improved config package test coverage

config/config.go

@@ -6,6 +6,8 @@ import (
 	"io"
 	"io/ioutil"
 
+	"os"
+
 	yaml "gopkg.in/yaml.v1"
 )
 
@@ -111,15 +113,14 @@ type Project struct {
 
 // Load config file
 func Load(file string) (config Project, err error) {
-	data, err := ioutil.ReadFile(file)
+	f, err := os.Open(file)
 	if err != nil {
-		return config, err
-	}
-	err = yaml.Unmarshal(data, &config)
 		return
+	}
+	return LoadReader(f)
 }
 
-// Load config via io.Reader
+// LoadReader config via io.Reader
 func LoadReader(fd io.Reader) (config Project, err error) {
 	data, err := ioutil.ReadAll(fd)
 	if err != nil {

config/config_test.go

@@ -1,9 +1,14 @@
 package config
 
 import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
 	"strings"
 	"testing"
 
+	"fmt"
+
 	"github.com/stretchr/testify/assert"
 )
 
@@ -26,3 +31,28 @@ fpm:
 	assert.Nil(err)
 	assert.Equal("http://goreleaser.github.io", prop.FPM.Homepage, "yaml did not load correctly")
 }
+
+type errorReader struct{}
+
+func (errorReader) Read(p []byte) (n int, err error) {
+	return 1, fmt.Errorf("error")
+}
+func TestLoadBadReader(t *testing.T) {
+	var assert = assert.New(t)
+	_, err := LoadReader(errorReader{})
+	assert.Error(err)
+}
+
+func TestFile(t *testing.T) {
+	var assert = assert.New(t)
+	f, err := ioutil.TempFile(os.TempDir(), "config")
+	assert.NoError(err)
+	_, err = Load(filepath.Join(f.Name()))
+	assert.NoError(err)
+}
+
+func TestFileNotFound(t *testing.T) {
+	var assert = assert.New(t)
+	_, err := Load("/nope/no-way.yml")
+	assert.Error(err)
+}