Golang embed with echo and tests

embed.go

package server

import (
	"embed"
	"net/http"

	"github.com/labstack/echo/v4"
	"github.com/labstack/echo/v4/middleware"
)

// content holds our static web server content.
//go:embed static/*
var content embed.FS

var contentHandler = echo.WrapHandler(http.FileServer(http.FS(content)))
var contentRewrite = middleware.Rewrite(map[string]string{"/*": "/static/$1"})

embed_test.go

package server

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

	"github.com/labstack/echo/v4"
	"github.com/stretchr/testify/require"
)

func TestStaticEmbed(t *testing.T) {

	assert := require.New(t)

	f, err := content.Open("static/index.html")
	assert.NoError(err)

	assert.NotEmpty(f)
}

func TestEchoStatic(t *testing.T) {
	assert := require.New(t)
	e := echo.New()
	req := httptest.NewRequest(http.MethodGet, "/favicon.ico", nil)
	rec := httptest.NewRecorder()

	e.GET("/*", contentHandler, contentRewrite)

	e.ServeHTTP(rec, req)
	assert.Equal(http.StatusOK, rec.Code)
}

server.go

package server

import (
	"github.com/aws/aws-sdk-go/aws"
	"github.com/labstack/echo/v4"
	"github.com/wolfeidau/analytics-beacon/internal/flags"
)

// Setup setup handlers for the server and configure any service APIs
func Setup(cfg *flags.API, awscfg *aws.Config, e *echo.Echo) error {

	e.GET("/*", contentHandler, contentRewrite)

	return nil
}