Add sprintf test

velconia · velconia · commit 0f03cbbde722 · 2018-07-03T14:11:40.000+08:00
diff --git a/paddle/fluid/string/printf_test.cc b/paddle/fluid/string/printf_test.cc
@@ -27,4 +27,5 @@ TEST(StringPrintf, StringPrintf) {
   EXPECT_EQ(std::string("Wednesday, July 27, 14:44"),
             paddle::string::Sprintf("%s, %s %d, %.2d:%.2d", weekday, month, day,
                                     hour, min));
+  EXPECT_EQ(std::string(""), paddle::string::Sprintf());
 }

Original file line number	Diff line number	Diff line change
`@@ -27,4 +27,5 @@ TEST(StringPrintf, StringPrintf) {`
`27`	`27`	`EXPECT_EQ(std::string("Wednesday, July 27, 14:44"),`
`28`	`28`	`paddle::string::Sprintf("%s, %s %d, %.2d:%.2d", weekday, month, day,`
`29`	`29`	`hour, min));`
	`30`	`+ EXPECT_EQ(std::string(""), paddle::string::Sprintf());`
`30`	`31`	`}`