adds error test for config

config/config.go

@@ -2,7 +2,6 @@ package config
 
 import (
 	"log"
-	"os"
 
 	"github.com/spf13/viper"
 )
@@ -49,7 +48,7 @@ func createDefaultConf() *Conf {
 }
 
 // GetConf returns config values
-func GetConf(filename string) *Conf {
+func GetConf(filename string) (*Conf, error) {
 
 	cnf := createDefaultConf()
 
@@ -57,18 +56,17 @@ func GetConf(filename string) *Conf {
 	vv.SetConfigName(filename)
 	vv.SetConfigType("yaml")
 	vv.AddConfigPath(".")
-	log.Printf("Initialising config with filename %s", filename)
 
 	err := vv.ReadInConfig()
 	if err != nil {
-		log.Fatal("Could not load config file: \n", err)
-		os.Exit(1)
+		log.Print("Could not load config file: \n", err)
+		return nil, err
 	}
 
 	err = vv.Unmarshal(&cnf)
 	if err != nil {
-		log.Fatal("Could not read config file into struct: \n", err)
-		os.Exit(1)
+		log.Print("Could not read config file into struct: \n", err)
+		return nil, err
 	}
-	return cnf
+	return cnf, nil
 }

config/config_test.go

@@ -10,7 +10,8 @@ import (
 func TestSample(t *testing.T) {
 	assert := assert.New(t)
 
-	conf := config.GetConf("config-sample")
+	conf, err := config.GetConf("config-sample")
+	assert.Nil(err)
 
 	appConf := conf.App
 	assert.Equal("devel", appConf.Environment)
@@ -25,10 +26,11 @@ func TestSample(t *testing.T) {
 	assert.Equal("g2", dbConf.Database)
 }
 
-func TestMissing(t *testing.T) {
+func TestDefault(t *testing.T) {
 	assert := assert.New(t)
 
-	conf := config.GetConf("config-missing-fields")
+	conf, err := config.GetConf("config-missing-fields")
+	assert.Nil(err)
 
 	appConf := conf.App
 	assert.Equal("missingfield", appConf.Environment)
@@ -42,3 +44,11 @@ func TestMissing(t *testing.T) {
 	assert.Equal("<password>", dbConf.Password)
 	assert.Equal("gogmagog", dbConf.Database)
 }
+
+func TestMissingFile(t *testing.T) {
+	assert := assert.New(t)
+
+	conf, err := config.GetConf("non-existent")
+	assert.Nil(conf)
+	assert.NotNil(err)
+}

main.go

@@ -5,11 +5,16 @@ import (
 	"gitea.deepak.science/deepak/gogmagog/db"
 	"gitea.deepak.science/deepak/gogmagog/models"
 	"log"
+	"os"
 )
 
 func main() {
 	// Config
-	conf := config.GetConf("config")
+	conf, err := config.GetConf("config")
+	if err != nil {
+		log.Fatal("Could not get config", err)
+		os.Exit(1)
+	}
 
 	appConf := conf.App
 	port := appConf.Port