Add tests for the input component.

CMakeLists.txt

@@ -215,9 +215,10 @@ if (FTXUI_BUILD_TESTS AND ${CMAKE_VERSION} VERSION_GREATER "3.11.4")
 
   add_executable(tests
     src/ftxui/component/container_test.cpp
-    src/ftxui/component/terminal_input_parser_test.cpp
+    src/ftxui/component/input_test.cpp
     src/ftxui/component/radiobox_test.cpp
     src/ftxui/component/receiver_test.cpp
+    src/ftxui/component/terminal_input_parser_test.cpp
     src/ftxui/component/toggle_test.cpp
     src/ftxui/dom/gauge_test.cpp
     src/ftxui/dom/hbox_test.cpp

src/ftxui/component/input_test.cpp

@@ -0,0 +1,158 @@
+#include "ftxui/component/input.hpp"
+
+#include "gtest/gtest.h"
+
+using namespace ftxui;
+
+TEST(InputTest, Init) {
+  Input input;
+
+  EXPECT_EQ(input.content, L"");
+  EXPECT_EQ(input.placeholder, L"");
+  EXPECT_EQ(input.cursor_position, 0);
+}
+
+TEST(InputTest, Type) {
+  Input input;
+
+  input.OnEvent(Event::Character('a'));
+  EXPECT_EQ(input.content, L"a");
+  EXPECT_EQ(input.cursor_position, 1u);
+
+  input.OnEvent(Event::Character('b'));
+  EXPECT_EQ(input.content, L"ab");
+  EXPECT_EQ(input.cursor_position, 2u);
+}
+
+TEST(InputTest, Arrow) {
+  Input input;
+
+  input.OnEvent(Event::Character('a'));
+  input.OnEvent(Event::Character('b'));
+  input.OnEvent(Event::Character('c'));
+
+  EXPECT_EQ(input.cursor_position, 3u);
+
+  input.OnEvent(Event::ArrowLeft);
+  EXPECT_EQ(input.cursor_position, 2u);
+
+  input.OnEvent(Event::ArrowLeft);
+  EXPECT_EQ(input.cursor_position, 1u);
+
+  input.OnEvent(Event::ArrowLeft);
+  EXPECT_EQ(input.cursor_position, 0u);
+
+  input.OnEvent(Event::ArrowLeft);
+  EXPECT_EQ(input.cursor_position, 0u);
+
+  input.OnEvent(Event::ArrowRight);
+  EXPECT_EQ(input.cursor_position, 1u);
+
+  input.OnEvent(Event::ArrowRight);
+  EXPECT_EQ(input.cursor_position, 2u);
+
+  input.OnEvent(Event::ArrowRight);
+  EXPECT_EQ(input.cursor_position, 3u);
+
+  input.OnEvent(Event::ArrowRight);
+  EXPECT_EQ(input.cursor_position, 3u);
+}
+
+TEST(InputTest, Insert) {
+  Input input;
+
+  input.OnEvent(Event::Character('a'));
+  input.OnEvent(Event::Character('b'));
+  input.OnEvent(Event::Character('c'));
+  EXPECT_EQ(input.content, L"abc");
+
+  input.OnEvent(Event::ArrowLeft);
+  input.OnEvent(Event::ArrowLeft);
+  input.OnEvent(Event::Character('-'));
+  EXPECT_EQ(input.content, L"a-bc");
+
+  input.OnEvent(Event::ArrowLeft);
+  input.OnEvent(Event::Character('-'));
+  EXPECT_EQ(input.content, L"a--bc");
+
+  input.OnEvent(Event::ArrowLeft);
+  input.OnEvent(Event::ArrowLeft);
+  input.OnEvent(Event::ArrowLeft);
+  input.OnEvent(Event::Character('-'));
+  EXPECT_EQ(input.content, L"-a--bc");
+}
+
+TEST(InputTest, Home) {
+  Input input;
+
+  input.OnEvent(Event::Character('a'));
+  input.OnEvent(Event::Character('b'));
+  input.OnEvent(Event::Character('c'));
+  EXPECT_EQ(input.content, L"abc");
+
+  EXPECT_EQ(input.cursor_position, 3u);
+  input.OnEvent(Event::Home);
+  EXPECT_EQ(input.cursor_position, 0u);
+
+  input.OnEvent(Event::Character('-'));
+  EXPECT_EQ(input.content, L"-abc");
+}
+
+TEST(InputTest, End) {
+  Input input;
+
+  input.OnEvent(Event::Character('a'));
+  input.OnEvent(Event::Character('b'));
+  input.OnEvent(Event::Character('c'));
+
+  input.OnEvent(Event::ArrowLeft);
+  input.OnEvent(Event::ArrowLeft);
+
+  EXPECT_EQ(input.cursor_position, 1u);
+  input.OnEvent(Event::End);
+  EXPECT_EQ(input.cursor_position, 3u);
+}
+
+TEST(InputTest, Delete) {
+  Input input;
+
+  input.OnEvent(Event::Character('a'));
+  input.OnEvent(Event::Character('b'));
+  input.OnEvent(Event::Character('c'));
+  input.OnEvent(Event::ArrowLeft);
+
+  EXPECT_EQ(input.content, L"abc");
+  EXPECT_EQ(input.cursor_position, 2u);
+
+  input.OnEvent(Event::Delete);
+  EXPECT_EQ(input.content, L"ab");
+  EXPECT_EQ(input.cursor_position, 2u);
+
+  input.OnEvent(Event::Delete);
+  EXPECT_EQ(input.content, L"ab");
+  EXPECT_EQ(input.cursor_position, 2u);
+}
+
+TEST(InputTest, Backspace) {
+  Input input;
+
+  input.OnEvent(Event::Character('a'));
+  input.OnEvent(Event::Character('b'));
+  input.OnEvent(Event::Character('c'));
+  input.OnEvent(Event::ArrowLeft);
+
+  EXPECT_EQ(input.content, L"abc");
+  EXPECT_EQ(input.cursor_position, 2u);
+
+  input.OnEvent(Event::Backspace);
+  EXPECT_EQ(input.content, L"ac");
+  EXPECT_EQ(input.cursor_position, 1u);
+
+  input.OnEvent(Event::Backspace);
+  EXPECT_EQ(input.content, L"c");
+  EXPECT_EQ(input.cursor_position, 0u);
+
+  input.OnEvent(Event::Backspace);
+  EXPECT_EQ(input.content, L"c");
+  EXPECT_EQ(input.cursor_position, 0u);
+}