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http_test.go
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package gateway
import (
"context"
"encoding/json"
"errors"
"io/ioutil"
"net/http"
"net/http/httptest"
"net/url"
"strings"
"testing"
"golang.org/x/net/html"
"github.com/nautilus/graphql"
"github.com/stretchr/testify/assert"
"github.com/vektah/gqlparser/v2/ast"
)
type resultWithErrors struct {
Errors []struct {
Extensions map[string]string `json:"extensions"`
Message string `json:"message"`
} `json:"errors"`
}
func TestGraphQLHandler_postMissingQuery(t *testing.T) {
schema, err := graphql.LoadSchema(`
type Query {
allUsers: [String!]!
}
`)
// create gateway schema we can test against
gateway, err := New([]*graphql.RemoteSchema{
{Schema: schema, URL: "url1"},
})
if err != nil {
t.Error(err.Error())
return
}
// the incoming request
request := httptest.NewRequest("POST", "/graphql", strings.NewReader(`
{
"query": ""
}
`))
// a recorder so we can check what the handler responded with
responseRecorder := httptest.NewRecorder()
// call the http hander
gateway.GraphQLHandler(responseRecorder, request)
// make sure we got an error code
assert.Equal(t, http.StatusUnprocessableEntity, responseRecorder.Result().StatusCode)
}
func TestGraphQLHandler(t *testing.T) {
schema, _ := graphql.LoadSchema(`
type Query {
allUsers: [String!]!
}
`)
// create gateway schema we can test against
gateway, err := New([]*graphql.RemoteSchema{
{Schema: schema, URL: "url1"},
}, WithExecutor(ExecutorFunc(
func(*ExecutionContext) (map[string]interface{}, error) {
return map[string]interface{}{
"Hello": "world",
}, nil
},
)))
if err != nil {
t.Error(err.Error())
return
}
t.Run("Missing query", func(t *testing.T) {
// the incoming request
request := httptest.NewRequest("GET", "/graphql", strings.NewReader(""))
// a recorder so we can check what the handler responded with
responseRecorder := httptest.NewRecorder()
// call the http hander
gateway.GraphQLHandler(responseRecorder, request)
// make sure we got an error code
assert.Equal(t, http.StatusUnprocessableEntity, responseRecorder.Result().StatusCode)
// verify the graphql error code
result, err := readResultWithErrors(responseRecorder, t)
if err != nil {
assert.Error(t, err)
}
assert.Equal(t, result.Errors[0].Extensions["code"], "BAD_USER_INPUT")
})
t.Run("Non-object variables fails", func(t *testing.T) {
// the incoming request
request := httptest.NewRequest("GET", `/graphql?query={allUsers}&variables=true`, strings.NewReader(""))
// a recorder so we can check what the handler responded with
responseRecorder := httptest.NewRecorder()
// call the http hander
gateway.GraphQLHandler(responseRecorder, request)
// make sure we got an error code
assert.Equal(t, http.StatusUnprocessableEntity, responseRecorder.Result().StatusCode)
})
t.Run("Object variables succeeds", func(t *testing.T) {
// the incoming request
request := httptest.NewRequest("GET", `/graphql?query={allUsers}&variables={"foo":2}`, strings.NewReader(""))
// a recorder so we can check what the handler responded with
responseRecorder := httptest.NewRecorder()
// call the http hander
gateway.GraphQLHandler(responseRecorder, request)
// make sure we got an error code
assert.Equal(t, http.StatusOK, responseRecorder.Result().StatusCode)
})
t.Run("OperationName", func(t *testing.T) {
// the incoming request
request := httptest.NewRequest("GET", `/graphql?query={allusers}&operationName=Hello`, strings.NewReader(""))
// a recorder so we can check what the handler responded with
responseRecorder := httptest.NewRecorder()
// call the http hander
gateway.GraphQLHandler(responseRecorder, request)
// make sure we got an error code
assert.Equal(t, http.StatusBadRequest, responseRecorder.Result().StatusCode)
})
t.Run("error marhsalling response", func(t *testing.T) {
// create gateway schema we can test against
innerGateway, err := New([]*graphql.RemoteSchema{
{Schema: schema, URL: "url1"},
}, WithExecutor(ExecutorFunc(
func(*ExecutionContext) (map[string]interface{}, error) {
return map[string]interface{}{
"foo": func() {},
}, nil
},
)))
if err != nil {
t.Error(err.Error())
return
}
// the incoming request
request := httptest.NewRequest("GET", `/graphql?query={allUsers}`, strings.NewReader(""))
// a recorder so we can check what the handler responded with
responseRecorder := httptest.NewRecorder()
// call the http hander
innerGateway.GraphQLHandler(responseRecorder, request)
// make sure we got an error code
assert.Equal(t, http.StatusInternalServerError, responseRecorder.Result().StatusCode)
// verify the graphql error code
result, err := readResultWithErrors(responseRecorder, t)
if err != nil {
assert.Error(t, err)
}
assert.Equal(t, result.Errors[0].Extensions["code"], "UNKNOWN_ERROR")
})
}
func readResultWithErrors(responseRecorder *httptest.ResponseRecorder, t *testing.T) (*resultWithErrors, error) {
body, err := ioutil.ReadAll(responseRecorder.Result().Body)
if err != nil {
return nil, err
}
//result := map[string]interface{}{}
result := resultWithErrors{}
err = json.Unmarshal(body, &result)
return &result, nil
}
func TestQueryPlanCacheParameters_post(t *testing.T) {
// load the schema we'll test
schema, _ := graphql.LoadSchema(`
type Query {
allUsers: [String!]!
