diff --git a/test/net/addr/sock.cpp b/test/net/addr/sock.cpp
new file mode 100644
index 0000000..4aee5c5
--- /dev/null
+++ b/test/net/addr/sock.cpp
@@ -0,0 +1,54 @@
+#include <stdplus/net/addr/sock.hpp>
+
+#include <gtest/gtest.h>
+
+namespace stdplus
+{
+
+TEST(Sock4Addr, Basic)
+{
+    constexpr Sock4Addr addr1{.addr = In4Addr{255}, .port = 3959};
+    Sock4Addr addr2{.addr = In4Addr{255}, .port = 2000};
+    Sock4Addr addr3{.addr = In4Addr{0}, .port = 3959};
+
+    EXPECT_EQ(addr1, addr1);
+    EXPECT_NE(addr1, addr2);
+    EXPECT_NE(addr3, addr1);
+
+    auto addr = addr1.sockaddr();
+    EXPECT_EQ(AF_INET, addr.sin_family);
+    EXPECT_EQ(In4Addr{255}, addr.sin_addr);
+    EXPECT_EQ(3959, stdplus::ntoh(addr.sin_port));
+    EXPECT_EQ(sizeof(sockaddr_in), addr1.sockaddrLen());
+}
+
+TEST(Sock6Addr, Basic)
+{
+    constexpr Sock6Addr addr1{.addr = In6Addr{255}, .port = 3959, .scope = 0};
+    Sock6Addr addr2{.addr = In6Addr{255}, .port = 2000, .scope = 0};
+    Sock6Addr addr3{.addr = In6Addr{0}, .port = 3959, .scope = 0};
+    Sock6Addr addr4{.addr = In6Addr{255}, .port = 3959, .scope = 1};
+
+    EXPECT_EQ(addr1, addr1);
+    EXPECT_NE(addr1, addr2);
+    EXPECT_NE(addr3, addr1);
+    EXPECT_NE(addr4, addr1);
+
+    auto addr = addr1.sockaddr();
+    EXPECT_EQ(AF_INET6, addr.sin6_family);
+    EXPECT_EQ(In6Addr{255}, addr.sin6_addr);
+    EXPECT_EQ(3959, stdplus::ntoh(addr.sin6_port));
+    EXPECT_EQ(sizeof(sockaddr_in6), addr1.sockaddrLen());
+}
+
+TEST(SockAnyAddr, Basic)
+{
+    constexpr SockAnyAddr addr1(std::in_place_type<Sock4Addr>, In4Addr{255},
+                                3959);
+    EXPECT_EQ(addr1, addr1);
+    auto buf = addr1.buf();
+    EXPECT_EQ(buf.len, sizeof(sockaddr_in));
+    EXPECT_EQ(addr1.sockaddrLen(), sizeof(sockaddr_in));
+}
+
+} // namespace stdplus