diff --git a/include/sled/uri.h b/include/sled/uri.h
index d5ae9cc..695e740 100644
--- a/include/sled/uri.h
+++ b/include/sled/uri.h
@@ -26,6 +26,9 @@ public:
     // http://xxx.com/index.html
     static URI ParseURIReference(const std::string &uri_str);
 
+    URI() = default;
+    URI(const std::string &uri_str);
+
     // setter getter
     __SLED_URI_GETTER_AND_SETTER(std::string, scheme)
     __SLED_URI_GETTER_AND_SETTER(std::string, username)
diff --git a/src/futures/promise_test.cc b/src/futures/promise_test.cc
index fffe6f1..d4d675b 100644
--- a/src/futures/promise_test.cc
+++ b/src/futures/promise_test.cc
@@ -1,4 +1,5 @@
 #include <gtest/gtest.h>
+#include <sled/futures/promise.h>
 
 TEST(Promise, Basic)
 {
@@ -21,7 +22,7 @@ TEST(Promise, Basic)
 
 TEST(Future, Basic)
 {
-    auto p = sled::Promise<int>();
+    auto p      = sled::Promise<int>();
     auto future = p.GetFuture()
                       .Then([](int v) {
                           EXPECT_EQ(v, 1);
diff --git a/src/uri.cc b/src/uri.cc
index c3449f9..b27b793 100644
--- a/src/uri.cc
+++ b/src/uri.cc
@@ -9,8 +9,10 @@ URI::ParseURI(const std::string &uri_str)
     URI uri;
     // TODO: decode before
     auto start_pos = uri_str.find_first_not_of(" ");
-    auto end_pos = uri_str.find(':');
+    auto end_pos   = uri_str.find(':');
 
     return std::move(uri);
 }
+
+URI::URI(const std::string &uri_str) { *this = ParseURI(uri_str); }
 }// namespace sled
diff --git a/src/uri_test.cc b/src/uri_test.cc
index 7caf8b7..bacd260 100644
--- a/src/uri_test.cc
+++ b/src/uri_test.cc
@@ -1,2 +1,12 @@
 #include <gtest/gtest.h>
 #include <sled/uri.h>
+
+TEST(URI, Absolute)
+{
+    sled::URI uri("http://example.com");
+    EXPECT_EQ(uri.scheme(), "http");
+    EXPECT_EQ(uri.host(), "example.com");
+    EXPECT_EQ(uri.path(), "/");
+    EXPECT_TRUE(uri.query().empty());
+    EXPECT_EQ(uri.anchor(), "");
+}