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mux_test.go
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mux_test.go
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package e5e_test
import (
"context"
"encoding/json"
"errors"
"fmt"
"math"
"os"
"reflect"
"strings"
"testing"
"go.anx.io/e5e/v2"
)
type IntegrationTestPayload struct {
A int `json:"a"`
B int `json:"b"`
}
type IntegrationTestContext struct {
AuthKey string `json:"Auth-Key"`
}
var (
stdoutTerminationSequence = strings.Repeat("\x00", 5)
daemonTerminationSequence = strings.Repeat("\x00", 6)
)
func buildOptions(entrypoint string) []string {
return []string{
"test-binary",
entrypoint,
stdoutTerminationSequence,
"0",
daemonTerminationSequence,
}
}
// we use a simplified type here in order to make the tests less cluttered
type testHandlerFunc func(*testing.T, e5e.Request[IntegrationTestPayload, IntegrationTestContext]) (*e5e.Result, error)
var (
defaultPayload, _ = json.Marshal(map[string]interface{}{
"event": map[string]interface{}{
"params": map[string][]string{
"test-param": {"a", "b"},
},
"data": map[string]int{
"a": 2,
"b": 3,
},
"request_headers": map[string]string{
"test-header": "test-header-value",
},
"type": "object",
},
"context": map[string]interface{}{
"async": false,
"date": "2022-08-04T14:15:53.885414",
"type": "go-library-test",
"data": map[string]string{
"Auth-Key": "my-auth-key",
},
},
})
expectedRequest = e5e.Request[IntegrationTestPayload, IntegrationTestContext]{
Event: e5e.Event[IntegrationTestPayload]{
Params: map[string][]string{
"test-param": {"a", "b"},
},
RequestHeaders: map[string]string{
"test-header": "test-header-value",
},
Type: e5e.EventDataTypeObject,
Data: IntegrationTestPayload{A: 2, B: 3},
},
Context: e5e.Context[IntegrationTestContext]{
Async: false,
Date: "2022-08-04T14:15:53.885414",
Type: "go-library-test",
Data: IntegrationTestContext{
AuthKey: "my-auth-key",
},
},
}
defaultHandler testHandlerFunc = func(*testing.T, e5e.Request[IntegrationTestPayload, IntegrationTestContext]) (*e5e.Result, error) {
return &e5e.Result{}, nil
}
)
func invokeE5E(t *testing.T, stdin string) (stdout, stderr string) {
t.Helper()
ctx, cancel := context.WithCancel(context.Background())
t.Cleanup(cancel)
stdio := redirectStdio(t, stdin)
os.Args = buildOptions(t.Name())
e5e.Start(ctx)
stdout, stderr = stdio.ReadAndRestore()
return
}
func TestResponse(t *testing.T) {
tests := []struct {
name string
stdin string
handler testHandlerFunc
result string
stdout string
stderr string
}{
{
name: "empty result",
handler: func(*testing.T, e5e.Request[IntegrationTestPayload, IntegrationTestContext]) (*e5e.Result, error) {
return &e5e.Result{Data: nil}, nil
},
result: `{"result":{"data":null}}`,
},
{
name: "nil result",
handler: func(*testing.T, e5e.Request[IntegrationTestPayload, IntegrationTestContext]) (*e5e.Result, error) {
return &e5e.Result{Status: 200}, nil
},
result: `{"result":{"status":200,"data":null}}`,
},
{
name: "print stdout",
stdout: "print",
stderr: "error print",
handler: func(*testing.T, e5e.Request[IntegrationTestPayload, IntegrationTestContext]) (*e5e.Result, error) {
fmt.Print("print")
_, _ = fmt.Fprint(os.Stderr, "error print")
return nil, nil
},
result: `{"result":null}`,
},
{
name: "sum",
handler: func(t *testing.T, r e5e.Request[IntegrationTestPayload, IntegrationTestContext]) (*e5e.Result, error) {
return &e5e.Result{Data: r.Data().A + r.Data().B}, nil
},
result: `{"result":{"data":5}}`,
},
{
name: "request contains all keys and values",
handler: func(t *testing.T, r e5e.Request[IntegrationTestPayload, IntegrationTestContext]) (*e5e.Result, error) {
DeepEqual(t, r, expectedRequest, "request does not match")
return &e5e.Result{}, nil
},
result: `{"result":{"data":null}}`,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if len(tt.stdin) == 0 {
tt.stdin = string(defaultPayload)
}
if tt.handler == nil {
tt.handler = defaultHandler
