Add examples/util test

examples/util/util_test.go

@@ -0,0 +1,54 @@
+package util_test
+
+import (
+	"testing"
+
+	"github.com/harukasan/go-libwebp/examples/util"
+)
+
+var PNGFiles = []string{
+	"butterfly.png",
+	"cosmos.png",
+	"fizyplankton.png",
+	"kinkaku.png",
+	"yellow-rose-3.png",
+}
+
+var WebPFiles = []string{
+	"butterfly.webp",
+	"cosmos.webp",
+	"fizyplankton.webp",
+	"kinkaku.webp",
+	"yellow-rose-3.webp",
+}
+
+func TestOpenFile(t *testing.T) {
+	for _, file := range PNGFiles {
+		util.OpenFile(file)
+	}
+	for _, file := range WebPFiles {
+		util.OpenFile(file)
+	}
+}
+
+func TestReadFile(t *testing.T) {
+	for _, file := range PNGFiles {
+		util.ReadFile(file)
+	}
+	for _, file := range WebPFiles {
+		util.ReadFile(file)
+	}
+}
+
+func TestCreateFile(t *testing.T) {
+	f := util.CreateFile("util_test")
+	f.Write([]byte{'o', 'k'})
+	f.Close()
+}
+
+func TestReadWritePNG(t *testing.T) {
+	for _, file := range PNGFiles {
+		png := util.ReadPNG(file)
+		util.WritePNG(png, "util_test_"+file)
+	}
+}