keep trailing space at commandline

cmd/micro/util.go

@@ -248,17 +248,20 @@ func SplitCommandArgs(input string) []string {
 		escape = false
 		curArg.WriteRune(r)
 	}
-	if curArg.Len() > 0 || len(result) == 0 {
-		result = append(result, curArg.String())
-	}
+	//if curArg.Len() > 0 || len(result) == 0 {
+	result = append(result, curArg.String())
+	//	}
 	return result
 }
 
 // JoinCommandArgs joins multiple command arguments and quote the strings if needed.
 func JoinCommandArgs(args ...string) string {
 	buf := new(bytes.Buffer)
+	first := true
 	for _, arg := range args {
-		if buf.Len() > 0 {
+		if first {
+			first = false
+		} else {
 			buf.WriteRune(' ')
 		}
 		if !strings.Contains(arg, " ") {

cmd/micro/util_test.go

@@ -79,15 +79,18 @@ func TestJoinAndSplitCommandArgs(t *testing.T) {
 		{[]string{`foo`}, `foo`},
 		{[]string{`foo\"bar`}, `foo\"bar`},
 		{[]string{``}, ``},
+		{[]string{`a`, ``}, `a `},
+		{[]string{``, ``, ``, ``}, `   `},
 	}
 
 	for i, test := range tests {
 		if result := JoinCommandArgs(test.Query...); test.Wanted != result {
-			t.Errorf("JoinCommandArgs failed at Test %d\nGot: %v", i, result)
+			t.Errorf("JoinCommandArgs failed at Test %d\nGot: %q", i, result)
 		}
 
 		if result := SplitCommandArgs(test.Wanted); !reflect.DeepEqual(test.Query, result) {
-			t.Errorf("SplitCommandArgs failed at Test %d\nGot: %v", i, result)
+			t.Errorf("SplitCommandArgs failed at Test %d\nGot: `%s`", i, result)
 		}
 	}
+
 }