Add tests for config package (failing for now)

Makefile

@@ -1,2 +1,7 @@
+.PHONY: all test
+
 all:
 	go build -o telegabber
+
+test:
+	go test -v ./config

config/config.go

@@ -1,8 +1,8 @@
 package config
 
 import (
+	"github.com/pkg/errors"
 	"io/ioutil"
-	"log"
 
 	"gopkg.in/yaml.v2"
 )
@@ -47,18 +47,18 @@ type TelegramTdlibClientConfig struct {
 	UseChatInfoDatabase bool   `yaml:":use_chat_info_database"`
 }
 
-func ReadConfig(path string) Config {
+func ReadConfig(path string) (Config, error) {
 	var config Config
 
 	file, err := ioutil.ReadFile(path)
 	if err != nil {
-		log.Fatalf("Can't open config file: %v", err)
+		return config, errors.Wrap(err, "Can't open config file")
 	}
 
 	err = yaml.Unmarshal(file, &config)
 	if err != nil {
-		log.Fatalf("Error parsing config: %v", err)
+		return config, errors.Wrap(err, "Error parsing config")
 	}
 
-	return config
+	return config, nil
 }

config/config_test.go

@@ -0,0 +1,26 @@
+package config
+
+import (
+	"testing"
+)
+
+func TestNoConfig(t *testing.T) {
+	_, err := ReadConfig("../test/sfklase.yml")
+	if err == nil {
+		t.Errorf("Non-existent config was successfully read")
+	}
+}
+
+func TestGoodConfig(t *testing.T) {
+	_, err := ReadConfig("../test/good_config.yml")
+	if err != nil {
+		t.Errorf("Good config is not accepted: %v", err)
+	}
+}
+
+func TestBadConfig(t *testing.T) {
+	_, err := ReadConfig("../test/bad_config.yml")
+	if err == nil {
+		t.Errorf("Bad config is accepted but it shoudn't!")
+	}
+}

go.mod

@@ -3,6 +3,7 @@ module dev.narayana.im/narayana/telegabber
 go 1.13
 
 require (
+	github.com/pkg/errors v0.8.1
 	gopkg.in/yaml.v2 v2.2.4
 	gosrc.io/xmpp v0.1.3
 )

go.sum

@@ -1,4 +1,6 @@
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
+github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
+github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7 h1:9zdDQZ7Thm29KFXgAX/+yaf3eVbP7djjWp/dXAppNCc=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

telegabber.go

@@ -10,7 +10,11 @@ import (
 const CONFIG_PATH string = "config.yml"
 
 func main() {
-	config := config.ReadConfig(CONFIG_PATH)
+	config, err := config.ReadConfig(CONFIG_PATH)
+	if err != nil {
+		log.Fatal(err)
+	}
+
 	cm := xmpp.NewComponent(config.Xmpp)
 
 	// reconnect automatically

test/bad_config.yml

@@ -0,0 +1,22 @@
+:telegram:
+    :loglevel: :warn
+    :content:
+        :path: '/var/www/telegabber/content' # webserver workdir
+        :link: 'http://tlgrm.localhost/content' # webserver public address
+        :upload: 'https:///xmppfiles.localhost' # xmpp http upload address
+    :tdlib_verbosity: 1
+    :tdlib:
+        :lib_path: 'lib/'
+        :client:
+            :api_id: '17349'
+            :api_hash: '344583e45741c457fe1862106095a5eb'
+            :device_model: 'telegabber'
+            :application_version: '2.0'
+            :use_cat_info_database: false
+
+:xmpp:
+    :loglevel: :warn
+    :host: '127.0.0.1'
+    :port: 8899
+    :password: 'password'
+    :db: 'sessions.dat'

test/good_config.yml

@@ -0,0 +1,23 @@
+:telegram:
+    :loglevel: :warn
+    :content:
+        :path: '' # webserver workdir
+        :link: '' # webserver public address
+        :upload: '' # xmpp http upload address
+    :tdlib_verbosity: 1
+    :tdlib:
+        :lib_path: 'lib/'
+        :client:
+            :api_id: '17349'
+            :api_hash: '344583e45741c457fe1862106095a5eb'
+            :device_model: 'telegabber'
+            :application_version: '2.0'
+            :use_chat_info_database: false
+
+:xmpp:
+    :loglevel: :warn
+    :jid: 'tlgrm.localhost'
+    :host: '127.0.0.1'
+    :port: 8899
+    :password: 'password'
+    :db: 'sessions.dat'