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schema_test.go
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schema_test.go
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package huma_test
import (
"bytes"
"encoding/json"
"math/bits"
"net"
"net/netip"
"net/url"
"reflect"
"strconv"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/danielgtaylor/huma/v2"
)
type RecursiveChildKey struct {
Key string `json:"key"`
Self *RecursiveChildKey `json:"self,omitempty"`
}
type RecursiveChild struct {
RecursiveChildLoop
}
type RecursiveChildLoop struct {
*RecursiveChild
Slice []*RecursiveChildLoop `json:"slice"`
Array [1]*RecursiveChildLoop `json:"array"`
Map map[RecursiveChildKey]RecursiveChildLoop `json:"map"`
ByValue RecursiveChildKey `json:"byValue"`
ByRef *RecursiveChildKey `json:"byRef"`
}
type EmbeddedChild struct {
// This one should be ignored as it is overridden by `Embedded`.
Value string `json:"value" doc:"old doc"`
}
type Embedded struct {
EmbeddedChild
Value string `json:"value" doc:"new doc"`
}
type CustomSchema struct{}
func (c CustomSchema) Schema(r huma.Registry) *huma.Schema {
return &huma.Schema{
Type: "string",
}
}
var _ huma.SchemaProvider = CustomSchema{}
type BadRefSchema struct{}
func (c BadRefSchema) Schema(r huma.Registry) *huma.Schema {
return &huma.Schema{
Ref: "bad",
}
}
var _ huma.SchemaProvider = BadRefSchema{}
type TypedArrayWithCustomDesc [4]float64
func (t *TypedArrayWithCustomDesc) TransformSchema(r huma.Registry, s *huma.Schema) *huma.Schema {
s.Description = "custom description"
return s
}
func TestSchema(t *testing.T) {
bitSize := strconv.Itoa(bits.UintSize)
cases := []struct {
name string
input any
expected string
panics string
}{
{
name: "bool",
input: true,
expected: `{"type": "boolean"}`,
},
{
name: "bool-pointer",
input: Ptr(true),
expected: `{"type": ["boolean", "null"]}`,
},
{
name: "int",
input: 1,
expected: `{"type": "integer", "format": "int` + bitSize + `"}`,
},
{
name: "int32",
input: int32(1),
expected: `{"type": "integer", "format": "int32"}`,
},
{
name: "int64",
input: int64(1),
expected: `{"type": "integer", "format": "int64"}`,
},
{
name: "uint",
input: uint(1),
expected: `{"type": "integer", "format": "int` + bitSize + `", "minimum": 0}`,
},
{
name: "uint32",
input: uint32(1),
expected: `{"type": "integer", "format": "int32", "minimum": 0}`,
},
{
name: "uint64",
input: uint64(1),
expected: `{"type": "integer", "format": "int64", "minimum": 0}`,
},
{
name: "float64",
input: 1.0,
expected: `{"type": "number", "format": "double"}`,
},
{
name: "float32",
input: float32(1.0),
expected: `{"type": "number", "format": "float"}`,
},
{
name: "string",
input: "test",
expected: `{"type": "string"}`,
},
{
name: "time",
input: time.Now(),
expected: `{"type": "string", "format": "date-time"}`,
},
{
name: "time-pointer",
input: Ptr(time.Now()),
expected: `{"type": ["string", "null"], "format": "date-time"}`,
},
{
name: "url",
input: url.URL{},
expected: `{"type": "string", "format": "uri"}`,
},
{
name: "ip",
input: net.IPv4(127, 0, 0, 1),
expected: `{"type": "string", "format": "ipv4"}`,
},
{
name: "ipAddr",
input: netip.AddrFrom4([4]byte{127, 0, 0, 1}),
expected: `{"type": "string", "format": "ipv4"}`,
},
{
name: "json.RawMessage",
input: &json.RawMessage{},
expected: `{}`,
},
{
name: "bytes",
input: []byte("test"),
expected: `{"type": "string", "contentEncoding": "base64"}`,
},
{
name: "array",
input: [2]int{1, 2},
expected: `{"type": "array", "items": {"type": "integer", "format": "int64"}, "minItems": 2, "maxItems": 2}`,
},
{
name: "slice",
input: []int{1, 2, 3},
expected: `{"type": "array", "items": {"type": "integer", "format": "int64"}}`,
},
{
name: "map",
input: map[string]string{"foo": "bar"},
expected: `{"type": "object", "additionalProperties": {"type": "string"}}`,
