update vendor

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

@@ -0,0 +1,54 @@
+package bytes
+
+import (
+	"strings"
+	"testing"
+)
+
+type replaceCase struct {
+	s    string
+	src  string
+	dest string
+	n    int
+}
+
+func stringReplace(b string, src, dest string, n int) string {
+
+	return string(Replace([]byte(b), []byte(src), []byte(dest), n))
+}
+
+func TestReplace(t *testing.T) {
+
+	cases := []replaceCase{
+		{"hello, world!", "world", "xsw", -1},
+		{"hello, world world world", "world", "xsw", 1},
+		{"hello, world world world", "world", "xsw", 2},
+		{"hello, world world world", "world", "xsw", -1},
+		{"hello, xsw!", "xsw", "world", -1},
+		{"hello, xsw xsw xsw", "xsw", "world", 1},
+		{"hello, xsw xsw xsw", "xsw", "world", 2},
+		{"hello, xsw xsw xsw", "xsw", "world", -1},
+	}
+
+	for _, c := range cases {
+		ret := stringReplace(c.s, c.src, c.dest, c.n)
+		expected := strings.Replace(c.s, c.src, c.dest, c.n)
+		if ret != expected {
+			t.Fatal("Replace failed:", c, "ret:", ret, "expected:", expected)
+		}
+	}
+}
+
+func stringInsertAt(b string, off int, text string) string {
+
+	return string(ReplaceAt([]byte(b), off, 0, []byte(text)))
+}
+
+func TestInsertAt(t *testing.T) {
+
+	ret := stringInsertAt("helloworld", 5, ", ")
+	if ret != "hello, world" {
+		t.Fatal("InsertAt failed:", ret)
+	}
+}
+