embedfs: Align Capabilities with supported features

Signed-off-by: Paulo Gomes <[email protected]>

Author: pjbgf

embedfs/embed.go

@@ -92,6 +92,10 @@ func (fs *Embed) ReadDir(path string) ([]fs.DirEntry, error) {
 	return fs.underlying.ReadDir(path)
 }
 
+func (fs *Embed) Capabilities() billy.Capability {
+	return billy.ReadCapability | billy.SeekCapability
+}
+
 // Chroot is not supported.
 //
 // Calls will always return billy.ErrNotSupported.

embedfs/embed_test.go

@@ -354,3 +354,13 @@ func TestJoin(t *testing.T) {
 		})
 	}
 }
+
+func TestCapabilities(t *testing.T) {
+	fs := New(&testdataDir)
+	_, ok := fs.(billy.Capable)
+	assert.True(t, ok)
+
+	want := billy.ReadCapability | billy.SeekCapability
+	got := billy.Capabilities(fs)
+	assert.Equal(t, want, got)
+}