},
{
name: "additionalProps",
input: struct {
_ struct{} `json:"-" additionalProperties:"true"`
Value string `json:"value"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"type": "string"
}
},
"required": ["value"],
"additionalProperties": true
}`,
},
{
name: "field-int",
input: struct {
Value int `json:"value" minimum:"1" exclusiveMinimum:"0" maximum:"10" exclusiveMaximum:"11" multipleOf:"2"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"type": "integer",
"format": "int64",
"minimum": 1,
"exclusiveMinimum": 0,
"maximum": 10,
"exclusiveMaximum": 11,
"multipleOf": 2
}
},
"required": ["value"],
"additionalProperties": false
}`,
},
{
name: "field-string",
input: struct {
Value string `json:"value" minLength:"1" maxLength:"10" pattern:"^foo$" format:"foo" encoding:"bar"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"type": "string",
"minLength": 1,
"maxLength": 10,
"pattern": "^foo$",
"format": "foo",
"contentEncoding": "bar"
}
},
"required": ["value"],
"additionalProperties": false
}`,
},
{
name: "field-array",
input: struct {
Value []int `json:"value" minItems:"1" maxItems:"10" uniqueItems:"true"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"type": "array",
"minItems": 1,
"maxItems": 10,
"uniqueItems": true,
"items": {"type": "integer", "format": "int64"}
}
},
"required": ["value"],
"additionalProperties": false
}`,
},
{
name: "field-map",
input: struct {
Value map[string]string `json:"value" minProperties:"2" maxProperties:"5"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"type": "object",
"minProperties": 2,
"maxProperties": 5,
"additionalProperties": {
"type": "string"
}
}
},
"required": ["value"],
"additionalProperties": false
}`,
},
{
name: "field-enum",
input: struct {
Value string `json:"value" enum:"one,two"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"type": "string",
"enum": ["one", "two"]
}
},
"required": ["value"],
"additionalProperties": false
}`,
},
{
name: "field-array-enum",
input: struct {
Value []int `json:"value" enum:"1,2,3,5,8,11"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"type": "array",
"items": {
"type": "integer",
"format": "int64",
"enum": [1, 2, 3, 5, 8, 11]
}
}
},
"required": ["value"],
"additionalProperties": false
}`,
},
{
name: "field-readonly",
input: struct {
Value string `json:"value" readOnly:"true" writeOnly:"false"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"type": "string",
"readOnly": true
}
},
"additionalProperties": false,
"required": ["value"]
}`,
},
{
name: "field-readonly-struct",
input: struct {
Value struct {
Foo string `json:"foo"`
} `json:"value" readOnly:"true"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"$ref": "#/components/schemas/ValueStruct",
"readOnly": true
}
},
"additionalProperties": false,
"required": ["value"]
}`,
},
{
name: "field-default-string",
input: struct {
Value string `json:"value" default:"foo"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"type": "string",
"default": "foo"
}
},
"additionalProperties": false,
"required": ["value"]
}`,
},
{
name: "field-default-string-pointer",
input: struct {
Value *string `json:"value,omitempty" default:"foo"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"type": "string",
"default": "foo"
}
},
"additionalProperties": false
}`,
},
{
name: "field-default-array-string",
input: struct {
Value []string `json:"value" default:"foo,bar"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"type": "array",
"items": {
"type": "string"
},
"default": ["foo", "bar"]
}
},
"additionalProperties": false,
"required": ["value"]
}`,
},
{
name: "field-default-array-int",
input: struct {
Value []int `json:"value" default:"[1,2]"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"type": "array",
