File: nrgin_context_test.go

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// Copyright 2020 New Relic Corporation. All rights reserved.
// SPDX-License-Identifier: Apache-2.0

// +build go1.7

package nrgin

import (
	"context"
	"errors"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/gin-gonic/gin"
	newrelic "github.com/newrelic/go-agent"
	"github.com/newrelic/go-agent/internal"
	"github.com/newrelic/go-agent/internal/integrationsupport"
)

func accessTransactionContextContext(c *gin.Context) {
	var ctx context.Context = c
	// Transaction is designed to take both a context.Context and a
	// *gin.Context.
	if txn := Transaction(ctx); nil != txn {
		txn.NoticeError(errors.New("problem"))
	}
	c.Writer.WriteString("accessTransactionContextContext")
}

func TestContextContextTransaction(t *testing.T) {
	app := integrationsupport.NewBasicTestApp()
	router := gin.Default()
	router.Use(Middleware(app))
	router.GET("/txn", accessTransactionContextContext)

	response := httptest.NewRecorder()
	req, err := http.NewRequest("GET", "/txn", nil)
	if err != nil {
		t.Fatal(err)
	}
	router.ServeHTTP(response, req)
	if respBody := response.Body.String(); respBody != "accessTransactionContextContext" {
		t.Error("wrong response body", respBody)
	}
	if response.Code != 200 {
		t.Error("wrong response code", response.Code)
	}
	app.ExpectTxnMetrics(t, internal.WantTxn{
		Name:      pkg + ".accessTransactionContextContext",
		IsWeb:     true,
		NumErrors: 1,
	})
}

func accessTransactionFromContext(c *gin.Context) {
	// This tests that FromContext will find the transaction added to a
	// *gin.Context and by nrgin.Middleware.
	if txn := newrelic.FromContext(c); nil != txn {
		txn.NoticeError(errors.New("problem"))
	}
	c.Writer.WriteString("accessTransactionFromContext")
}

func TestFromContext(t *testing.T) {
	app := integrationsupport.NewBasicTestApp()
	router := gin.Default()
	router.Use(Middleware(app))
	router.GET("/txn", accessTransactionFromContext)

	response := httptest.NewRecorder()
	req, err := http.NewRequest("GET", "/txn", nil)
	if err != nil {
		t.Fatal(err)
	}
	router.ServeHTTP(response, req)
	if respBody := response.Body.String(); respBody != "accessTransactionFromContext" {
		t.Error("wrong response body", respBody)
	}
	if response.Code != 200 {
		t.Error("wrong response code", response.Code)
	}
	app.ExpectTxnMetrics(t, internal.WantTxn{
		Name:      pkg + ".accessTransactionFromContext",
		IsWeb:     true,
		NumErrors: 1,
	})
}

func TestContextWithoutTransaction(t *testing.T) {
	txn := Transaction(context.Background())
	if txn != nil {
		t.Error("didn't expect a transaction", txn)
	}
	ctx := context.WithValue(context.Background(), internal.TransactionContextKey, 123)
	txn = Transaction(ctx)
	if txn != nil {
		t.Error("didn't expect a transaction", txn)
	}
}

func TestNewContextTransaction(t *testing.T) {
	// This tests that nrgin.Transaction will find a transaction added to
	// to a context using newrelic.NewContext.
	app := integrationsupport.NewBasicTestApp()
	txn := app.StartTransaction("name", nil, nil)
	ctx := newrelic.NewContext(context.Background(), txn)
	if tx := Transaction(ctx); nil != tx {
		tx.NoticeError(errors.New("problem"))
	}
	txn.End()

	app.ExpectTxnMetrics(t, internal.WantTxn{
		Name:      "name",
		IsWeb:     false,
		NumErrors: 1,
	})
}