}
`)
// the expected result
expectedResult := map[string]interface{}{
"Hello": "world",
}
// create gateway schema we can test against
gateway, err := New([]*graphql.RemoteSchema{
{Schema: schema, URL: "url1"},
}, WithExecutor(ExecutorFunc(
func(*ExecutionContext) (map[string]interface{}, error) {
return expectedResult, nil
},
)), WithAutomaticQueryPlanCache())
if err != nil {
t.Error(err)
return
}
// make a request for an unknown persisted query
request := httptest.NewRequest("POST", "/graphql", strings.NewReader(`
{
"extensions": {
"persistedQuery": {
"version": 1,
"sha256Hash": "1234"
}
}
}
`))
// a recorder so we can check what the handler responded with
responseRecorder := httptest.NewRecorder()
// call the http hander
gateway.PlaygroundHandler(responseRecorder, request)
// get the response from the handler
response := responseRecorder.Result()
// make sure we got a bad status
if !assert.Equal(t, http.StatusBadRequest, response.StatusCode) {
return
}
// the body of the response
body := struct {
Errors []struct {
Message string `json:"message"`
} `json:"errors"`
}{}
// parse the response
defer response.Body.Close()
if err := json.NewDecoder(response.Body).Decode(&body); err != nil {
t.Error(err)
return
}
// make sure that the response is what we expect
if !assert.Equal(t, "PersistedQueryNotFound", body.Errors[0].Message) {
return
}
// passing in a valid query along with the hash
request = httptest.NewRequest("POST", "/graphql", strings.NewReader(`
{
"query": "{ allUsers }",
"extensions": {
"persistedQuery": {
"version": 1,
"sha256Hash": "1234"
}
}
}
`))
// a recorder so we can check what the handler responded with
responseRecorder2 := httptest.NewRecorder()
// call the http hander
gateway.PlaygroundHandler(responseRecorder2, request)
// get the response from the handler
response2 := responseRecorder2.Result()
// make sure we got an OK status
if !assert.Equal(t, http.StatusOK, response2.StatusCode) {
return
}
// and the expected result
result := map[string]interface{}{}
defer response2.Body.Close()
if err := json.NewDecoder(response2.Body).Decode(&result); err != nil {
t.Error(err)
return
}
// the expected result
expected := map[string]interface{}{
"data": expectedResult,
"extensions": map[string]interface{}{
"persistedQuery": map[string]interface{}{
"sha265Hash": "1234",
"version": "1",
},
},
}
assert.Equal(t, expected, result)
}
func TestQueryPlanCacheParameters_get(t *testing.T) {
// load the schema we'll test
schema, _ := graphql.LoadSchema(`
type Query {
allUsers: [String!]!
}
`)
// the expected result
expectedResult := map[string]interface{}{
"Hello": "world",
}
// create gateway schema we can test against
gateway, err := New([]*graphql.RemoteSchema{
{Schema: schema, URL: "url1"},
}, WithExecutor(ExecutorFunc(
func(*ExecutionContext) (map[string]interface{}, error) {
return expectedResult, nil
},
)), WithAutomaticQueryPlanCache())
if err != nil {
t.Error(err)
return
}
// make a request for an unknown persisted query
// request := httptesot.NewRequest("POST", "/graphql?extensions={\"persistedQuery\": {\"version\": 1, \"sha256Hash\": \"1234\"}}", strings.NewReader(""))
request := &http.Request{
Method: "GET",
URL: &url.URL{
RawPath: "/graphql",
RawQuery: "extensions={\"persistedQuery\": {\"version\": 1, \"sha256Hash\": \"1234\"}}",
},
}
// a recorder so we can check what the handler responded with
responseRecorder := httptest.NewRecorder()
// call the http hander
gateway.GraphQLHandler(responseRecorder, request)
// get the response from the handler
response := responseRecorder.Result()
// make sure we got a bad status
if !assert.Equal(t, http.StatusBadRequest, response.StatusCode) {
return
}
// the body of the response
body := struct {
Errors []struct {
Message string `json:"message"`
} `json:"errors"`
}{}
// parse the response
defer response.Body.Close()
if err := json.NewDecoder(response.Body).Decode(&body); err != nil {
t.Error(err)
return
}
// make sure that the response is what we expect
if !assert.Equal(t, "PersistedQueryNotFound", body.Errors[0].Message) {
return
}
}
func TestPlaygroundHandler_postRequest(t *testing.T) {
// a planner that always returns an error
planner := &MockErrPlanner{Err: errors.New("Planning error")}
// and some schemas that the gateway wraps
schema, err := graphql.LoadSchema(`
type Query {
allUsers: [String!]!
