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validation_error_test.go
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package openapi3filter
import (
"bytes"
"context"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/http/httptest"
"testing"
"github.com/getkin/kin-openapi/openapi3"
"github.com/stretchr/testify/require"
)
func newPetstoreRequest(t *testing.T, method, path string, body io.Reader) *http.Request {
host := "petstore.swagger.io"
pathPrefix := "v2"
r, err := http.NewRequest(method, fmt.Sprintf("http://%s/%s%s", host, pathPrefix, path), body)
require.NoError(t, err)
r.Header.Set("Content-Type", "application/json")
r.Header.Set("Authorization", "Bearer magicstring")
r.Host = host
return r
}
type validationFields struct {
Handler http.Handler
SwaggerFile string
ErrorEncoder ErrorEncoder
}
type validationArgs struct {
r *http.Request
}
type validationTest struct {
name string
fields validationFields
args validationArgs
wantErr bool
wantErrBody string
wantErrReason string
wantErrSchemaReason string
wantErrSchemaPath string
wantErrSchemaValue interface{}
wantErrParam string
wantErrParamIn string
wantErrParseKind ParseErrorKind
wantErrParseValue interface{}
wantErrParseReason string
wantErrResponse *ValidationError
}
func getValidationTests(t *testing.T) []*validationTest {
badHost, _ := http.NewRequest(http.MethodGet, "http://unknown-host.com/v2/pet", nil)
badPath := newPetstoreRequest(t, http.MethodGet, "/watdis", nil)
badMethod := newPetstoreRequest(t, http.MethodTrace, "/pet", nil)
missingBody1 := newPetstoreRequest(t, http.MethodPost, "/pet", nil)
missingBody2 := newPetstoreRequest(t, http.MethodPost, "/pet", bytes.NewBufferString(``))
noContentType := newPetstoreRequest(t, http.MethodPost, "/pet", bytes.NewBufferString(`{}`))
noContentType.Header.Del("Content-Type")
noContentTypeNeeded := newPetstoreRequest(t, http.MethodGet, "/pet/findByStatus?status=sold", nil)
noContentTypeNeeded.Header.Del("Content-Type")
unknownContentType := newPetstoreRequest(t, http.MethodPost, "/pet", bytes.NewBufferString(`{}`))
unknownContentType.Header.Set("Content-Type", "application/xml")
unsupportedContentType := newPetstoreRequest(t, http.MethodPost, "/pet", bytes.NewBufferString(`{}`))
unsupportedContentType.Header.Set("Content-Type", "text/plain")
return []*validationTest{
//
// Basics
//
{
name: "error - unknown host",
args: validationArgs{
r: badHost,
},
wantErrReason: "Does not match any server",
wantErrResponse: &ValidationError{Status: http.StatusNotFound, Title: "Does not match any server"},
},
{
name: "error - unknown path",
args: validationArgs{
r: badPath,
},
wantErrReason: "Path was not found",
wantErrResponse: &ValidationError{Status: http.StatusNotFound, Title: "Path was not found"},
},
{
name: "error - unknown method",
args: validationArgs{
r: badMethod,
},
wantErrReason: "Path doesn't support the HTTP method",
// TODO: By HTTP spec, this should have an Allow header with what is allowed
// but kin-openapi doesn't provide us the requested method or path, so impossible to provide details
wantErrResponse: &ValidationError{Status: http.StatusMethodNotAllowed,
Title: "Path doesn't support the HTTP method"},
},
{
name: "error - missing body on POST",
args: validationArgs{
r: missingBody1,
},
wantErrBody: "Request body has an error: must have a value",
wantErrResponse: &ValidationError{Status: http.StatusBadRequest,
Title: "Request body has an error: must have a value"},
},
{
name: "error - empty body on POST",
args: validationArgs{
r: missingBody2,
},
wantErrBody: "Request body has an error: must have a value",