"items": {
"type": "integer",
"format": "int64"
},
"default": [1, 2]
}
},
"additionalProperties": false,
"required": ["value"]
}`,
},
{
name: "field-default-duration",
input: struct {
Value time.Duration `json:"value" default:"5000"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"type": "integer",
"format": "int64",
"default": 5000
}
},
"additionalProperties": false,
"required": ["value"]
}`,
},
{
name: "field-optional-without-name",
input: struct {
Value string `json:",omitempty"`
}{},
expected: `{
"type": "object",
"properties": {
"Value": {
"type": "string"
}
},
"additionalProperties": false
}`,
},
{
name: "field-example-custom",
input: struct {
Value CustomSchema `json:"value" example:"foo"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"type": "string",
"examples": ["foo"]
}
},
"additionalProperties": false,
"required": ["value"]
}`,
},
{
name: "field-example-custom-pointer",
input: struct {
Value *CustomSchema `json:"value" example:"foo"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"type": "string",
"examples": ["foo"]
}
},
"additionalProperties": false,
"required": ["value"]
}`,
},
{
name: "field-enum-custom",
input: struct {
Value OmittableNullable[string] `json:"value,omitempty" enum:"foo,bar"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"type": ["string", "null"],
"enum": ["foo", "bar"]
}
},
"additionalProperties": false
}`,
},
{
name: "field-any",
input: struct {
Value any `json:"value" doc:"Some value"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"description": "Some value"
}
},
"additionalProperties": false,
"required": ["value"]
}`,
},
{
name: "field-dependent-required",
input: struct {
Value string `json:"value,omitempty" dependentRequired:"dependent"`
Dependent string `json:"dependent,omitempty"`
Ignored string `json:"ignored,omitempty" dependentRequired:""`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"type": "string"
},
"dependent": {
"type": "string"
},
"ignored": {
"type": "string"
}
},
"dependentRequired": {
"value": ["dependent"]
},
"additionalProperties": false
}`,
},
{
// Bad ref should not panic, but should be ignored. These could be valid
// custom schemas that Huma won't understand.
name: "field-custom-bad-ref",
input: struct {
Value BadRefSchema `json:"value" example:"true"`
Value2 struct {
Foo BadRefSchema `json:"foo"`
} `json:"value2" example:"{\"foo\": true}"`
}{},
expected: `{
"type": "object",
"properties": {
"value": {
"$ref": "bad"
},
"value2": {
"$ref": "#/components/schemas/Value2Struct",
"examples": [{"foo": true}]
}
},
"additionalProperties": false,
"required": ["value", "value2"]
}`,
},
{
name: "field-skip",
input: struct {
// Filtered out from JSON tag
Value1 string `json:"-"`
// Filtered because it's private
value2 string
// Filtered due to being an unsupported type
Value3 func()
// Filtered due to being hidden
Value4 string `json:"value4,omitempty" hidden:"true"`
}{},
expected: `{
"type": "object",
"additionalProperties": false
}`,
},
{
name: "field-embed",
input: struct {
// Because this is embedded, the fields should be merged into
// the parent object.
*Embedded
Value2 string `json:"value2"`
}{},
expected: `{
"type": "object",
"additionalProperties": false,
"required": ["value2", "value"],
"properties": {
"value": {
"type": "string",
"description": "new doc"
},
"value2": {
"type": "string"
}
}
}`,
},
{
name: "field-embed-override",
input: struct {
Embedded
Value string `json:"override" doc:"override"`
}{},
expected: `{
"type": "object",
"additionalProperties": false,
"required": ["override"],
"properties": {
"override": {
"type": "string",
"description": "override"
}
}
}`,
},
{
name: "field-pointer-example",
input: struct {
Int *int64 `json:"int" example:"123"`
Str *string `json:"str" example:"foo"`
}{},
