update vendor

vendor/github.com/qiniu/x/bytes.v7/bytes_test.go

@@ -0,0 +1,60 @@
+package bytes
+
+import (
+	"io"
+	"testing"
+)
+
+// ---------------------------------------------------
+
+func TestBuffer(t *testing.T) {
+
+	b := NewBuffer()
+	n, err := b.WriteStringAt("Hello", 4)
+	if n != 5 || err != nil {
+		t.Fatal("WriteStringAt failed:", n, err)
+	}
+	if b.Len() != 9 {
+		t.Fatal("Buffer.Len invalid (9 is required):", b.Len())
+	}
+
+	buf := make([]byte, 10)
+	n, err = b.ReadAt(buf, 50)
+	if n != 0 || err != io.EOF {
+		t.Fatal("ReadAt failed:", n, err)
+	}
+
+	n, err = b.ReadAt(buf, 6)
+	if n != 3 || err != io.EOF || string(buf[:n]) != "llo" {
+		t.Fatal("ReadAt failed:", n, err, string(buf[:n]))
+	}
+
+	n, err = b.WriteAt([]byte("Hi h"), 1)
+	if n != 4 || err != nil {
+		t.Fatal("WriteAt failed:", n, err)
+	}
+	if b.Len() != 9 {
+		t.Fatal("Buffer.Len invalid (9 is required):", b.Len())
+	}
+
+	n, err = b.ReadAt(buf, 0)
+	if n != 9 || err != io.EOF || string(buf[:n]) != "\x00Hi hello" {
+		t.Fatal("ReadAt failed:", n, err)
+	}
+
+	n, err = b.WriteStringAt("LO world!", 7)
+	if n != 9 || err != nil {
+		t.Fatal("WriteStringAt failed:", n, err)
+	}
+	if b.Len() != 16 {
+		t.Fatal("Buffer.Len invalid (16 is required):", b.Len())
+	}
+
+	buf = make([]byte, 17)
+	n, err = b.ReadAt(buf, 0)
+	if n != 16 || err != io.EOF || string(buf[:n]) != "\x00Hi helLO world!" {
+		t.Fatal("ReadAt failed:", n, err, string(buf[:n]))
+	}
+}
+
+// ---------------------------------------------------