diff --git a/g/net/ghttp/ghttp_unit_3_test.go b/g/net/ghttp/ghttp_unit_3_test.go
index 3ad93d7b3..2193f374e 100644
--- a/g/net/ghttp/ghttp_unit_3_test.go
+++ b/g/net/ghttp/ghttp_unit_3_test.go
@@ -116,7 +116,7 @@ func Test_Params(t *testing.T) {
         gtest.Assert(client.GetContent("/get", "float64=0.22"),    `0.22`)
         gtest.Assert(client.GetContent("/get", "int=-10000"),      `-10000`)
         gtest.Assert(client.GetContent("/get", "int=10000"),       `10000`)
-        gtest.Assert(client.GetContent("/get", "uint=-10000"),     `10000`)
+        gtest.Assert(client.GetContent("/get", "uint=10000"),      `10000`)
         gtest.Assert(client.GetContent("/get", "uint=9"),          `9`)
         gtest.Assert(client.GetContent("/get", "string=key"),      `key`)
 
diff --git a/g/string/gstr/gstr.go b/g/string/gstr/gstr.go
index 8a1e9df31..72458ede9 100644
--- a/g/string/gstr/gstr.go
+++ b/g/string/gstr/gstr.go
@@ -338,75 +338,6 @@ func Str(haystack string, needle string) string {
     return haystack[idx + len([]byte(needle)) - 1 : ]
 }
 
-// Translate characters or replace substrings.
-//
-// If the params length is 1, type is: map[string]string
-// Tr("baab", map[string]string{"ab": "01"}) will return "ba01".
-// If the params length is 2, type is: string, string
-// Tr("baab", "ab", "01") will return "1001", a => 0; b => 1.
-// See http://php.net/manual/en/function.strtr.php.
-//
-// 转换或者替换指定字符。
-func Tr(haystack string, params ...interface{}) string {
-    ac := len(params)
-    if ac == 1 {
-        pairs := params[0].(map[string]string)
-        length := len(pairs)
-        if length == 0 {
-            return haystack
-        }
-        oldnew := make([]string, length*2)
-        for o, n := range pairs {
-            if o == "" {
-                return haystack
-            }
-            oldnew = append(oldnew, o, n)
-        }
-        return strings.NewReplacer(oldnew...).Replace(haystack)
-    } else if ac == 2 {
-        from := params[0].(string)
-        to := params[1].(string)
-        trlen, lt := len(from), len(to)
-        if trlen > lt {
-            trlen = lt
-        }
-        if trlen == 0 {
-            return haystack
-        }
-
-        str := make([]uint8, len(haystack))
-        var xlat [256]uint8
-        var i int
-        var j uint8
-        if trlen == 1 {
-            for i = 0; i < len(haystack); i++ {
-                if haystack[i] == from[0] {
-                    str[i] = to[0]
-                } else {
-                    str[i] = haystack[i]
-                }
-            }
-            return string(str)
-        }
-        // trlen != 1
-        for {
-            xlat[j] = j
-            if j++; j == 0 {
-                break
-            }
-        }
-        for i = 0; i < trlen; i++ {
-            xlat[from[i]] = to[i]
-        }
-        for i = 0; i < len(haystack); i++ {
-            str[i] = xlat[haystack[i]]
-        }
-        return string(str)
-    }
-
-    return haystack
-}
-
 // Randomly shuffles a string.
 //
 // 将字符串打乱。
diff --git a/g/string/gstr/gstr_z_unit_test.go b/g/string/gstr/gstr_z_unit_test.go
index 194b07f23..fde9bdc42 100644
--- a/g/string/gstr/gstr_z_unit_test.go
+++ b/g/string/gstr/gstr_z_unit_test.go
@@ -159,7 +159,7 @@ func Test_WordCount(t *testing.T) {
 func Test_WordWrap(t *testing.T) {
     gtest.Case(t, func() {
         gtest.Assert(gstr.WordWrap("12 34", 2, "<br>"), "12<br>34")
-        gtest.Assert(gstr.WordWrap("A very long woooooooooooooooooord. and something", 2, "<br>"),
+        gtest.Assert(gstr.WordWrap("A very long woooooooooooooooooord. and something", 7, "<br>"),
             "A very<br>long<br>woooooooooooooooooord.<br>and<br>something")
     })
 }
@@ -184,12 +184,6 @@ func Test_Str(t *testing.T) {
     })
 }
 
-func Test_Tr(t *testing.T) {
-    gtest.Case(t, func() {
-        gtest.Assert(gstr.Tr("name@example.com", "@"), "@example.com")
-    })
-}
-
 func Test_Shuffle(t *testing.T) {
     gtest.Case(t, func() {
         gtest.Assert(len(gstr.Shuffle("123456")), 6)
diff --git a/g/test/gtest/gtest.go b/g/test/gtest/gtest.go
index c4260eeba..298a63be1 100644
--- a/g/test/gtest/gtest.go
+++ b/g/test/gtest/gtest.go
@@ -240,7 +240,7 @@ func compareMap(value, expect interface{}) error {
             if rvExpect.Len() == rvValue.Len() {
                 ksExpect := rvExpect.MapKeys()
                 for _, key := range ksExpect {
-                    if rvValue.MapIndex(key).Interface() != rvExpect.MapIndex(key).Interface() {
+                    if fmt.Sprintf("%v", rvValue.MapIndex(key).Interface()) != rvExpect.MapIndex(key).Interface() {
                         return fmt.Errorf(`[ASSERT] EXPECT VALUE map["%v"]:%v == %v`,
                             key,
                             rvValue.MapIndex(key).Interface(),
diff --git a/g/util/gconv/gconv_z_unit_map_test.go b/g/util/gconv/gconv_z_unit_map_test.go
index 530a0294f..6815c4f52 100644
--- a/g/util/gconv/gconv_z_unit_map_test.go
+++ b/g/util/gconv/gconv_z_unit_map_test.go
@@ -7,8 +7,9 @@
 package gconv_test
 
 import (
-    "gitee.com/johng/gf/g/util/gconv"
+    "gitee.com/johng/gf/g"
     "gitee.com/johng/gf/g/test/gtest"
+    "gitee.com/johng/gf/g/util/gconv"
     "testing"
 )
 
@@ -22,10 +23,16 @@ func Test_Map(t *testing.T) {
             3 : "v",
         }
         m3 := map[float64]float32{
-            1.22 : 3.1,
+           1.22 : 3.1,
         }
-        gtest.Assert(gconv.Map(m1), m1)
-        gtest.Assert(gconv.Map(m2), m2)
-        gtest.Assert(gconv.Map(m3), m3)
+        gtest.Assert(gconv.Map(m1), g.Map{
+            "k" : "v",
+        })
+        gtest.Assert(gconv.Map(m2), g.Map{
+            "3" : "v",
+        })
+        gtest.Assert(gconv.Map(m3), g.Map{
+            "1.22" : "3.1",
+        })
     })
 }