1 files changed, 64 insertions, 2 deletions

diff --git a/ttwhy/scanners/terminal_scanner.tests.cpp b/ttwhy/scanners/terminal_scanner.tests.cpp
index 6fdc8af..f4ea6ad 100644
--- a/ttwhy/scanners/terminal_scanner.tests.cpp
+++ b/ttwhy/scanners/terminal_scanner.tests.cpp
@@ -1,6 +1,6 @@
 #include <catch2/catch_test_macros.hpp>
 
-#include <string_view>  // IWYU pragma: keep
+#include <string_view>
 #include <variant>
 #include <vector>
 
@@ -14,6 +14,13 @@ using namespace std::string_view_literals;
   return data != nullptr && data->value == expected;
 }
 
+[[nodiscard]] constexpr auto static is_control(ttwhy::scanners::input_event & event,
+                                               ttwhy::scanners::control_key expected) -> bool
+{
+  auto const * data = std::get_if<ttwhy::scanners::control_event>(&event);
+  return data != nullptr && data->key == expected;
+}
+
 SCENARIO("The ANSI scanner processes printable ASCII and standard C0 control characters", "[scanner][ansi]")
 {
   GIVEN("An initialized scanner and event sink")
@@ -26,7 +33,7 @@ SCENARIO("The ANSI scanner processes printable ASCII and standard C0 control cha
 
     WHEN("Processing a standard printable character")
     {
-      scanner.process("A");
+      scanner.process("A"sv);
 
       THEN("It yields a single character event")
       {
@@ -34,5 +41,60 @@ SCENARIO("The ANSI scanner processes printable ASCII and standard C0 control cha
         CHECK(is_character(queue.at(0), 'A'));
       }
     }
+
+    WHEN("Processing a BS byte (\\x08)")
+    {
+      scanner.process("\x08"sv);
+
+      THEN("It yields a backspace control event")
+      {
+        REQUIRE(queue.size() == 1);
+        CHECK(is_control(queue.at(0), ttwhy::scanners::control_key::backspace));
+      }
+    }
+
+    WHEN("Processing a DEL byte (\\x7f as BS)")
+    {
+      scanner.process("\x7f"sv);
+
+      THEN("It yields a backspace control event")
+      {
+        REQUIRE(queue.size() == 1);
+        CHECK(is_control(queue.at(0), ttwhy::scanners::control_key::backspace));
+      }
+    }
+
+    WHEN("Processing a TAB byte")
+    {
+      scanner.process("\x09"sv);
+
+      THEN("It yields a tab control event")
+      {
+        REQUIRE(queue.size() == 1);
+        CHECK(is_control(queue.at(0), ttwhy::scanners::control_key::tab));
+      }
+    }
+
+    WHEN("Processing an LF byte")
+    {
+      scanner.process("\x0a"sv);
+
+      THEN("It yields an enter control event")
+      {
+        REQUIRE(queue.size() == 1);
+        CHECK(is_control(queue.at(0), ttwhy::scanners::control_key::enter));
+      }
+    }
+
+    WHEN("Processing an CR byte")
+    {
+      scanner.process("\x0d"sv);
+
+      THEN("It yields an enter control event")
+      {
+        REQUIRE(queue.size() == 1);
+        CHECK(is_control(queue.at(0), ttwhy::scanners::control_key::enter));
+      }
+    }
   }
 }