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json_test.go
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json_test.go
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// Copyright 2012-2018 The NATS Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package test
import (
"reflect"
"testing"
"time"
"github.com/nats-io/go-nats"
"github.com/nats-io/go-nats/encoders/builtin"
)
func NewJsonEncodedConn(tl TestLogger) *nats.EncodedConn {
ec, err := nats.NewEncodedConn(NewConnection(tl, TEST_PORT), nats.JSON_ENCODER)
if err != nil {
tl.Fatalf("Failed to create an encoded connection: %v\n", err)
}
return ec
}
func TestEncBuiltinJsonMarshalString(t *testing.T) {
s := RunServerOnPort(TEST_PORT)
defer s.Shutdown()
ec := NewJsonEncodedConn(t)
defer ec.Close()
ch := make(chan bool)
testString := "Hello World!"
ec.Subscribe("json_string", func(s string) {
if s != testString {
t.Fatalf("Received test string of '%s', wanted '%s'\n", s, testString)
}
ch <- true
})
ec.Publish("json_string", testString)
if e := Wait(ch); e != nil {
t.Fatal("Did not receive the message")
}
}
func TestEncBuiltinJsonMarshalEmptyString(t *testing.T) {
s := RunServerOnPort(TEST_PORT)
defer s.Shutdown()
ec := NewJsonEncodedConn(t)
defer ec.Close()
ch := make(chan bool)
ec.Subscribe("json_empty_string", func(s string) {
if s != "" {
t.Fatalf("Received test of '%v', wanted empty string\n", s)
}
ch <- true
})
ec.Publish("json_empty_string", "")
if e := Wait(ch); e != nil {
t.Fatal("Did not receive the message")
}
}
func TestEncBuiltinJsonMarshalInt(t *testing.T) {
s := RunServerOnPort(TEST_PORT)
defer s.Shutdown()
ec := NewJsonEncodedConn(t)
defer ec.Close()
ch := make(chan bool)
testN := 22
ec.Subscribe("json_int", func(n int) {
if n != testN {
t.Fatalf("Received test int of '%d', wanted '%d'\n", n, testN)
}
ch <- true
})
ec.Publish("json_int", testN)
if e := Wait(ch); e != nil {
t.Fatal("Did not receive the message")
}
}
func TestEncBuiltinJsonMarshalBool(t *testing.T) {
s := RunServerOnPort(TEST_PORT)
defer s.Shutdown()
ec := NewJsonEncodedConn(t)
defer ec.Close()
ch := make(chan bool)
ec.Subscribe("json_bool", func(b bool) {
if !b {
t.Fatalf("Received test of '%v', wanted 'true'\n", b)
}
ch <- true
})
ec.Publish("json_bool", true)
if e := Wait(ch); e != nil {
t.Fatal("Did not receive the message")
}
}
func TestEncBuiltinJsonMarshalNull(t *testing.T) {
s := RunServerOnPort(TEST_PORT)
defer s.Shutdown()
ec := NewJsonEncodedConn(t)
defer ec.Close()
type TestType struct{}
ch := make(chan bool)
var testValue *TestType
ec.Subscribe("json_null", func(i interface{}) {
if i != nil {
t.Fatalf("Received test of '%v', wanted 'nil'\n", i)
}
ch <- true
})
ec.Publish("json_null", testValue)
if e := Wait(ch); e != nil {
t.Fatal("Did not receive the message")
}
}
func TestEncBuiltinJsonMarshalArray(t *testing.T) {
s := RunServerOnPort(TEST_PORT)
defer s.Shutdown()
ec := NewJsonEncodedConn(t)
defer ec.Close()
ch := make(chan bool)
var a = []string{"a", "b", "c"}
ec.Subscribe("json_array", func(v []string) {
if !reflect.DeepEqual(v, a) {
t.Fatalf("Received test of '%v', wanted '%v'\n", v, a)
}
ch <- true
})
ec.Publish("json_array", a)
if e := Wait(ch); e != nil {
t.Fatal("Did not receive the message")
}
}
func TestEncBuiltinJsonMarshalEmptyArray(t *testing.T) {
s := RunServerOnPort(TEST_PORT)
defer s.Shutdown()
ec := NewJsonEncodedConn(t)
defer ec.Close()
ch := make(chan bool)
var a []string
ec.Subscribe("json_empty_array", func(v []string) {
if !reflect.DeepEqual(v, a) {
t.Fatalf("Received test of '%v', wanted '%v'\n", v, a)
}
ch <- true
})
