'one': json2.Any(1)
'two': json2.Any(2)
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'three': json2.Any(3)
'four': json2.Any(4)
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}
out := numbers.str()
assert out == expected
}
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/*
fn test_parse_map() {
expected := {
'one': 1
'two': 2
'three': 3
'four': 4
}
out := json.decode<map[string]int>('{"one":1,"two":2,"three":3,"four":4}') or {
assert false
r := {
'': 0
}
r
}
println(out)
assert out == expected
}
struct Data {
countries []Country
users map[string]User
extra map[string]map[string]int
}
fn test_nested_type() {
data_expected := '{"countries":[{"cities":[{"name":"London"},{"name":"Manchester"}],"name":"UK"},{"cities":[{"name":"Donlon"},{"name":"Termanches"}],"name":"KU"}],"users":{"Foo":{"age":10,"nums":[1,2,3],"lastName":"Johnson","IsRegistered":true,"type":0,"pet_animals":"little foo"},"Boo":{"age":20,"nums":[5,3,1],"lastName":"Smith","IsRegistered":false,"type":4,"pet_animals":"little boo"}},"extra":{"2":{"n1":2,"n2":4,"n3":8,"n4":16},"3":{"n1":3,"n2":9,"n3":27,"n4":81}}}'
data := Data{
countries: [
Country{
name: 'UK'
cities: [City{'London'},
City{'Manchester'},
]
},
Country{
name: 'KU'
cities: [City{'Donlon'},
City{'Termanches'},
]
},
]
users: {
'Foo': User{
age: 10
nums: [1, 2, 3]
last_name: 'Johnson'
is_registered: true
typ: 0
pets: 'little foo'
},
'Boo': User{
age: 20
nums: [5, 3, 1]
last_name: 'Smith'
is_registered: false
typ: 4
pets: 'little boo'
}
},
extra: {
'2': {
'n1': 2
'n2': 4
'n3': 8
'n4': 16
},
'3': {
'n1': 3
'n2': 9
'n3': 27
'n4': 81
},
}
}
out := json.encode(data)
println(out)
assert out == data_expected
data2 := json.decode(Data, data_expected) or {
assert false
Data{}
}
assert data2.countries.len == data.countries.len
for i in 0..1 {
assert data2.countries[i].name == data.countries[i].name
assert data2.countries[i].cities.len == data.countries[i].cities.len
for j in 0..1 {
assert data2.countries[i].cities[j].name == data.countries[i].cities[j].name
}
}
for key, user in data.users {
assert data2.users[key].age == user.age
assert data2.users[key].nums == user.nums
assert data2.users[key].last_name == user.last_name
assert data2.users[key].is_registered == user.is_registered
assert data2.users[key].typ == user.typ
// assert data2.users[key].pets == user.pets // TODO FIX
}
for k, v in data.extra {
for k2, v2 in v {
assert data2.extra[k][k2] == v2
}
}
}
fn test_errors() {
invalid_array := fn () {
data := '{"countries":[{"cities":[{"name":"London"},{"name":"Manchester"}],"name":"UK"},{"cities":{"name":"Donlon"},"name":"KU"}],"users":{"Foo":{"age":10,"nums":[1,2,3],"lastName":"Johnson","IsRegistered":true,"type":0,"pet_animals":"little foo"},"Boo":{"age":20,"nums":[5,3,1],"lastName":"Smith","IsRegistered":false,"type":4,"pet_animals":"little boo"}},"extra":{"2":{"n1":2,"n2":4,"n3":8,"n4":16},"3":{"n1":3,"n2":9,"n3":27,"n4":81}}}'
json.decode(Data, data) or {
println(err)
assert err.starts_with('Json element is not an array:')
return
}
assert false
}
invalid_object := fn() {
data := '{"countries":[{"cities":[{"name":"London"},{"name":"Manchester"}],"name":"UK"},{"cities":[{"name":"Donlon"},{"name":"Termanches"}],"name":"KU"}],"users":[{"age":10,"nums":[1,2,3],"lastName":"Johnson","IsRegistered":true,"type":0,"pet_animals":"little foo"},{"age":20,"nums":[5,3,1],"lastName":"Smith","IsRegistered":false,"type":4,"pet_animals":"little boo"}],"extra":{"2":{"n1":2,"n2":4,"n3":8,"n4":16},"3":{"n1":3,"n2":9,"n3":27,"n4":81}}}'
json.decode(Data, data) or {
println(err)
assert err.starts_with('Json element is not an object:')
return
}
assert false
}
invalid_array()
invalid_object()
}
*/