}
e5e.AddHandlerFunc(t.Name(), func(ctx context.Context, r e5e.Request[IntegrationTestPayload, IntegrationTestContext]) (*e5e.Result, error) {
return tt.handler(t, r)
})
stdout, stderr := invokeE5E(t, tt.stdin)
expectedStdout := fmt.Sprintf("%s%s%s", tt.stdout, stdoutTerminationSequence, tt.result)
Equal(t, expectedStdout, stdout, "stdout does not match")
Equal(t, tt.stderr, stderr, "stderr does not match")
})
}
}
func TestErrors(t *testing.T) {
tests := []struct {
name string
entrypoint string
handler testHandlerFunc
error error
}{
{
name: "invalid entrypoint",
entrypoint: "does_not_exist",
error: &e5e.InvalidEntrypointError{Entrypoint: "does_not_exist"},
},
{
name: "handler returns error",
handler: func(t *testing.T, r e5e.Request[IntegrationTestPayload, IntegrationTestContext]) (*e5e.Result, error) {
return nil, errors.New("error")
},
},
{
name: "invalid result (infinity)",
handler: func(t *testing.T, r e5e.Request[IntegrationTestPayload, IntegrationTestContext]) (*e5e.Result, error) {
return &e5e.Result{Data: math.Inf(0)}, nil
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if tt.handler == nil {
tt.handler = defaultHandler
}
e5e.AddHandlerFunc(t.Name(), func(ctx context.Context, r e5e.Request[IntegrationTestPayload, IntegrationTestContext]) (*e5e.Result, error) {
return tt.handler(t, r)
})
defer func() {
r := recover()
if r == nil {
t.Fatalf("expected panic, got none")
}
err, _ := r.(error)
if tt.error != nil {
Equal(t, tt.error.Error(), err.Error(), "errors do not match")
}
}()
entrypoint := t.Name()
if tt.entrypoint != "" {
entrypoint = tt.entrypoint
}
os.Args = buildOptions(entrypoint)
redirectStdio(t, string(defaultPayload))
e5e.Start(context.Background())
})
}
}
func TestKeepAlive(t *testing.T) {
var payload strings.Builder
payload.WriteString("ping")
payload.WriteRune('\n')
payload.WriteString("ping")
payload.WriteRune('\n')
payload.Write(defaultPayload)
payload.WriteRune('\n')
payload.WriteString("ping")
payload.WriteRune('\n')
payload.Write(defaultPayload)
payload.WriteRune('\n')
e5e.AddHandlerFunc(t.Name(), func(ctx context.Context, r e5e.Request[IntegrationTestPayload, any]) (*e5e.Result, error) {
return &e5e.Result{Data: r.Data().A + r.Data().B}, nil
})
stdio := redirectStdio(t, payload.String())
os.Args = []string{
"test-binary",
t.Name(),
stdoutTerminationSequence,
"1",
daemonTerminationSequence,
}
e5e.Start(context.Background())
stdout, stderr := stdio.ReadAndRestore()
expectedOutputs := []string{
"pong",
"pong",
`{"result":{"data":5}}`,
"pong",
`{"result":{"data":5}}`,
}
var expectedStdout strings.Builder
for _, v := range expectedOutputs {
expectedStdout.WriteString(stdoutTerminationSequence)
expectedStdout.WriteString(v)
expectedStdout.WriteString(daemonTerminationSequence)
}
expectedStderr := strings.Repeat(daemonTerminationSequence, len(expectedOutputs))
Equal(t, expectedStdout.String(), stdout, "stdout does not match")
Equal(t, expectedStderr, stderr, "stderr does not match")
}
func TestCancellation(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
cancel() // cancel it immediately
stdio := redirectStdio(t, string(defaultPayload))
e5e.AddHandlerFunc(t.Name(), func(ctx context.Context, r e5e.Request[IntegrationTestPayload, any]) (*e5e.Result, error) {
return &e5e.Result{
Data: r.Data().A + r.Data().B,
}, nil
})
e5e.Start(ctx)
stdout, stderr := stdio.ReadAndRestore()
// We shouldn't even have any content here.
Equal(t, "", stdout, "stdout does not match")
Equal(t, "", stderr, "stderr does not match")
}
func Equal[T comparable](t *testing.T, expected, actual T, message string) {
t.Helper()
if actual != expected {
t.Fatalf("%s:\n\tgot:\t%v\n\twanted:\t%v", message, actual, expected)
}
}
func DeepEqual(t *testing.T, expected interface{}, actual interface{}, message string) {
t.Helper()
if !reflect.DeepEqual(actual, expected) {
t.Fatalf("%s:\n\tgot:\t%+v\n\twanted:\t%+v", message, actual, expected)
}
}