tar/asm: additional GNU LongLink testcase

Adding a minimal test case for GNU @LongLink.
Tested that it fails on v0.9.5, but now passes on v0.9.6 and master.

tar/asm/assemble_test.go

@@ -113,12 +113,18 @@ func TestTarStreamMangledGetterPutter(t *testing.T) {
 }
 
 func TestTarStream(t *testing.T) {
-	var (
-		expectedSHA1Sum       = "1eb237ff69bca6e22789ecb05b45d35ca307adbd"
-		expectedSize    int64 = 10240
-	)
+	testCases := []struct {
+		path            string
+		expectedSHA1Sum string
+		expectedSize    int64
+	}{
+		{"./testdata/t.tar.gz", "1eb237ff69bca6e22789ecb05b45d35ca307adbd", 10240},
+		{"./testdata/longlink.tar.gz", "d9f6babe107b7247953dff6b5b5ae31a3a880add", 20480},
+		{"./testdata/fatlonglink.tar.gz", "8537f03f89aeef537382f8b0bb065d93e03b0be8", 26234880},
+	}
 
-	fh, err := os.Open("./testdata/t.tar.gz")
+	for _, tc := range testCases {
+		fh, err := os.Open(tc.path)
 		if err != nil {
 			t.Fatal(err)
 		}
@@ -150,11 +156,11 @@ func TestTarStream(t *testing.T) {
 			t.Fatal(err)
 		}
 
-	if i != expectedSize {
-		t.Errorf("size of tar: expected %d; got %d", expectedSize, i)
+		if i != tc.expectedSize {
+			t.Errorf("size of tar: expected %d; got %d", tc.expectedSize, i)
 		}
-	if fmt.Sprintf("%x", h0.Sum(nil)) != expectedSHA1Sum {
-		t.Fatalf("checksum of tar: expected %s; got %x", expectedSHA1Sum, h0.Sum(nil))
+		if fmt.Sprintf("%x", h0.Sum(nil)) != tc.expectedSHA1Sum {
+			t.Fatalf("checksum of tar: expected %s; got %x", tc.expectedSHA1Sum, h0.Sum(nil))
 		}
 
 		t.Logf("%s", w.String()) // if we fail, then show the packed info
@@ -172,78 +178,11 @@ func TestTarStream(t *testing.T) {
 			t.Fatal(err)
 		}
 
-	if i != expectedSize {
-		t.Errorf("size of output tar: expected %d; got %d", expectedSize, i)
+		if i != tc.expectedSize {
+			t.Errorf("size of output tar: expected %d; got %d", tc.expectedSize, i)
 		}
-	if fmt.Sprintf("%x", h1.Sum(nil)) != expectedSHA1Sum {
-		t.Fatalf("checksum of output tar: expected %s; got %x", expectedSHA1Sum, h1.Sum(nil))
+		if fmt.Sprintf("%x", h1.Sum(nil)) != tc.expectedSHA1Sum {
+			t.Fatalf("checksum of output tar: expected %s; got %x", tc.expectedSHA1Sum, h1.Sum(nil))
 		}
 	}
-
-func TestTarGNUTar(t *testing.T) {
-	var (
-		expectedSHA1Sum       = "d9f6babe107b7247953dff6b5b5ae31a3a880add"
-		expectedSize    int64 = 20480
-	)
-
-	fh, err := os.Open("./testdata/longlink.tar.gz")
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer fh.Close()
-	gzRdr, err := gzip.NewReader(fh)
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer gzRdr.Close()
-
-	// Setup where we'll store the metadata
-	w := bytes.NewBuffer([]byte{})
-	sp := storage.NewJSONPacker(w)
-	fgp := storage.NewBufferFileGetPutter()
-
-	// wrap the disassembly stream
-	tarStream, err := NewInputTarStream(gzRdr, sp, fgp)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	// get a sum of the stream after it has passed through to ensure it's the same.
-	h0 := sha1.New()
-	tRdr0 := io.TeeReader(tarStream, h0)
-
-	// read it all to the bit bucket
-	i, err := io.Copy(ioutil.Discard, tRdr0)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if i != expectedSize {
-		t.Errorf("size of tar: expected %d; got %d", expectedSize, i)
-	}
-	if fmt.Sprintf("%x", h0.Sum(nil)) != expectedSHA1Sum {
-		t.Fatalf("checksum of tar: expected %s; got %x", expectedSHA1Sum, h0.Sum(nil))
-	}
-
-	t.Logf("%s", w.String()) // if we fail, then show the packed info
-
-	// If we've made it this far, then we'll turn it around and create a tar
-	// stream from the packed metadata and buffered file contents.
-	r := bytes.NewBuffer(w.Bytes())
-	sup := storage.NewJSONUnpacker(r)
-	// and reuse the fgp that we Put the payloads to.
-
-	rc := NewOutputTarStream(fgp, sup)
-	h1 := sha1.New()
-	i, err = io.Copy(h1, rc)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if i != expectedSize {
-		t.Errorf("size of output tar: expected %d; got %d", expectedSize, i)
-	}
-	if fmt.Sprintf("%x", h1.Sum(nil)) != expectedSHA1Sum {
-		t.Fatalf("checksum of output tar: expected %s; got %x", expectedSHA1Sum, h1.Sum(nil))
-	}
 }