Add test for unixfs/format to reach 87% coverage.

License: MIT
Signed-off-by: Zander Mackie <zmackie@gmail.com>

unixfs/format_test.go

 package unixfs
 
 import (
+	"bytes"
 	"testing"
 
 	proto "gx/ipfs/QmZ4Qi3GaRbjcx28Sme5eMH7RQjGkt8wHxt2a65oLaeFEV/gogo-protobuf/proto"
@@ -11,9 +12,10 @@ import (
 func TestFSNode(t *testing.T) {
 	fsn := new(FSNode)
 	fsn.Type = TFile
-	for i := 0; i < 15; i++ {
+	for i := 0; i < 16; i++ {
 		fsn.AddBlockSize(100)
 	}
+	fsn.RemoveBlockSize(15)
 
 	fsn.Data = make([]byte, 128)
 
@@ -32,8 +34,128 @@ func TestFSNode(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
+	nKids := fsn.NumChildren()
+	if nKids != 15 {
+		t.Fatal("Wrong number of child nodes")
+	}
 
 	if ds != (100*15)+128 {
 		t.Fatal("Datasize calculations incorrect!")
 	}
+
+	nfsn, err := FSNodeFromBytes(b)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if nfsn.FileSize() != (100*15)+128 {
+		t.Fatal("fsNode FileSize calculations incorrect")
+	}
+}
+
+func TestPBdataTools(t *testing.T) {
+	raw := []byte{0x00, 0x01, 0x02, 0x17, 0xA1}
+	rawPB := WrapData(raw)
+
+	pbDataSize, err := DataSize(rawPB)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	same := len(raw) == int(pbDataSize)
+	if !same {
+		t.Fatal("WrapData changes the size of data.")
+	}
+
+	rawPBBytes, err := UnwrapData(rawPB)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	same = bytes.Equal(raw, rawPBBytes)
+	if !same {
+		t.Fatal("Unwrap failed to produce the correct wrapped data.")
+	}
+
+	rawPBdata, err := FromBytes(rawPB)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	isRaw := rawPBdata.GetType() == TRaw
+	if !isRaw {
+		t.Fatal("WrapData does not create pb.Data_Raw!")
+	}
+
+	catFile := []byte("Mr_Meowgie.gif")
+	catPBfile := FilePBData(catFile, 17)
+	catSize, err := DataSize(catPBfile)
+	if catSize != 17 {
+		t.Fatal("FilePBData is the wrong size.")
+	}
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	dirPB := FolderPBData()
+	dir, err := FromBytes(dirPB)
+	isDir := dir.GetType() == TDirectory
+	if !isDir {
+		t.Fatal("FolderPBData does not create a directory!")
+	}
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, dirErr := DataSize(dirPB)
+	if dirErr == nil {
+		t.Fatal("DataSize didn't throw an error when taking the size of a directory.")
+	}
+
+	catSym, err := SymlinkData("/ipfs/adad123123/meowgie.gif")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	catSymPB, err := FromBytes(catSym)
+	isSym := catSymPB.GetType() == TSymlink
+	if !isSym {
+		t.Fatal("Failed to make a Symlink.")
+	}
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	_, sizeErr := DataSize(catSym)
+	if sizeErr == nil {
+		t.Fatal("DataSize didn't throw an error when taking the size of a Symlink.")
+	}
+
+}
+
+func TestMetedata(t *testing.T) {
+	meta := &Metadata{
+		MimeType: "audio/aiff",
+		Size:     12345,
+	}
+
+	_, err := meta.Bytes()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	metaPB, err := BytesForMetadata(meta)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	meta, err = MetadataFromBytes(metaPB)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	mimeAiff := meta.MimeType == "audio/aiff"
+	if !mimeAiff {
+		t.Fatal("Metadata does not Marshal and Unmarshal properly!")
+	}
+
 }