wantErrResponse: &ValidationError{Status: http.StatusBadRequest,
Title: "Request body has an error: must have a value"},
},
//
// Content-Type
//
{
name: "error - missing content-type on POST",
args: validationArgs{
r: noContentType,
},
wantErrReason: "header 'Content-Type' has unexpected value: \"\"",
wantErrResponse: &ValidationError{Status: http.StatusUnsupportedMediaType,
Title: "header 'Content-Type' is required"},
},
{
name: "error - unknown content-type on POST",
args: validationArgs{
r: unknownContentType,
},
wantErrReason: "failed to decode request body",
wantErrParseKind: KindUnsupportedFormat,
wantErrParseReason: "unsupported content type \"application/xml\"",
wantErrResponse: &ValidationError{Status: http.StatusUnsupportedMediaType,
Title: "unsupported content type \"application/xml\""},
},
{
name: "error - unsupported content-type on POST",
args: validationArgs{
r: unsupportedContentType,
},
wantErrReason: "header 'Content-Type' has unexpected value: \"text/plain\"",
wantErrResponse: &ValidationError{Status: http.StatusUnsupportedMediaType,
Title: "unsupported content type \"text/plain\""},
},
{
name: "success - no content-type header required on GET",
args: validationArgs{
r: noContentTypeNeeded,
},
},
//
// Query strings
//
{
name: "error - missing required query string parameter",
args: validationArgs{
r: newPetstoreRequest(t, http.MethodGet, "/pet/findByStatus", nil),
},
wantErrParam: "status",
wantErrParamIn: "query",
wantErrReason: "must have a value",
wantErrResponse: &ValidationError{Status: http.StatusBadRequest,
Title: "Parameter 'status' in query is required"},
},
{
name: "error - wrong query string parameter type",
args: validationArgs{
r: newPetstoreRequest(t, http.MethodGet, "/pet/findByIds?ids=1,notAnInt", nil),
},
wantErrParam: "ids",
wantErrParamIn: "query",
// This is a nested ParseError. The outer error is a KindOther with no details.
// So we'd need to look at the inner one which is a KindInvalidFormat. So just check the error body.
wantErrBody: "Parameter 'ids' in query has an error: path 1: value notAnInt: an invalid integer: " +
"strconv.ParseFloat: parsing \"notAnInt\": invalid syntax",
// TODO: Should we treat query params of the wrong type like a 404 instead of a 400?
wantErrResponse: &ValidationError{Status: http.StatusBadRequest,
Title: "Parameter 'ids' in query is invalid: notAnInt is an invalid integer"},
},
{
name: "success - ignores unknown query string parameter",
args: validationArgs{
r: newPetstoreRequest(t, http.MethodGet, "/pet/findByStatus?wat=isdis", nil),
},
},
{
name: "success - normal case, query strings",
args: validationArgs{
r: newPetstoreRequest(t, http.MethodGet, "/pet/findByStatus?status=available", nil),
},
},
{
name: "success - normal case, query strings, array",
args: validationArgs{
r: newPetstoreRequest(t, http.MethodGet, "/pet/findByStatus?status=available&status=sold", nil),
},
},
{
name: "error - invalid query string array serialization",
args: validationArgs{
r: newPetstoreRequest(t, http.MethodGet, "/pet/findByStatus?status=available,sold", nil),
},
wantErrParam: "status",
wantErrParamIn: "query",
wantErrSchemaReason: "JSON value is not one of the allowed values",
wantErrSchemaPath: "/0",
wantErrSchemaValue: "available,sold",
wantErrResponse: &ValidationError{Status: http.StatusBadRequest,
Title: "JSON value is not one of the allowed values",
Detail: "Value 'available,sold' at /0 must be one of: available, pending, sold; " +
// TODO: do we really want to use this heuristic to guess
// that they're using the wrong serialization?
