utils/fs: add Remove(). (#94)

Author: smola

utils/fs/fs.go

@@ -22,6 +22,7 @@ type Filesystem interface {
 	ReadDir(path string) ([]FileInfo, error)
 	TempFile(dir, prefix string) (File, error)
 	Rename(from, to string) error
+	Remove(filename string) error
 	Join(elem ...string) string
 	Dir(path string) Filesystem
 	Base() string

utils/fs/os/os.go

@@ -100,6 +100,11 @@ func (fs *OS) Stat(filename string) (FileInfo, error) {
 	return os.Stat(fullpath)
 }
 
+func (fs *OS) Remove(filename string) error {
+	fullpath := fs.Join(fs.base, filename)
+	return os.Remove(fullpath)
+}
+
 func (fs *OS) TempFile(dir, prefix string) (File, error) {
 	fullpath := fs.Join(fs.base, dir)
 	if err := fs.createDir(fullpath + string(os.PathSeparator)); err != nil {

utils/fs/test/fs_suite.go

@@ -149,6 +149,28 @@ func (s *FilesystemSuite) TestOpenAndStat(c *C) {
 	c.Assert(stat.Name(), Equals, "foo")
 }
 
+func (s *FilesystemSuite) TestRemove(c *C) {
+	f, err := s.Fs.Create("foo")
+	c.Assert(err, IsNil)
+	c.Assert(f.Close(), IsNil)
+
+	err = s.Fs.Remove("foo")
+	c.Assert(err, IsNil)
+}
+
+func (s *FilesystemSuite) TestRemoveNonExisting(c *C) {
+	c.Assert(s.Fs.Remove("NON-EXISTING"), NotNil)
+}
+
+func (s *FilesystemSuite) TestRemoveTempFile(c *C) {
+	f, err := s.Fs.TempFile("test-dir", "test-prefix")
+	fn := f.Filename()
+	c.Assert(err, IsNil)
+	c.Assert(f.Close(), IsNil)
+
+	c.Assert(s.Fs.Remove(fn), IsNil)
+}
+
 func (s *FilesystemSuite) TestJoin(c *C) {
 	c.Assert(s.Fs.Join("foo", "bar"), Equals, "foo/bar")
 }