Properly parse filenames of files stored without dot

Fixes kdomanski#9

Author: kdomanski

fixtures/test.iso

@@ -100,6 +100,11 @@ func (f *File) Name() string {
 	// assume only only one '.'
 	splitFileIdentifier := strings.Split(fileIdentifier, ".")
 
+	// there's no dot in the name, thus no extension
+	if len(splitFileIdentifier) == 1 {
+		return splitFileIdentifier[0]
+	}
+
 	// extension is empty, return just the name without a dot
 	if len(splitFileIdentifier[1]) == 0 {
 		return splitFileIdentifier[0]

image_reader.go

@@ -0,0 +1,47 @@
+package iso9660
+
+import (
+	"bytes"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+// Regresstion test for github.com/kdomanski/iso9660/issues/9
+func TestRegressionNameWithoutDot(t *testing.T) {
+	var buf bytes.Buffer
+
+	//
+	// create image with a file without dot
+	//
+	w, err := NewWriter()
+	assert.NoError(t, err)
+	defer func() {
+		if cleanupErr := w.Cleanup(); cleanupErr != nil {
+			t.Fatalf("failed to cleanup writer: %v", cleanupErr)
+		}
+	}()
+
+	err = w.AddFile(strings.NewReader("hrh2309hr320h"), "NODOT")
+	assert.NoError(t, err)
+
+	err = w.WriteTo(&buf, "testvolume")
+	assert.NoError(t, err)
+
+	//
+	// no read it
+	//
+
+	image, err := OpenImage(bytes.NewReader(buf.Bytes()))
+	assert.NoError(t, err)
+
+	rootDir, err := image.RootDir()
+	assert.NoError(t, err)
+
+	children, err := rootDir.GetChildren()
+	assert.NoError(t, err)
+
+	nodotfile := children[0]
+	assert.Equal(t, "nodot", nodotfile.Name())
+}