feat: add file helper

file.go

@@ -0,0 +1,20 @@
+package bimg
+
+import (
+	"io/ioutil"
+	"os"
+)
+
+func Read(path string) ([]byte, error) {
+	data, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+
+	buf, err := ioutil.ReadAll(data)
+	if err != nil {
+		return nil, err
+	}
+
+	return buf, nil
+}

file_test.go

@@ -0,0 +1,21 @@
+package bimg
+
+import (
+	"testing"
+)
+
+func TestRead(t *testing.T) {
+	buf, err := Read("fixtures/test.jpg")
+
+	if err != nil {
+		t.Errorf("Cannot read the image: %#v", err)
+	}
+
+	if len(buf) == 0 {
+		t.Fatal("Empty buffer")
+	}
+
+	if DetermineImageType(buf) != JPEG {
+		t.Fatal("Image is not jpeg")
+	}
+}

image_test.go

@@ -3,12 +3,11 @@ package bimg
 import (
 	"io/ioutil"
 	"os"
-	"path"
 	"testing"
 )
 
 func TestImageResize(t *testing.T) {
-	data, _ := os.Open(path.Join("fixtures/test.jpg"))
+	data, _ := os.Open("fixtures/test.jpg")
 	buf, err := ioutil.ReadAll(data)
 
 	image := NewImage(buf)