added some tests

Makefile

@@ -18,7 +18,7 @@ build: generate
 	env GOARCH=amd64 GOOS=linux go build -o dist/${BIN_NAME}_linux_amd64
 
 test: generate
-	go test ./...
+	go test ./... -cover
 
 watch:
 	modd

cmd/root.go

@@ -68,12 +68,12 @@ func init() {
 	viper.AddConfigPath(fmt.Sprintf("/etc%c%s", os.PathSeparator, dirName))
 	viper.SetConfigName("config.toml")
 	viper.SetEnvPrefix("hasshelper")
-	viper.Set("version", gitVersion)
-	viper.SetDefault("deployment", "prod")
-	viper.SetDefault("loglevel", "info")
 }
 
 func initConfig() {
+	viper.Set("version", gitVersion)
+	viper.SetDefault("deployment", "prod")
+	viper.SetDefault("loglevel", "info")
 	viper.AutomaticEnv()
 	if cfgFile != "" {
 		viper.SetConfigFile(cfgFile)

cmd/root_test.go

@@ -1,15 +1,39 @@
 package cmd
 
 import (
+	"os"
+	"os/exec"
 	"testing"
 
 	"github.com/spf13/viper"
+	"github.com/stretchr/testify/assert"
 )
 
 func TestInitConfig(t *testing.T) {
+	viper.Reset()
 	viper.Set("deployment", "testing")
 	viper.Set("image_dir", "/tmp")
 	viper.Set("webserver_port", "8080")
 
 	initConfig()
+	assert.Equal(t, gitVersion, viper.GetString("version"), "config version mismatch")
+}
+
+func TestInitConfigMissingImageDir(t *testing.T) {
+	if os.Getenv("TEST_MISSING_INPUT") == "1" {
+		viper.Reset()
+		viper.Set("deployment", "testing")
+		viper.Set("version", "vTest")
+		viper.Set("webserver_port", "8080")
+
+		initConfig()
+		return
+	}
+	cmd := exec.Command(os.Args[0], "-test.run=TestInitConfigMissingImageDir")
+	cmd.Env = append(os.Environ(), "TEST_MISSING_INPUT=1")
+	err := cmd.Run()
+	if e, ok := err.(*exec.ExitError); ok && !e.Success() {
+		return
+	}
+	t.Fatalf("process ran with err %v, want exit status 1", err)
 }

go.mod

@@ -9,6 +9,7 @@ require (
 	github.com/rs/zerolog v1.27.0
 	github.com/spf13/cobra v1.5.0
 	github.com/spf13/viper v1.12.0
+	github.com/stretchr/testify v1.8.0
 	golang.org/x/net v0.0.0-20220812174116-3211cb980234
 )
 
@@ -24,6 +25,7 @@ require (
 	github.com/cortesi/moddwatch v0.0.0-20210323234936-df014e95c743 // indirect
 	github.com/cortesi/termlog v0.0.0-20210222042314-a1eec763abec // indirect
 	github.com/daaku/go.zipexe v1.0.1 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dustin/go-humanize v1.0.0 // indirect
 	github.com/emirpasic/gods v1.18.1 // indirect
 	github.com/fatih/color v1.13.0 // indirect
@@ -46,6 +48,7 @@ require (
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/pelletier/go-toml v1.9.5 // indirect
 	github.com/pelletier/go-toml/v2 v2.0.3 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/rjeczalik/notify v0.0.0-20181126183243-629144ba06a1 // indirect
 	github.com/sergi/go-diff v1.2.0 // indirect
 	github.com/spf13/afero v1.9.2 // indirect

web/handlers.go

@@ -19,22 +19,23 @@ func imageHandler() http.Handler {
 func chooseRandomFile(ctx context.Context, imageDir string) (filepath string, err error) {
 	validEntries := make([]string, 0)
 	log := config.logger.With().Str("imageDir", imageDir).Logger()
-	err = fs.WalkDir(os.DirFS(imageDir), ".", func(path string, d fs.DirEntry, err error) error {
-		if err != nil {
-			log.Error().Err(err).Msg("Error walking directory")
-			return err
-		}
-		if ctxErr := ctx.Err(); ctxErr != nil {
-			log.Error().Err(ctxErr).Msg("Context closed while walking directory")
-			return ctxErr
-		}
-		if d.Type().IsRegular() {
-			filename := fmt.Sprintf("%s%c%s", imageDir, os.PathSeparator, d.Name())
-			log.Debug().Str("filename", filename).Msg("file scan")
-			validEntries = append(validEntries, filename)
-		}
-		return nil
-	})
+	err = fs.WalkDir(
+		os.DirFS(imageDir), ".", func(path string, d fs.DirEntry, err error) error {
+			if err != nil {
+				log.Error().Err(err).Msg("Error walking directory")
+				return err
+			}
+			if ctxErr := ctx.Err(); ctxErr != nil {
+				log.Error().Err(ctxErr).Msg("Context closed while walking directory")
+				return ctxErr
+			}
+			if d.Type().IsRegular() {
+				filename := fmt.Sprintf("%s%c%s", imageDir, os.PathSeparator, d.Name())
+				log.Debug().Str("filename", filename).Msg("file scan")
+				validEntries = append(validEntries, filename)
+			}
+			return nil
+		})
 	if err != nil {
 		return
 	}