Add overall test

Author: jonjohnsonjr

tarfs/tarfs.go

@@ -17,6 +17,7 @@ package tarfs
 import (
 	"archive/tar"
 	"bufio"
+	"bytes"
 	"cmp"
 	"encoding/json"
 	"errors"
@@ -156,6 +157,7 @@ func (fsys *FS) Open(name string) (fs.File, error) {
 				fi: root{},
 			},
 			fsys: fsys,
+			sr:   io.NewSectionReader(bytes.NewReader(nil), 0, 0),
 		}, nil
 	}
 

tarfs/testdata/gsip.tar.gz

@@ -0,0 +1,89 @@
+package main
+
+import (
+	"bytes"
+	"context"
+	"io"
+	"io/fs"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"testing"
+
+	"github.com/jonjohnsonjr/targz/gsip"
+	"github.com/jonjohnsonjr/targz/ranger"
+	"github.com/jonjohnsonjr/targz/tarfs"
+)
+
+func TestTargz(t *testing.T) {
+	f, err := os.Open("./tarfs/testdata/gsip.tar")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer f.Close()
+
+	info, err := f.Stat()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	size := info.Size()
+
+	s := httptest.NewServer(http.FileServerFS(os.DirFS("./tarfs/testdata")))
+	defer s.Close()
+
+	uri := s.URL + "/gsip.tar.gz"
+
+	t.Logf("uri: %q", uri)
+
+	ra := ranger.New(context.Background(), uri, s.Client().Transport)
+
+	zr, err := gsip.NewReader(ra, size)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	hfs, err := tarfs.New(zr, size)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ffs, err := tarfs.New(f, size)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if err := fs.WalkDir(ffs, ".", func(p string, _ fs.DirEntry, err error) error {
+		if err != nil {
+			return err
+		}
+
+		want, err := ffs.Open(p)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		got, err := hfs.Open(p)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		b1, err := io.ReadAll(want)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		b2, err := io.ReadAll(got)
+		if err != nil {
+			t.Fatal(err)
+		}
+
+		if !bytes.Equal(b1, b2) {
+			t.Errorf("mismatched contents: %q", p)
+		}
+
+		return nil
+	}); err != nil {
+		t.Fatal(err)
+	}
+}