Refactoring and first steps to make multi OS compatible.

- Using cgofuse to be compatible with multiple OSes
- Refactor to make possible better testing
- Add a bunch of tests
- Add code coverage

Signed-off-by: Antonio Navarro Perez <antnavper@gmail.com>

iio/disk.go

@@ -20,7 +20,7 @@ type DiskTeeReader struct {
 	tr io.Reader
 }
 
-func NewDiskTeeReader(r io.Reader) (*DiskTeeReader, error) {
+func NewDiskTeeReader(r io.Reader) (Reader, error) {
 	fr, err := ioutil.TempFile("", "dtb_tmp")
 	if err != nil {
 		return nil, err

iio/disk_test.go

@@ -11,6 +11,8 @@ import (
 var testData []byte = []byte("Hello World")
 
 func TestReadData(t *testing.T) {
+	t.Parallel()
+
 	require := require.New(t)
 
 	br := bytes.NewReader(testData)
@@ -31,6 +33,8 @@ func TestReadData(t *testing.T) {
 }
 
 func TestReadDataEOF(t *testing.T) {
+	t.Parallel()
+
 	require := require.New(t)
 
 	br := bytes.NewReader(testData)

iio/reader.go

@@ -0,0 +1,9 @@
+package iio
+
+import "io"
+
+type Reader interface {
+	io.ReaderAt
+	io.Closer
+	io.Reader
+}

iio/utils.go

@@ -1,22 +0,0 @@
-package iio
-
-import (
-	"io"
-
-	log "github.com/sirupsen/logrus"
-)
-
-func CloseIfCloseable(r interface{}) error {
-	log.Debug("closing file...")
-	if r == nil {
-		return nil
-	}
-
-	closer, ok := r.(io.Closer)
-	if !ok {
-		log.Debug("file is not implementing close method")
-		return nil
-	}
-
-	return closer.Close()
-}

iio/wrapper.go

@@ -10,9 +10,10 @@ type readAtWrapper struct {
 
 	io.ReadSeeker
 	io.ReaderAt
+	io.Closer
 }
 
-func NewReadAtWrapper(r io.ReadSeeker) io.ReaderAt {
+func NewReadAtWrapper(r io.ReadSeeker) Reader {
 	return &readAtWrapper{ReadSeeker: r}
 }
 
@@ -26,3 +27,12 @@ func (rw *readAtWrapper) ReadAt(p []byte, off int64) (int, error) {
 
 	return rw.Read(p)
 }
+
+func (rw *readAtWrapper) Close() error {
+	c, ok := rw.ReadSeeker.(io.Closer)
+	if !ok {
+		return nil
+	}
+
+	return c.Close()
+}