diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4ad42a2..851bcfc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -157,6 +157,7 @@ if (FTXUI_BUILD_TESTS AND GTEST_FOUND AND THREADS_FOUND)
   add_executable(tests
     src/ftxui/component/toggle_test.cpp
     src/ftxui/component/radiobox_test.cpp
+    src/ftxui/component/container_test.cpp
     src/ftxui/dom/gauge_test.cpp
     src/ftxui/dom/hbox_test.cpp
     src/ftxui/dom/text_test.cpp
diff --git a/src/ftxui/component/container_test.cpp b/src/ftxui/component/container_test.cpp
new file mode 100644
index 0000000..bcab985
--- /dev/null
+++ b/src/ftxui/component/container_test.cpp
@@ -0,0 +1,76 @@
+#include "ftxui/component/container.hpp"
+
+#include "gtest/gtest.h"
+
+using namespace ftxui;
+
+TEST(ContainerTest, HorizontalEvent) {
+  auto container = Container::Horizontal();
+  Component c0, c1, c2;
+  container.Add(&c0);
+  container.Add(&c1);
+  container.Add(&c2);
+
+  // With arrow key.
+  EXPECT_EQ(container.ActiveChild(), &c0);
+  container.OnEvent(Event::ArrowRight);
+  EXPECT_EQ(container.ActiveChild(), &c1);
+  container.OnEvent(Event::ArrowRight);
+  EXPECT_EQ(container.ActiveChild(), &c2);
+  container.OnEvent(Event::ArrowRight);
+  EXPECT_EQ(container.ActiveChild(), &c2);
+  container.OnEvent(Event::ArrowLeft);
+  EXPECT_EQ(container.ActiveChild(), &c1);
+  container.OnEvent(Event::ArrowLeft);
+  EXPECT_EQ(container.ActiveChild(), &c0);
+  container.OnEvent(Event::ArrowLeft);
+  EXPECT_EQ(container.ActiveChild(), &c0);
+
+  // With arrow key in the wrong dimension.
+  container.OnEvent(Event::ArrowUp);
+  EXPECT_EQ(container.ActiveChild(), &c0);
+  container.OnEvent(Event::ArrowDown);
+  EXPECT_EQ(container.ActiveChild(), &c0);
+
+  // With vim like characters.
+  EXPECT_EQ(container.ActiveChild(), &c0);
+  container.OnEvent(Event::Character('l'));
+  EXPECT_EQ(container.ActiveChild(), &c1);
+  container.OnEvent(Event::Character('l'));
+  EXPECT_EQ(container.ActiveChild(), &c2);
+  container.OnEvent(Event::Character('l'));
+  EXPECT_EQ(container.ActiveChild(), &c2);
+  container.OnEvent(Event::Character('h'));
+  EXPECT_EQ(container.ActiveChild(), &c1);
+  container.OnEvent(Event::Character('h'));
+  EXPECT_EQ(container.ActiveChild(), &c0);
+  container.OnEvent(Event::Character('h'));
+  EXPECT_EQ(container.ActiveChild(), &c0);
+
+  // With vim like characters in the wrong direction.
+  container.OnEvent(Event::Character('j'));
+  EXPECT_EQ(container.ActiveChild(), &c0);
+  container.OnEvent(Event::Character('k'));
+  EXPECT_EQ(container.ActiveChild(), &c0);
+
+  // With tab characters.
+  container.OnEvent(Event::Tab);
+  EXPECT_EQ(container.ActiveChild(), &c1);
+  container.OnEvent(Event::Tab);
+  EXPECT_EQ(container.ActiveChild(), &c2);
+  container.OnEvent(Event::Tab);
+  EXPECT_EQ(container.ActiveChild(), &c0);
+  container.OnEvent(Event::Tab);
+  EXPECT_EQ(container.ActiveChild(), &c1);
+  container.OnEvent(Event::Tab);
+  EXPECT_EQ(container.ActiveChild(), &c2);
+  container.OnEvent(Event::TabReverse);
+  EXPECT_EQ(container.ActiveChild(), &c1);
+  container.OnEvent(Event::TabReverse);
+  EXPECT_EQ(container.ActiveChild(), &c0);
+  container.OnEvent(Event::TabReverse);
+  EXPECT_EQ(container.ActiveChild(), &c2);
+  container.OnEvent(Event::TabReverse);
+  EXPECT_EQ(container.ActiveChild(), &c1);
+  container.OnEvent(Event::TabReverse);
+}
diff --git a/src/ftxui/component/toggle_test.cpp b/src/ftxui/component/toggle_test.cpp
index 090e5e0..e2a5aca 100644
--- a/src/ftxui/component/toggle_test.cpp
+++ b/src/ftxui/component/toggle_test.cpp
@@ -2,7 +2,6 @@
 
 #include "gtest/gtest.h"
 
-using namespace ftxui;
 using namespace ftxui;
 
 TEST(ToggleTest, leftRightArrow) {