expected: `{
"type": "object",
"additionalProperties": false,
"properties": {
"int": {
"type": ["integer", "null"],
"format": "int64",
"examples": [123]
},
"str": {
"type": ["string", "null"],
"examples": ["foo"]
}
},
"required": ["int", "str"]
}`,
},
{
name: "field-nullable",
input: struct {
Int *int64 `json:"int" nullable:"true"`
}{},
expected: `{
"type": "object",
"additionalProperties": false,
"properties": {
"int": {
"type": ["integer", "null"],
"format": "int64"
}
},
"required": ["int"]
}`,
},
{
name: "field-nullable-struct",
input: struct {
Field struct {
_ struct{} `json:"-" nullable:"true"`
Foo string `json:"foo"`
} `json:"field"`
}{},
expected: `{
"type": "object",
"additionalProperties": false,
"properties": {
"field": {
"$ref": "#/components/schemas/FieldStruct"
}
},
"required": ["field"]
}`,
},
{
name: "recursive-embedded-structure",
input: RecursiveChild{},
expected: `{
"additionalProperties":false,
"properties":{
"array":{
"items":{
"$ref":"#/components/schemas/RecursiveChildLoop"
},
"maxItems":1,
"minItems":1,
"type":"array"
},
"byRef":{
"$ref":"#/components/schemas/RecursiveChildKey"
},
"byValue":{
"$ref":"#/components/schemas/RecursiveChildKey"
},
"map":{
"additionalProperties":{
"$ref":"#/components/schemas/RecursiveChildLoop"
},
"type":"object"
},
"slice":{
"items":{
"$ref":"#/components/schemas/RecursiveChildLoop"
},
"type":"array"}
},
"required":["slice","array","map","byValue", "byRef"],
"type":"object"
}`,
},
{
name: "panic-bool",
input: struct {
Value string `json:"value" readOnly:"bad"`
}{},
panics: "invalid bool tag 'readOnly' for field 'Value': bad",
},
{
name: "panic-int",
input: struct {
Value string `json:"value" minLength:"bad"`
}{},
panics: "invalid int tag 'minLength' for field 'Value': bad (strconv.Atoi: parsing \"bad\": invalid syntax)",
},
{
name: "panic-float",
input: struct {
Value int `json:"value" minimum:"bad"`
}{},
panics: "invalid float tag 'minimum' for field 'Value': bad (strconv.ParseFloat: parsing \"bad\": invalid syntax)",
},
{
name: "panic-json",
input: struct {
Value int `json:"value" default:"bad"`
}{},
panics: `invalid integer tag value 'bad' for field 'Value': invalid character 'b' looking for beginning of value`,
},
{
name: "panic-json-bool",
input: struct {
Value bool `json:"value" default:"123"`
}{},
panics: `invalid boolean tag value '123' for field 'Value': schema is invalid`,
},
{
name: "panic-json-int",
input: struct {
Value int `json:"value" default:"true"`
}{},
panics: `invalid number tag value 'true' for field 'Value': schema is invalid`,
},
{
name: "panic-json-int2",
input: struct {
Value int `json:"value" default:"1.23"`
}{},
panics: `invalid integer tag value '1.23' for field 'Value': schema is invalid`,
},
{
name: "panic-json-array",
input: struct {
Value []int `json:"value" default:"true"`
}{},
panics: `invalid array tag value 'true' for field 'Value': schema is invalid`,
},
{
name: "panic-json-array-value",
input: struct {
Value []string `json:"value" default:"[true]"`
}{},
panics: `invalid string tag value 'true' for field 'Value[0]': schema is invalid`,
},
{
name: "panic-json-array-value",
input: struct {
Value []int `json:"value" default:"[true]"`
}{},
panics: `invalid number tag value 'true' for field 'Value[0]': schema is invalid`,
},
{
name: "panic-json-object",
input: struct {
Value struct {
Foo string `json:"foo"`
} `json:"value" default:"true"`
}{},
panics: `invalid object tag value 'true' for field 'Value': schema is invalid`,
},
{
name: "panic-json-object-field",
input: struct {
Value struct {
Foo string `json:"foo"`
} `json:"value" default:"{\"foo\": true}"`
}{},
panics: `invalid string tag value 'true' for field 'Value.foo': schema is invalid`,
},
{
name: "panic-dependent-required",
input: struct {
