feat: support multiple outputs

type_test.go

@@ -0,0 +1,50 @@
+package bimg
+
+import (
+	"io/ioutil"
+	"os"
+	"path"
+	"testing"
+)
+
+func TestDeterminateImageType(t *testing.T) {
+	files := []struct {
+		name     string
+		expected ImageType
+	}{
+		{"test.jpg", JPEG},
+		{"test.png", PNG},
+		{"test.webp", WEBP},
+	}
+
+	for _, file := range files {
+		img, _ := os.Open(path.Join("fixtures", file.name))
+		buf, _ := ioutil.ReadAll(img)
+		defer img.Close()
+
+		if DetermineImageType(buf) != file.expected {
+			t.Fatal("Image type is not valid")
+		}
+	}
+}
+
+func TestDeterminateImageTypeName(t *testing.T) {
+	files := []struct {
+		name     string
+		expected string
+	}{
+		{"test.jpg", "jpeg"},
+		{"test.png", "png"},
+		{"test.webp", "webp"},
+	}
+
+	for _, file := range files {
+		img, _ := os.Open(path.Join("fixtures", file.name))
+		buf, _ := ioutil.ReadAll(img)
+		defer img.Close()
+
+		if DetermineImageTypeName(buf) != file.expected {
+			t.Fatal("Image type is not valid")
+		}
+	}
+}