check if datasource is set

config/config.go

@@ -112,10 +112,12 @@ func Load(path string) (config *Config, err error) {
 		return
 	}
 	config = &cfgFile.Clair
-	if config.API == nil || config.Database == nil || config.Notifier == nil || config.Updater == nil {
-		err = cerrors.ErrConfigNotLoaded
+
+	if config.Database.Source == "" {
+		err = cerrors.ErrDatasourceNotLoaded
 		return
 	}
+
 	// Generate a pagination key if none is provided.
 	if config.API.PaginationKey == "" {
 		var key fernet.Key

config/config_test.go

@@ -15,6 +15,34 @@ dummyKey:
     wrong:true
 `
 
+const goodConfig = `
+clair:
+  database:
+    source: postgresql://postgres:root@postgres:5432?sslmode=disable
+    cacheSize: 16384
+  api:
+    port: 6060
+    healthport: 6061
+    timeout: 900s
+    paginationKey:
+    servername:
+    cafile:
+    keyfile:
+    certfile:
+  updater:
+    interval: 2h
+  notifier:
+    attempts: 3
+    renotifyInterval: 2h
+    http:
+      endpoint:
+      servername:
+      cafile:
+      keyfile:
+      certfile:
+      proxy:
+`
+
 func TestLoadWrongConfiguration(t *testing.T) {
 	tmpfile, err := ioutil.TempFile("", "clair-config")
 	if err != nil {
@@ -22,7 +50,6 @@ func TestLoadWrongConfiguration(t *testing.T) {
 	}
 
 	defer os.Remove(tmpfile.Name()) // clean up
-
 	if _, err := tmpfile.Write([]byte(wrongConfig)); err != nil {
 		log.Fatal(err)
 	}
@@ -32,10 +59,24 @@ func TestLoadWrongConfiguration(t *testing.T) {
 
 	_, err = Load(tmpfile.Name())
 
-	assert.EqualError(t, err, cerrors.ErrConfigNotLoaded.Error())
+	assert.EqualError(t, err, cerrors.ErrDatasourceNotLoaded.Error())
 }
 
 func TestLoad(t *testing.T) {
-	_, err := Load("../config.example.yaml")
+	tmpfile, err := ioutil.TempFile("", "clair-config")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	defer os.Remove(tmpfile.Name()) // clean up
+
+	if _, err := tmpfile.Write([]byte(goodConfig)); err != nil {
+		log.Fatal(err)
+	}
+	if err := tmpfile.Close(); err != nil {
+		log.Fatal(err)
+	}
+
+	_, err = Load(tmpfile.Name())
 	assert.NoError(t, err)
 }

utils/errors/errors.go

@@ -30,8 +30,8 @@ var (
 	// ErrCouldNotParse is returned when a fetcher fails to parse the update data.
 	ErrCouldNotParse = errors.New("updater/fetchers: could not parse")
 
-	//ErrConfigNotLoaded is returned when the configuration file is not loaded properly
-	ErrConfigNotLoaded = errors.New("could not load configuration properly")
+	// ErrDatasourceNotLoaded is returned when the datasource variable in the configuration file is not loaded properly
+	ErrDatasourceNotLoaded = errors.New("could not load datasource configuration properly")
 )
 
 // ErrBadRequest occurs when a method has been passed an inappropriate argument.