}
`)
schemas := []*graphql.RemoteSchema{{Schema: schema, URL: "url1"}}
// create gateway schema we can test against
gateway, err := New(schemas, WithPlanner(planner))
if err != nil {
t.Error(err.Error())
return
}
// the incoming request
request := httptest.NewRequest("POST", "/graphql", strings.NewReader(`
{
"query": "{ allUsers }"
}
`))
// a recorder so we can check what the handler responded with
responseRecorder := httptest.NewRecorder()
// call the http hander
gateway.PlaygroundHandler(responseRecorder, request)
// get the response from the handler
response := responseRecorder.Result()
// read the body
_, err = ioutil.ReadAll(response.Body)
if err != nil {
t.Error(err.Error())
return
}
// make sure we got an error code
assert.Equal(t, http.StatusBadRequest, response.StatusCode)
}
func TestPlaygroundHandler_postRequestList(t *testing.T) {
// and some schemas that the gateway wraps
schema, err := graphql.LoadSchema(`
type User {
id: ID!
}
`)
if err != nil {
t.Error(err.Error())
return
}
// some fields to query
aField := &QueryField{
Name: "a",
Type: ast.NamedType("User", &ast.Position{}),
Resolver: func(ctx context.Context, arguments map[string]interface{}) (string, error) {
return "a", nil
},
}
bField := &QueryField{
Name: "b",
Type: ast.NamedType("User", &ast.Position{}),
Resolver: func(ctx context.Context, arguments map[string]interface{}) (string, error) {
return "b", nil
},
}
// instantiate the gateway
gw, err := New([]*graphql.RemoteSchema{{URL: "url1", Schema: schema}}, WithQueryFields(aField, bField))
if err != nil {
t.Error(err.Error())
return
}
// we need to send a list of two queries ({ a } and { b }) and make sure they resolve in the right order
// the incoming request
request := httptest.NewRequest("POST", "/graphql", strings.NewReader(`
[
{
"query": "{ a { id } }"
},
{
"query": "{ b { id } }"
}
]
`))
// a recorder so we can check what the handler responded with
responseRecorder := httptest.NewRecorder()
// call the http hander
gw.PlaygroundHandler(responseRecorder, request)
// get the response from the handler
response := responseRecorder.Result()
// make sure we got a successful response
if !assert.Equal(t, http.StatusOK, response.StatusCode) {
return
}
// read the body
body, err := ioutil.ReadAll(response.Body)
if err != nil {
t.Error(err.Error())
return
}
result := []map[string]interface{}{}
err = json.Unmarshal(body, &result)
if err != nil {
t.Error(err.Error())
return
}
// we should have gotten 2 responses
if !assert.Len(t, result, 2) {
return
}
// make sure there were no errors in the first query
if firstQuery := result[0]; assert.Nil(t, firstQuery["errors"]) {
// make sure it has the right id
assert.Equal(t, map[string]interface{}{"a": map[string]interface{}{"id": "a"}}, firstQuery["data"])
}
// make sure there were no errors in the second query
if secondQuery := result[1]; assert.Nil(t, secondQuery["errors"]) {
// make sure it has the right id
assert.Equal(t, map[string]interface{}{"b": map[string]interface{}{"id": "b"}}, secondQuery["data"])
}
}
func TestPlaygroundHandler_getRequest(t *testing.T) {
// a planner that always returns an error
planner := &MockErrPlanner{Err: errors.New("Planning error")}
// and some schemas that the gateway wraps
schema, err := graphql.LoadSchema(`
type Query {
allUsers: [String!]!
}
`)
schemas := []*graphql.RemoteSchema{{Schema: schema, URL: "url1"}}
// create gateway schema we can test against
gateway, err := New(schemas, WithPlanner(planner))
if err != nil {
t.Error(err.Error())
return
}
// the incoming request
request := httptest.NewRequest("GET", "/graphql", strings.NewReader(``))
// a recorder so we can check what the handler responded with
responseRecorder := httptest.NewRecorder()
// call the http hander
gateway.PlaygroundHandler(responseRecorder, request)
_, err = html.Parse(responseRecorder.Result().Body)
defer responseRecorder.Result().Body.Close()
if err != nil {
t.Error(err.Error())
return
}
}