"perhaps you intended '?status=available&status=sold'",
Source: &ValidationErrorSource{Parameter: "status"}},
},
{
name: "error - invalid enum value for query string parameter",
args: validationArgs{
r: newPetstoreRequest(t, http.MethodGet, "/pet/findByStatus?status=sold&status=watdis", nil),
},
wantErrParam: "status",
wantErrParamIn: "query",
wantErrSchemaReason: "JSON value is not one of the allowed values",
wantErrSchemaPath: "/1",
wantErrSchemaValue: "watdis",
wantErrResponse: &ValidationError{Status: http.StatusBadRequest,
Title: "JSON value is not one of the allowed values",
Detail: "Value 'watdis' at /1 must be one of: available, pending, sold",
Source: &ValidationErrorSource{Parameter: "status"}},
},
{
name: "error - invalid enum value, allowing commas (without 'perhaps you intended' recommendation)",
args: validationArgs{
// fish,with,commas isn't an enum value
r: newPetstoreRequest(t, http.MethodGet, "/pet/findByKind?kind=dog|fish,with,commas", nil),
},
wantErrParam: "kind",
wantErrParamIn: "query",
wantErrSchemaReason: "JSON value is not one of the allowed values",
wantErrSchemaPath: "/1",
wantErrSchemaValue: "fish,with,commas",
wantErrResponse: &ValidationError{Status: http.StatusBadRequest,
Title: "JSON value is not one of the allowed values",
Detail: "Value 'fish,with,commas' at /1 must be one of: dog, cat, turtle, bird,with,commas",
// No 'perhaps you intended' because its the right serialization format
Source: &ValidationErrorSource{Parameter: "kind"}},
},
{
name: "success - valid enum value, allowing commas",
args: validationArgs{
r: newPetstoreRequest(t, http.MethodGet, "/pet/findByKind?kind=dog|bird,with,commas", nil),
},
},
//
// Request bodies
//
{
name: "error - missing required object attribute",
args: validationArgs{
r: newPetstoreRequest(t, http.MethodPost, "/pet", bytes.NewBufferString(`{"name":"Bahama"}`)),
},
wantErrReason: "doesn't match the schema",
wantErrSchemaReason: "Property 'photoUrls' is missing",
wantErrSchemaValue: map[string]string{"name": "Bahama"},
wantErrSchemaPath: "/",
wantErrResponse: &ValidationError{Status: http.StatusUnprocessableEntity,
Title: "Property 'photoUrls' is missing",
Source: &ValidationErrorSource{Pointer: "/photoUrls"}},
},
{
name: "error - missing required nested object attribute",
args: validationArgs{
r: newPetstoreRequest(t, http.MethodPost, "/pet",
bytes.NewBufferString(`{"name":"Bahama","photoUrls":[],"category":{}}`)),
},
wantErrReason: "doesn't match the schema",
wantErrSchemaReason: "Property 'name' is missing",
wantErrSchemaValue: map[string]string{},
wantErrSchemaPath: "/category",
wantErrResponse: &ValidationError{Status: http.StatusUnprocessableEntity,
Title: "Property 'name' is missing",
Source: &ValidationErrorSource{Pointer: "/category/name"}},
},
{
name: "error - missing required deeply nested object attribute",
args: validationArgs{
r: newPetstoreRequest(t, http.MethodPost, "/pet",
bytes.NewBufferString(`{"name":"Bahama","photoUrls":[],"category":{"tags": [{}]}}`)),
},
wantErrReason: "doesn't match the schema",
wantErrSchemaReason: "Property 'name' is missing",
wantErrSchemaValue: map[string]string{},
wantErrSchemaPath: "/category/tags/0",
wantErrResponse: &ValidationError{Status: http.StatusUnprocessableEntity,
Title: "Property 'name' is missing",
Source: &ValidationErrorSource{Pointer: "/category/tags/0/name"}},
},
{
// TODO: Add support for validating readonly properties to upstream validator.
name: "error - readonly object attribute",
args: validationArgs{
r: newPetstoreRequest(t, http.MethodPost, "/pet",
bytes.NewBufferString(`{"id":213,"name":"Bahama","photoUrls":[]}}`)),
},
//wantErr: true,
},
{
name: "error - wrong attribute type",
args: validationArgs{
r: newPetstoreRequest(t, http.MethodPost, "/pet",
bytes.NewBufferString(`{"name":"Bahama","photoUrls":"http://cat"}`)),
},
wantErrReason: "doesn't match the schema",
wantErrSchemaReason: "Field must be set to array or not be present",
wantErrSchemaPath: "/photoUrls",
wantErrSchemaValue: "string",
// TODO: this shouldn't say "or not be present", but this requires recursively resolving