Value1 string `json:"value1,omitempty" dependentRequired:"missing1,missing2"`
Value2 string `json:"value2,omitempty" dependentRequired:"missing2"`
Value3 string `json:"value3,omitempty" dependentRequired:"dependent"`
Dependent string `json:"dependent,omitempty"`
}{},
panics: `dependent field 'missing1' for field 'value1' does not exist; dependent field 'missing2' for field 'value1' does not exist; dependent field 'missing2' for field 'value2' does not exist`,
},
{
name: "panic-nullable-struct",
input: struct {
Value *struct {
Foo string `json:"foo"`
} `json:"value" nullable:"true"`
}{},
panics: `nullable is not supported for field 'Value' which is type '#/components/schemas/ValueStruct'`,
},
{
name: "field-custom-array",
input: struct {
Value TypedArrayWithCustomDesc `json:"value"`
}{},
expected: ` {
"additionalProperties":false,
"properties":{
"value":{
"description":"custom description",
"items":{
"format":"double",
"type":"number"
},
"maxItems":4,
"minItems":4,
"type":"array"
}
},
"required":["value"],
"type":"object"
}`,
},
{
name: "field-ptr-to-custom-array",
input: struct {
Value *TypedArrayWithCustomDesc `json:"value"`
}{},
expected: ` {
"additionalProperties":false,
"properties":{
"value":{
"description":"custom description",
"items":{
"format":"double",
"type":"number"
},
"maxItems":4,
"minItems":4,
"type":"array"
}
},
"required":["value"],
"type":"object"
}`,
},
}
for _, c := range cases {
t.Run(c.name, func(t *testing.T) {
r := huma.NewMapRegistry("#/components/schemas/", huma.DefaultSchemaNamer)
if c.panics != "" {
assert.PanicsWithError(t, c.panics, func() {
r.Schema(reflect.TypeOf(c.input), false, "")
})
} else {
s := r.Schema(reflect.TypeOf(c.input), false, "")
b, _ := json.Marshal(s)
assert.JSONEq(t, c.expected, string(b))
}
})
}
}
type GreetingInput struct {
ID string `path:"id"`
}
type TestInputSub struct {
Num int `json:"num" minimum:"1"`
}
type TestInput struct {
Name string `json:"name" minLength:"1"`
Sub TestInputSub `json:"sub"`
}
type RecursiveInput struct {
Value *RecursiveInput
}
func TestSchemaOld(t *testing.T) {
r := huma.NewMapRegistry("#/components/schemas/", huma.DefaultSchemaNamer)
s := r.Schema(reflect.TypeOf(GreetingInput{}), false, "")
// fmt.Printf("%+v\n", s)
assert.Equal(t, "object", s.Type)
assert.Len(t, s.Properties, 1)
assert.Equal(t, "string", s.Properties["ID"].Type)
r.Schema(reflect.TypeOf(RecursiveInput{}), false, "")
s2 := r.Schema(reflect.TypeOf(TestInput{}), false, "")
pb := huma.NewPathBuffer(make([]byte, 0, 128), 0)
res := huma.ValidateResult{}
huma.Validate(r, s2, pb, huma.ModeReadFromServer, map[string]any{
"name": "foo",
"sub": map[string]any{
"num": 1.0,
},
}, &res)
assert.Empty(t, res.Errors)
// b, _ := json.MarshalIndent(r.Map(), "", " ")
// fmt.Println(string(b))
}
func TestSchemaGenericNaming(t *testing.T) {
type SchemaGeneric[T any] struct {
Value T `json:"value"`
}
r := huma.NewMapRegistry("#/components/schemas/", huma.DefaultSchemaNamer)
s := r.Schema(reflect.TypeOf(SchemaGeneric[int]{}), true, "")
b, _ := json.Marshal(s)
assert.JSONEq(t, `{
"$ref": "#/components/schemas/SchemaGenericInt"
}`, string(b))
}
func TestSchemaGenericNamingFromModule(t *testing.T) {
type SchemaGeneric[T any] struct {
Value T `json:"value"`
}
r := huma.NewMapRegistry("#/components/schemas/", huma.DefaultSchemaNamer)
s := r.Schema(reflect.TypeOf(SchemaGeneric[time.Time]{}), true, "")
b, _ := json.Marshal(s)
assert.JSONEq(t, `{
"$ref": "#/components/schemas/SchemaGenericTime"
}`, string(b))
}
type OmittableNullable[T any] struct {
Sent bool
Null bool
Value T
}
func (o *OmittableNullable[T]) UnmarshalJSON(b []byte) error {
if len(b) > 0 {
o.Sent = true
if bytes.Equal(b, []byte("null")) {
o.Null = true
return nil
}
return json.Unmarshal(b, &o.Value)
}
return nil