dex/vendor/google.golang.org/appengine/delay/delay_test.go

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2016-07-26 01:30:28 +05:30
// Copyright 2011 Google Inc. All rights reserved.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.
package delay
import (
"bytes"
"encoding/gob"
"errors"
"fmt"
"net/http"
"net/http/httptest"
"reflect"
"testing"
"github.com/golang/protobuf/proto"
"golang.org/x/net/context"
"google.golang.org/appengine/internal"
"google.golang.org/appengine/taskqueue"
)
type CustomType struct {
N int
}
type CustomInterface interface {
N() int
}
type CustomImpl int
func (c CustomImpl) N() int { return int(c) }
// CustomImpl needs to be registered with gob.
func init() {
gob.Register(CustomImpl(0))
}
var (
invalidFunc = Func("invalid", func() {})
regFuncRuns = 0
regFuncMsg = ""
regFunc = Func("reg", func(c context.Context, arg string) {
regFuncRuns++
regFuncMsg = arg
})
custFuncTally = 0
custFunc = Func("cust", func(c context.Context, ct *CustomType, ci CustomInterface) {
a, b := 2, 3
if ct != nil {
a = ct.N
}
if ci != nil {
b = ci.N()
}
custFuncTally += a + b
})
anotherCustFunc = Func("cust2", func(c context.Context, n int, ct *CustomType, ci CustomInterface) {
})
varFuncMsg = ""
varFunc = Func("variadic", func(c context.Context, format string, args ...int) {
// convert []int to []interface{} for fmt.Sprintf.
as := make([]interface{}, len(args))
for i, a := range args {
as[i] = a
}
varFuncMsg = fmt.Sprintf(format, as...)
})
errFuncRuns = 0
errFuncErr = errors.New("error!")
errFunc = Func("err", func(c context.Context) error {
errFuncRuns++
if errFuncRuns == 1 {
return nil
}
return errFuncErr
})
)
type fakeContext struct {
ctx context.Context
logging [][]interface{}
}
func newFakeContext() *fakeContext {
f := new(fakeContext)
f.ctx = internal.WithCallOverride(context.Background(), f.call)
f.ctx = internal.WithLogOverride(f.ctx, f.logf)
return f
}
func (f *fakeContext) call(ctx context.Context, service, method string, in, out proto.Message) error {
panic("should never be called")
}
var logLevels = map[int64]string{1: "INFO", 3: "ERROR"}
func (f *fakeContext) logf(level int64, format string, args ...interface{}) {
f.logging = append(f.logging, append([]interface{}{logLevels[level], format}, args...))
}
func TestInvalidFunction(t *testing.T) {
c := newFakeContext()
if got, want := invalidFunc.Call(c.ctx), fmt.Errorf("delay: func is invalid: %s", errFirstArg); got.Error() != want.Error() {
t.Errorf("Incorrect error: got %q, want %q", got, want)
}
}
func TestVariadicFunctionArguments(t *testing.T) {
// Check the argument type validation for variadic functions.
c := newFakeContext()
calls := 0
taskqueueAdder = func(c context.Context, t *taskqueue.Task, _ string) (*taskqueue.Task, error) {
calls++
return t, nil
}
varFunc.Call(c.ctx, "hi")
varFunc.Call(c.ctx, "%d", 12)
varFunc.Call(c.ctx, "%d %d %d", 3, 1, 4)
if calls != 3 {
t.Errorf("Got %d calls to taskqueueAdder, want 3", calls)
}
if got, want := varFunc.Call(c.ctx, "%d %s", 12, "a string is bad"), errors.New("delay: argument 3 has wrong type: string is not assignable to int"); got.Error() != want.Error() {
t.Errorf("Incorrect error: got %q, want %q", got, want)
}
}
func TestBadArguments(t *testing.T) {
// Try running regFunc with different sets of inappropriate arguments.
c := newFakeContext()
tests := []struct {
args []interface{} // all except context
wantErr string
}{
{
args: nil,
wantErr: "delay: too few arguments to func: 1 < 2",
},
{
args: []interface{}{"lala", 53},
wantErr: "delay: too many arguments to func: 3 > 2",
},
{
args: []interface{}{53},
wantErr: "delay: argument 1 has wrong type: int is not assignable to string",
},
}
for i, tc := range tests {
got := regFunc.Call(c.ctx, tc.args...)
if got.Error() != tc.wantErr {
t.Errorf("Call %v: got %q, want %q", i, got, tc.wantErr)
}
}
}
func TestRunningFunction(t *testing.T) {
c := newFakeContext()
// Fake out the adding of a task.