// innerErr.JSONPointer() against e.RequestBody.Content["application/json"].Schema.Value (.Required, .Properties)
wantErrResponse: &ValidationError{Status: http.StatusUnprocessableEntity,
Title: "Field must be set to array or not be present",
Source: &ValidationErrorSource{Pointer: "/photoUrls"}},
},
{
name: "success - ignores unknown object attribute",
args: validationArgs{
r: newPetstoreRequest(t, http.MethodPost, "/pet",
bytes.NewBufferString(`{"wat":"isdis","name":"Bahama","photoUrls":[]}`)),
},
},
{
name: "success - normal case, POST",
args: validationArgs{
r: newPetstoreRequest(t, http.MethodPost, "/pet",
bytes.NewBufferString(`{"name":"Bahama","photoUrls":[]}`)),
},
},
//
// Path params
//
{
name: "error - missing path param",
args: validationArgs{
r: newPetstoreRequest(t, http.MethodGet, "/pet/", nil),
},
wantErrParam: "petId",
wantErrParamIn: "path",
wantErrReason: "must have a value",
wantErrResponse: &ValidationError{Status: http.StatusBadRequest,
Title: "Parameter 'petId' in path is required"},
},
{
name: "error - wrong path param type",
args: validationArgs{
r: newPetstoreRequest(t, http.MethodGet, "/pet/NotAnInt", nil),
},
wantErrParam: "petId",
wantErrParamIn: "path",
wantErrParseKind: KindInvalidFormat,
wantErrParseValue: "NotAnInt",
wantErrParseReason: "an invalid integer",
wantErrResponse: &ValidationError{Status: http.StatusNotFound,
Title: "Resource not found with 'petId' value: NotAnInt"},
},
{
name: "success - normal case, with path params",
args: validationArgs{
r: newPetstoreRequest(t, http.MethodGet, "/pet/23", nil),
},
},
}
}
func TestValidationHandler_validateRequest(t *testing.T) {
tests := getValidationTests(t)
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
req := require.New(t)
h, err := buildValidationHandler(tt)
req.NoError(err)
err = h.validateRequest(tt.args.r)
req.Equal(tt.wantErr, err != nil)
if err != nil {
if tt.wantErrBody != "" {
req.Equal(tt.wantErrBody, err.Error())
}
if e, ok := err.(*RouteError); ok {
req.Equal(tt.wantErrReason, e.Reason)
return
}
e, ok := err.(*RequestError)
req.True(ok, "error = %v, not a RequestError -- %#v", err, err)
req.Equal(tt.wantErrReason, e.Reason)
if e.Parameter != nil {
req.Equal(tt.wantErrParam, e.Parameter.Name)
req.Equal(tt.wantErrParamIn, e.Parameter.In)
} else {
req.False(tt.wantErrParam != "" || tt.wantErrParamIn != "",
"error = %v, no Parameter -- %#v", e, e)
}
if innerErr, ok := e.Err.(*openapi3.SchemaError); ok {
req.Equal(tt.wantErrSchemaReason, innerErr.Reason)
pointer := toJSONPointer(innerErr.JSONPointer())
req.Equal(tt.wantErrSchemaPath, pointer)
req.Equal(fmt.Sprintf("%v", tt.wantErrSchemaValue), fmt.Sprintf("%v", innerErr.Value))
} else {
req.False(tt.wantErrSchemaReason != "" || tt.wantErrSchemaPath != "",
"error = %v, not a SchemaError -- %#v", e.Err, e.Err)
}
if innerErr, ok := e.Err.(*ParseError); ok {
req.Equal(tt.wantErrParseKind, innerErr.Kind)
req.Equal(tt.wantErrParseValue, innerErr.Value)
req.Equal(tt.wantErrParseReason, innerErr.Reason)
} else {
req.False(tt.wantErrParseValue != nil || tt.wantErrParseReason != "",
"error = %v, not a ParseError -- %#v", e.Err, e.Err)
}
}
})
}
}
func TestValidationErrorEncoder(t *testing.T) {
tests := getValidationTests(t)
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
mockEncoder := &mockErrorEncoder{}
encoder := &ValidationErrorEncoder{Encoder: mockEncoder.Encode}
req := require.New(t)
h, err := buildValidationHandler(tt)
req.NoError(err)
err = h.validateRequest(tt.args.r)
req.Equal(tt.wantErr, err != nil)
if err != nil {
encoder.Encode(tt.args.r.Context(), err, httptest.NewRecorder())
if tt.wantErrResponse != mockEncoder.Err {
req.Equal(tt.wantErrResponse, mockEncoder.Err)
}
}
})
}
}
func buildValidationHandler(tt *validationTest) (*ValidationHandler, error) {
if tt.fields.SwaggerFile == "" {
tt.fields.SwaggerFile = "fixtures/petstore.json"
}
h := &ValidationHandler{
Handler: tt.fields.Handler,
SwaggerFile: tt.fields.SwaggerFile,
ErrorEncoder: tt.fields.ErrorEncoder,
}
tt.wantErr = tt.wantErr ||
(tt.wantErrBody != "") ||
(tt.wantErrReason != "") ||
