object-cache: use golang bytes.Buffer and bytes.NewReader instead of custom implementation. (#2108)

pkg/objcache/objcache_test.go

@@ -1,95 +0,0 @@
-/*
- * Minio Cloud Storage, (C) 2016 Minio, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package objcache
-
-import (
-	"io"
-	"io/ioutil"
-	"os"
-	"testing"
-)
-
-// Tests different types of seekable operations on an allocated buffer.
-func TestBufferSeek(t *testing.T) {
-	r := NewBuffer([]byte("0123456789"))
-	tests := []struct {
-		off     int64
-		seek    int
-		n       int
-		want    string
-		wantpos int64
-		seekerr string
-	}{
-		{seek: os.SEEK_SET, off: 0, n: 20, want: "0123456789"},
-		{seek: os.SEEK_SET, off: 1, n: 1, want: "1"},
-		{seek: os.SEEK_CUR, off: 1, wantpos: 3, n: 2, want: "34"},
-		{seek: os.SEEK_SET, off: -1, seekerr: "cache.Buffer.Seek: negative position"},
-		{seek: os.SEEK_SET, off: 1 << 33, wantpos: 1 << 33},
-		{seek: os.SEEK_CUR, off: 1, wantpos: 1<<33 + 1},
-		{seek: os.SEEK_SET, n: 5, want: "01234"},
-		{seek: os.SEEK_CUR, n: 5, want: "56789"},
-		{seek: os.SEEK_END, off: -1, seekerr: "cache.Buffer.Seek: whence os.SEEK_END is not supported"},
-	}
-
-	for i, tt := range tests {
-		pos, err := r.Seek(tt.off, tt.seek)
-		if err == nil && tt.seekerr != "" {
-			t.Errorf("%d. want seek error %q", i, tt.seekerr)
-			continue
-		}
-		if err != nil && err.Error() != tt.seekerr {
-			t.Errorf("%d. seek error = %q; want %q", i, err.Error(), tt.seekerr)
-			continue
-		}
-		if tt.wantpos != 0 && tt.wantpos != pos {
-			t.Errorf("%d. pos = %d, want %d", i, pos, tt.wantpos)
-		}
-		buf := make([]byte, tt.n)
-		n, err := r.Read(buf)
-		if err != nil {
-			t.Errorf("%d. read = %v", i, err)
-			continue
-		}
-		got := string(buf[:n])
-		if got != tt.want {
-			t.Errorf("%d. got %q; want %q", i, got, tt.want)
-		}
-	}
-}
-
-// Tests read operation after big seek.
-func TestReadAfterBigSeek(t *testing.T) {
-	r := NewBuffer([]byte("0123456789"))
-	if _, err := r.Seek(1<<31+5, os.SEEK_SET); err != nil {
-		t.Fatal(err)
-	}
-	if n, err := r.Read(make([]byte, 10)); n != 0 || err != io.EOF {
-		t.Errorf("Read = %d, %v; want 0, EOF", n, err)
-	}
-}
-
-// tests that Len is affected by reads, but Size is not.
-func TestBufferLenSize(t *testing.T) {
-	r := NewBuffer([]byte("abc"))
-	io.CopyN(ioutil.Discard, r, 1)
-	if r.Len() != 2 {
-		t.Errorf("Len = %d; want 2", r.Len())
-	}
-	if r.Size() != 3 {
-		t.Errorf("Size = %d; want 3", r.Size())
-	}
-}