Problem executing main function test in Go

#When editor Xigua of php is developing the Go language, he often encounters problems when executing the main function for testing. This situation may cause the program to not function properly or produce unexpected results. In order to resolve this issue, we need to carefully troubleshoot the possible causes and take appropriate steps to fix the code. This article will introduce some common problems and solutions to help developers better deal with such situations.

Question content

I wrote this test a few months ago and it ran successfully without any errors and the init() function was never executed because I only called it from within the test handler function, but now it fails with the following error:

/usr/local/opt/go/libexec/bin/go tool test2json -t /private/var/folders/wt/fc27nzn51rdbvwvjzkl05hlc0000gs/T/GoLand/___TestHandleRequest_in_next_api_cmd_getAllRawTransportOrders.test -test.v -test.paniconexit0 -test.run ^\QTestHandleRequest\E$
{"level":"fatal","msg":"no configuration found:  not set","time":"2023-08-27T22:48:03+05:30"}

Process finished with the exit code 1

I know the test is calling the init() function, but why not earlier. Am I missing something to understand here?

init.go

//go:build !test
// +build !test

package main

import (
    "crypto/tls"
    "encoding/json"
    log "github.com/sirupsen/logrus"
    "os"

    "lib/storage/ssm"

    "next-api/aws/dynamodb"
    "next-api/cmd/utils"
    "next-api/config"
    "next-api/http"
)

func init() {
    // Log as JSON instead of the default ASCII formatter.
    log.SetFormatter(&log.JSONFormatter{})

    // Output to stdout instead of the default stderr
    // Can be any io.Writer, see below for File example
    log.SetOutput(os.Stdout)

    // Only log the warning severity or above.
    log.SetLevel(log.InfoLevel)

    var err error
    paramsRepo := ssm.NewRepository()

    configID, err := utils.GetEnv("CONFIG_ID")
    if err != nil {
        log.Fatal("no configuration found: ", err)
    }

    cfg, err = config.Load(configID, paramsRepo)
    if err != nil {
        log.Fatal("could not load config: ", err)
    }

    urls := http.URLs{}
    json.Unmarshal([]byte(cfg.MABES.URLs), &urls)

    // configure mTLS
    cert, err := tls.X509KeyPair([]byte(cfg.MABES.Certificate), []byte(cfg.MABES.PrivateKey))
    if err != nil {
        log.Fatal("could not create MABES certificate: ", err)
    }

    MABES, err = http.NewMABESClient(urls, http.WithTLS(cert))
    if err != nil {
        log.Fatal("could not create sofaClient client.", err)
    }

    NEXT = dynamodb.NewRepository(cfg.NEXT.Table)
}

main.go

package main

import (
    "encoding/json"
    "fmt"
    "github.com/aws/aws-lambda-go/events"
    "github.com/aws/aws-lambda-go/lambda"
    log "github.com/sirupsen/logrus"
    gohttp "net/http"

    "next-api/api"
    "next-api/config"
    "next-api/errors"
    "next-api/http"
    "next-api/http/problem"
    "next-api/mabes"
    "next-api/next"
)

var (
    cfg   config.Config
    MABES mabes.Client
    NEXT  next.Repository
)

func main() {
    lambda.Start(handler)
}

func handler(request events.APIGatewayProxyRequest) (events.APIGatewayProxyResponse, error) {
    facilityID := request.PathParameters["facilityID"]
    if facilityID == "" {
        return events.APIGatewayProxyResponse{
            StatusCode: gohttp.StatusBadRequest,
            Headers:    http.Headers("application/problem+json"),
            Body:       problem.ServerError(fmt.Errorf("missing facilityID parameter")).ToJSONResponse(),
        }, nil
    }

    transportOrders, err := api.GetAllRawTransportOrders(facilityID, request.QueryStringParameters, MABES, NEXT)
    b, err := json.Marshal(transportOrders)
    if err != nil {
        log.Errorln(err)

        if errors.Is(errors.NEXTRead, err) {
            return events.APIGatewayProxyResponse{
                StatusCode: gohttp.StatusOK,
                Headers:    http.Headers("application/json"),
                Body:       fmt.Sprintf(`{"data":%s}`, string(b)),
            }, nil
        }

        return events.APIGatewayProxyResponse{
            StatusCode: gohttp.StatusInternalServerError,
            Headers:    http.Headers("application/problem+json"),
            Body:       problem.ServerError(err).ToJSONResponse(),
        }, nil
    }

    return events.APIGatewayProxyResponse{
        StatusCode: gohttp.StatusOK,
        Headers:    http.Headers("application/json"),
        Body:       fmt.Sprintf(`{"data":%s}`, string(b)),
    }, nil
}

main_test.go

package main

import (
    "github.com/aws/aws-lambda-go/events"
    "github.com/stretchr/testify/assert"
    "net/http"
    "strings"
    "testing"
    "time"

    "next-api/api"
    "next-api/mabes"
    "next-api/next"
)

func TestHandleRequest(t *testing.T) {
    t.Run("should return the TransportOrders", func(t *testing.T) {
        req := events.APIGatewayProxyRequest{
            PathParameters: map[string]string{
                "facility": "11",
            },
        }
        timeStamp, _ := time.Parse(time.RFC3339, time.Now().Format(time.RFC3339))
        sofa1 := next.SofaTransferModel{}
        sofa1.Phase = "1"
        sofa1.PartKey.PartCode = "abcd"
        sofa1.PartKey.DispatcherFacility = "11"
        sofa1.PartKey.UsageCode = "01"
        sofa1.Storage.Number = "00315"
        sofa1.Shipment.RequestedArrivalDate = timeStamp.String()
        transportOrders := make([]next.SofaTransferModel, 0)
        transportOrders = append(transportOrders, sofa1)

        getAllRawTransportOrdersCalls := 0
        api.GetAllRawTransportOrders = func(facilityID string, params map[string]string, MABES mabes.Client, NEXT next.Repository) (next.SofaTransferObjects, error) {
            getAllRawTransportOrdersCalls++
            return transportOrders, nil
        }

        // when
        res, err := handler(req)
        // then
        assert.Equal(t, 1, getAllRawTransportOrdersCalls)

        assert.NoError(t, err)
        assert.Equal(t, http.StatusOK, res.StatusCode)

        assert.True(t, strings.Contains(res.Body, transportOrders[0].PartKey.PartCode))
        assert.True(t, strings.Contains(res.Body, transportOrders[0].Storage.Number))
    })

}

Workaround

The top-level function named init (all lowercase) is always , and is always in Test before is executed. init The reason why init is failing now, even if it wasn't before, seems to be a change in environment; i.e. before

CONFIG_ID

was set, but now it is not set, at least not in the shell where the test is executed. set up.

https://www.php.cn/link/905d8fc4ffb4275a428a84589810f8f4

If you run the go test command with -tags test, the build constraints at the top of the init.go file will be respected, which is // go:build !test and the file will be omitted from the test build. But by default, there is no "test" build tag, so without the -tags test parameter, these build constraints will be ignored and the init.go### file will be included in the test build . ### p>

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