Terminal: Fix Canvas with 0x0 size

Author: MorganCaron

modules/Terminal/Size.mpp

@@ -27,7 +27,8 @@ export namespace CppUtils::Terminal
 	[[nodiscard]] inline auto getTerminalSize() -> Container::Size2
 	{
 		auto windowsSize = winsize{};
-		ioctl(STDOUT_FILENO, TIOCGWINSZ, std::addressof(windowsSize));
+		if (ioctl(STDOUT_FILENO, TIOCGWINSZ, std::addressof(windowsSize)) == -1)
+			return Container::Size2{0, 0};
 		return Container::Size2{
 			static_cast<std::size_t>(windowsSize.ws_col),
 			static_cast<std::size_t>(windowsSize.ws_row)};

tests/Terminal/Canvas.mpp

@@ -9,6 +9,24 @@ namespace CppUtils::UnitTest::Terminal::Canvas
 		using namespace std::literals;
 		using namespace std::chrono_literals;
 
+		suite.addTest("Canvas with 0x0 size", [&] {
+			auto canvas = CppUtils::Terminal::Canvas{CppUtils::Container::Size2{0, 0}};
+			canvas.fill('.');
+			canvas.print();
+		});
+
+		suite.addTest("Canvas with 0 height", [&] {
+			auto canvas = CppUtils::Terminal::Canvas{CppUtils::Container::Size2{10, 0}};
+			canvas.fill('.');
+			canvas.print();
+		});
+
+		suite.addTest("Canvas with 0 width", [&] {
+			auto canvas = CppUtils::Terminal::Canvas{CppUtils::Container::Size2{0, 10}};
+			canvas.fill('.');
+			canvas.print();
+		});
+
 		suite.addTest("Size", [&] {
 			{
 				auto canvas = CppUtils::Terminal::Canvas{CppUtils::Container::Size2{10, 5}};