var task *taskqueue.Task
taskqueueAdder = func(_ context.Context, tk *taskqueue.Task, queue string) (*taskqueue.Task, error) {
if queue != "" {
t.Errorf(`Got queue %q, expected ""`, queue)
}
task = tk
return tk, nil
}
regFuncRuns, regFuncMsg = 0, "" // reset state
const msg = "Why, hello!"
regFunc.Call(c.ctx, msg)
// Simulate the Task Queue service.
req, err := http.NewRequest("POST", path, bytes.NewBuffer(task.Payload))
if err != nil {
t.Fatalf("Failed making http.Request: %v", err)
}
rw := httptest.NewRecorder()
runFunc(c.ctx, rw, req)
if regFuncRuns != 1 {
t.Errorf("regFuncRuns: got %d, want 1", regFuncRuns)
}
if regFuncMsg != msg {
t.Errorf("regFuncMsg: got %q, want %q", regFuncMsg, msg)
}
}
func TestCustomType(t *testing.T) {
c := newFakeContext()
// Fake out the adding of a task.
var task *taskqueue.Task
taskqueueAdder = func(_ context.Context, tk *taskqueue.Task, queue string) (*taskqueue.Task, error) {
if queue != "" {
t.Errorf(`Got queue %q, expected ""`, queue)
}
task = tk
return tk, nil
}
custFuncTally = 0 // reset state
custFunc.Call(c.ctx, &CustomType{N: 11}, CustomImpl(13))
// Simulate the Task Queue service.
req, err := http.NewRequest("POST", path, bytes.NewBuffer(task.Payload))
if err != nil {
t.Fatalf("Failed making http.Request: %v", err)
}
rw := httptest.NewRecorder()
runFunc(c.ctx, rw, req)
if custFuncTally != 24 {
t.Errorf("custFuncTally = %d, want 24", custFuncTally)
}
// Try the same, but with nil values; one is a nil pointer (and thus a non-nil interface value),
// and the other is a nil interface value.
custFuncTally = 0 // reset state
custFunc.Call(c.ctx, (*CustomType)(nil), nil)
// Simulate the Task Queue service.
req, err = http.NewRequest("POST", path, bytes.NewBuffer(task.Payload))
if err != nil {
t.Fatalf("Failed making http.Request: %v", err)
}
rw = httptest.NewRecorder()
runFunc(c.ctx, rw, req)
if custFuncTally != 5 {
t.Errorf("custFuncTally = %d, want 5", custFuncTally)
}
}
func TestRunningVariadic(t *testing.T) {
c := newFakeContext()
// Fake out the adding of a task.
var task *taskqueue.Task
taskqueueAdder = func(_ context.Context, tk *taskqueue.Task, queue string) (*taskqueue.Task, error) {
if queue != "" {
t.Errorf(`Got queue %q, expected ""`, queue)
}
task = tk
return tk, nil
}
varFuncMsg = "" // reset state
varFunc.Call(c.ctx, "Amiga %d has %d KB RAM", 500, 512)
// Simulate the Task Queue service.
req, err := http.NewRequest("POST", path, bytes.NewBuffer(task.Payload))
if err != nil {
t.Fatalf("Failed making http.Request: %v", err)
}
rw := httptest.NewRecorder()
runFunc(c.ctx, rw, req)
const expected = "Amiga 500 has 512 KB RAM"
if varFuncMsg != expected {
t.Errorf("varFuncMsg = %q, want %q", varFuncMsg, expected)
}
}
func TestErrorFunction(t *testing.T) {
c := newFakeContext()
// Fake out the adding of a task.
var task *taskqueue.Task
taskqueueAdder = func(_ context.Context, tk *taskqueue.Task, queue string) (*taskqueue.Task, error) {
if queue != "" {
t.Errorf(`Got queue %q, expected ""`, queue)
}
task = tk
return tk, nil
}
errFunc.Call(c.ctx)
// Simulate the Task Queue service.
// The first call should succeed; the second call should fail.
{
req, err := http.NewRequest("POST", path, bytes.NewBuffer(task.Payload))
if err != nil {
t.Fatalf("Failed making http.Request: %v", err)
}
rw := httptest.NewRecorder()
runFunc(c.ctx, rw, req)
}
{
req, err := http.NewRequest("POST", path, bytes.NewBuffer(task.Payload))
if err != nil {
t.Fatalf("Failed making http.Request: %v", err)
}
rw := httptest.NewRecorder()
runFunc(c.ctx, rw, req)
if rw.Code != http.StatusInternalServerError {
t.Errorf("Got status code %d, want %d", rw.Code, http.StatusInternalServerError)
}
wantLogging := [][]interface{}{
{"ERROR", "delay: func failed (will retry): %v", errFuncErr},
}
if !reflect.DeepEqual(c.logging, wantLogging) {
t.Errorf("Incorrect logging: got %+v, want %+v", c.logging, wantLogging)
}
}
}