ec.Publish("json_empty_array", a)
if e := Wait(ch); e != nil {
t.Fatal("Did not receive the message")
}
}
type person struct {
Name string
Address string
Age int
Children map[string]*person
Assets map[string]uint
}
func TestEncBuiltinJsonMarshalStruct(t *testing.T) {
s := RunServerOnPort(TEST_PORT)
defer s.Shutdown()
ec := NewJsonEncodedConn(t)
defer ec.Close()
ch := make(chan bool)
me := &person{Name: "derek", Age: 22, Address: "140 New Montgomery St"}
me.Children = make(map[string]*person)
me.Children["sam"] = &person{Name: "sam", Age: 19, Address: "140 New Montgomery St"}
me.Children["meg"] = &person{Name: "meg", Age: 17, Address: "140 New Montgomery St"}
me.Assets = make(map[string]uint)
me.Assets["house"] = 1000
me.Assets["car"] = 100
ec.Subscribe("json_struct", func(p *person) {
if !reflect.DeepEqual(p, me) {
t.Fatal("Did not receive the correct struct response")
}
ch <- true
})
ec.Publish("json_struct", me)
if e := Wait(ch); e != nil {
t.Fatal("Did not receive the message")
}
}
func BenchmarkJsonMarshalStruct(b *testing.B) {
me := &person{Name: "derek", Age: 22, Address: "140 New Montgomery St"}
me.Children = make(map[string]*person)
me.Children["sam"] = &person{Name: "sam", Age: 19, Address: "140 New Montgomery St"}
me.Children["meg"] = &person{Name: "meg", Age: 17, Address: "140 New Montgomery St"}
encoder := &builtin.JsonEncoder{}
for n := 0; n < b.N; n++ {
if _, err := encoder.Encode("protobuf_test", me); err != nil {
b.Fatal("Couldn't serialize object", err)
}
}
}
func BenchmarkPublishJsonStruct(b *testing.B) {
// stop benchmark for set-up
b.StopTimer()
s := RunServerOnPort(TEST_PORT)
defer s.Shutdown()
ec := NewJsonEncodedConn(b)
defer ec.Close()
ch := make(chan bool)
me := &person{Name: "derek", Age: 22, Address: "140 New Montgomery St"}
me.Children = make(map[string]*person)
me.Children["sam"] = &person{Name: "sam", Age: 19, Address: "140 New Montgomery St"}
me.Children["meg"] = &person{Name: "meg", Age: 17, Address: "140 New Montgomery St"}
ec.Subscribe("json_struct", func(p *person) {
if !reflect.DeepEqual(p, me) {
b.Fatalf("Did not receive the correct struct response")
}
ch <- true
})
// resume benchmark
b.StartTimer()
for n := 0; n < b.N; n++ {
ec.Publish("json_struct", me)
if e := Wait(ch); e != nil {
b.Fatal("Did not receive the message")
}
}
}
func TestEncBuiltinNotMarshableToJson(t *testing.T) {
je := &builtin.JsonEncoder{}
ch := make(chan bool)
_, err := je.Encode("foo", ch)
if err == nil {
t.Fatal("Expected an error when failing encoding")
}
}
func TestEncBuiltinFailedEncodedPublish(t *testing.T) {
s := RunServerOnPort(TEST_PORT)
defer s.Shutdown()
ec := NewJsonEncodedConn(t)
defer ec.Close()
ch := make(chan bool)
err := ec.Publish("foo", ch)
if err == nil {
t.Fatal("Expected an error trying to publish a channel")
}
err = ec.PublishRequest("foo", "bar", ch)
if err == nil {
t.Fatal("Expected an error trying to publish a channel")
}
var cr chan bool
err = ec.Request("foo", ch, &cr, 1*time.Second)
if err == nil {
t.Fatal("Expected an error trying to publish a channel")
}
err = ec.LastError()
if err != nil {
t.Fatalf("Expected LastError to be nil: %q ", err)
}
}
func TestEncBuiltinDecodeConditionals(t *testing.T) {
je := &builtin.JsonEncoder{}
b, err := je.Encode("foo", 22)
if err != nil {
t.Fatalf("Expected no error when encoding, got %v\n", err)
}
var foo string
var bar []byte
err = je.Decode("foo", b, &foo)
if err != nil {
t.Fatalf("Expected no error when decoding, got %v\n", err)
}
err = je.Decode("foo", b, &bar)
if err != nil {
t.Fatalf("Expected no error when decoding, got %v\n", err)
}
}