diff --git a/TinySTL/Test/StringTest.cpp b/TinySTL/Test/StringTest.cpp
index e69de29..110fbe9 100644
--- a/TinySTL/Test/StringTest.cpp
+++ b/TinySTL/Test/StringTest.cpp
@@ -0,0 +1,55 @@
+#include "StringTest.h"
+
+namespace TinySTL{
+	namespace StringTest{
+
+		void testCase1(){
+			const char *ptr = "hello world";
+
+			stdStr s1(ptr);
+			tsStr s2(ptr);
+			assert(TinySTL::Test::container_equal(s1, s2));
+
+			stdStr s3(ptr, 5);
+			tsStr s4(ptr, 5);
+			assert(TinySTL::Test::container_equal(s3, s4));
+
+			stdStr s5(10, 'z');
+			tsStr s6(10, 'z');
+			assert(TinySTL::Test::container_equal(s5, s6));
+
+			char arr[] = "zouxiaohang love cpp";
+			stdStr s7(std::begin(arr), std::end(arr));
+			tsStr s8(std::begin(arr), std::end(arr));
+			assert(TinySTL::Test::container_equal(s7, s8));
+		}
+		void testCase2(){
+			stdStr temp1("hello, world");
+			tsStr temp2("hello, world");
+
+			stdStr s1(temp1);
+			tsStr s2(temp2);
+			assert(TinySTL::Test::container_equal(s1, s2));
+
+			stdStr s3(std::move(s1));
+			tsStr s4(std::move(s2));
+			assert(TinySTL::Test::container_equal(s3, s4));
+
+			stdStr s5(temp1, 1);
+			tsStr s6(temp2, 1);
+			assert(TinySTL::Test::container_equal(s5, s6));
+
+			stdStr s7(temp1, 0, 5);
+			tsStr s8(temp2, 0, 5);
+			assert(TinySTL::Test::container_equal(s7, s8));
+		}
+	}
+}
+
+using namespace TinySTL::StringTest;
+int main(){
+	testCase1();
+	testCase2();
+	system("pause");
+	return 0;
+}
\ No newline at end of file
diff --git a/TinySTL/Test/StringTest.h b/TinySTL/Test/StringTest.h
index e69de29..5cf5e58 100644
--- a/TinySTL/Test/StringTest.h
+++ b/TinySTL/Test/StringTest.h
@@ -0,0 +1,19 @@
+#ifndef _STRING_TEST_H_
+#define _STRING_TEST_H_
+
+#include "TestUtil.h"
+
+#include "../String.h"
+#include <string>
+
+#include <cassert>
+#include <iterator>
+
+namespace TinySTL{
+	namespace StringTest{
+		using stdStr = std::string;
+		using tsStr = TinySTL::string;
+	}
+}
+
+#endif
\ No newline at end of file