(tt.wantErrSchemaReason != "") ||
(tt.wantErrSchemaPath != "") ||
(tt.wantErrParseValue != nil) ||
(tt.wantErrParseReason != "")
err := h.Load()
return h, err
}
type testHandler struct {
Called bool
}
func (h *testHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
h.Called = true
}
type mockErrorEncoder struct {
Called bool
Ctx context.Context
Err error
W http.ResponseWriter
}
func (e *mockErrorEncoder) Encode(ctx context.Context, err error, w http.ResponseWriter) {
e.Called = true
e.Ctx = ctx
e.Err = err
e.W = w
}
func runTest_ServeHTTP(t *testing.T, handler http.Handler, encoder ErrorEncoder, req *http.Request) *http.Response {
h := &ValidationHandler{
Handler: handler,
ErrorEncoder: encoder,
SwaggerFile: "fixtures/petstore.json",
}
err := h.Load()
require.NoError(t, err)
w := httptest.NewRecorder()
h.ServeHTTP(w, req)
return w.Result()
}
func runTest_Middleware(t *testing.T, handler http.Handler, encoder ErrorEncoder, req *http.Request) *http.Response {
h := &ValidationHandler{
ErrorEncoder: encoder,
SwaggerFile: "fixtures/petstore.json",
}
err := h.Load()
require.NoError(t, err)
w := httptest.NewRecorder()
h.Middleware(handler).ServeHTTP(w, req)
return w.Result()
}
func TestValidationHandler_ServeHTTP(t *testing.T) {
t.Run("errors on invalid requests", func(t *testing.T) {
httpCtx := context.WithValue(context.Background(), "pig", "tails")
r, err := http.NewRequest(http.MethodGet, "http://unknown-host.com/v2/pet", nil)
require.NoError(t, err)
r = r.WithContext(httpCtx)
handler := &testHandler{}
encoder := &mockErrorEncoder{}
runTest_ServeHTTP(t, handler, encoder.Encode, r)
require.False(t, handler.Called)
require.True(t, encoder.Called)
require.Equal(t, httpCtx, encoder.Ctx)
require.NotNil(t, encoder.Err)
})
t.Run("passes valid requests through", func(t *testing.T) {
r := newPetstoreRequest(t, http.MethodGet, "/pet/findByStatus?status=sold", nil)
handler := &testHandler{}
encoder := &mockErrorEncoder{}
runTest_ServeHTTP(t, handler, encoder.Encode, r)
require.True(t, handler.Called)
require.False(t, encoder.Called)
})
t.Run("uses error encoder", func(t *testing.T) {
r := newPetstoreRequest(t, http.MethodPost, "/pet", bytes.NewBufferString(`{"name":"Bahama","photoUrls":"http://cat"}`))
handler := &testHandler{}
encoder := &ValidationErrorEncoder{Encoder: (ErrorEncoder)(DefaultErrorEncoder)}
resp := runTest_ServeHTTP(t, handler, encoder.Encode, r)
body, err := ioutil.ReadAll(resp.Body)
require.NoError(t, err)
require.Equal(t, http.StatusUnprocessableEntity, resp.StatusCode)
require.Equal(t, "[422][][] Field must be set to array or not be present [source pointer=/photoUrls]", string(body))
})
}
func TestValidationHandler_Middleware(t *testing.T) {
t.Run("errors on invalid requests", func(t *testing.T) {
httpCtx := context.WithValue(context.Background(), "pig", "tails")
r, err := http.NewRequest(http.MethodGet, "http://unknown-host.com/v2/pet", nil)
require.NoError(t, err)
r = r.WithContext(httpCtx)
handler := &testHandler{}
encoder := &mockErrorEncoder{}
runTest_Middleware(t, handler, encoder.Encode, r)
require.False(t, handler.Called)
require.True(t, encoder.Called)
require.Equal(t, httpCtx, encoder.Ctx)
require.NotNil(t, encoder.Err)
})
t.Run("passes valid requests through", func(t *testing.T) {
r := newPetstoreRequest(t, http.MethodGet, "/pet/findByStatus?status=sold", nil)
handler := &testHandler{}
encoder := &mockErrorEncoder{}
runTest_Middleware(t, handler, encoder.Encode, r)
require.True(t, handler.Called)
require.False(t, encoder.Called)
})
t.Run("uses error encoder", func(t *testing.T) {
r := newPetstoreRequest(t, http.MethodPost, "/pet", bytes.NewBufferString(`{"name":"Bahama","photoUrls":"http://cat"}`))
handler := &testHandler{}
encoder := &ValidationErrorEncoder{Encoder: (ErrorEncoder)(DefaultErrorEncoder)}
resp := runTest_Middleware(t, handler, encoder.Encode, r)
body, err := ioutil.ReadAll(resp.Body)
require.NoError(t, err)
require.Equal(t, http.StatusUnprocessableEntity, resp.StatusCode)
require.Equal(t, "[422][][] Field must be set to array or not be present [source pointer=/photoUrls]", string(body))
})
}