add tests

Author: Katze719

CMakeLists.txt

@@ -65,3 +65,17 @@ set_target_properties(${PROJECT_N} PROPERTIES
                             SOVERSION ${PROJECT_VERSION_MAJOR})
 
 target_include_directories(${PROJECT_N} PUBLIC ${PROJECT_SOURCE_DIR}/src)
+
+add_executable(serial_tests tests/serial_test.cpp)
+target_link_libraries(serial_tests PRIVATE ${PROJECT_N})
+
+target_include_directories(serial_tests PRIVATE ${PROJECT_SOURCE_DIR}/src)
+
+add_custom_command(TARGET serial_tests POST_BUILD
+    COMMAND ${CMAKE_COMMAND} -E copy_if_different
+            $<TARGET_FILE:${PROJECT_N}>
+            $<TARGET_FILE_DIR:serial_tests>
+    COMMENT "Copy shared library next to test binary")
+
+enable_testing()
+add_test(NAME SerialEchoTest COMMAND serial_tests /dev/ttyACM0)

src/serial.cpp

@@ -12,6 +12,13 @@
 #include <unistd.h>
 #include <utility>
 
+// -----------------------------------------------------------------------------
+// Global callback function pointers (default nullptr)
+// -----------------------------------------------------------------------------
+void (*errorCallback)(int) = nullptr;
+void (*readCallback)(int) = nullptr;
+void (*writeCallback)(int) = nullptr;
+
 // -----------------------------------------------------------------------------
 // Internal helpers & types
 // -----------------------------------------------------------------------------

tests/serial_test.cpp

@@ -0,0 +1,74 @@
+// Simple integration test for CPP-Unix-Bindings
+// ------------------------------------------------
+// This executable opens the given serial port, sends a test
+// string and verifies that the same string is echoed back
+// by the micro-controller.
+//
+// ------------------------------------------------
+// Arduino sketch to flash for the tests
+// ------------------------------------------------
+/*
+  // --- BEGIN ARDUINO CODE ---
+  void setup() {
+      Serial.begin(115200);
+      // Wait until the host opens the port (optional but handy)
+      while (!Serial) {
+          ;
+      }
+  }
+
+  void loop() {
+      if (Serial.available()) {
+          char c = Serial.read();
+          Serial.write(c);          // echo back
+      }
+  }
+  // --- END ARDUINO CODE ---
+*/
+// ------------------------------------------------
+
+#include "serial.h"
+#include <cassert>
+#include <cstring>
+#include <iostream>
+#include <string>
+
+int main(int argc, char *argv[]) {
+  const char *port = argc > 1 ? argv[1] : "/dev/ttyACM0"; // default path
+  const std::string testMsg = "HELLO";
+
+  intptr_t handle = serialOpen((void *)port, 115200, 8, 0, 0);
+  if (!handle) {
+    std::cerr << "Failed to open port " << port << "\n";
+    return 1;
+  }
+
+  // Send message
+  int written =
+      serialWrite(handle, (void *)testMsg.c_str(), testMsg.size(), 100, 1);
+  if (written != static_cast<int>(testMsg.size())) {
+    std::cerr << "Write failed\n";
+    serialClose(handle);
+    return 2;
+  }
+
+  // Read echo
+  char buffer[16] = {0};
+  int readBytes = serialRead(handle, buffer, testMsg.size(), 500, 1);
+  if (readBytes != static_cast<int>(testMsg.size())) {
+    std::cerr << "Read failed (got " << readBytes << ")\n";
+    serialClose(handle);
+    return 3;
+  }
+
+  if (std::strncmp(buffer, testMsg.c_str(), testMsg.size()) != 0) {
+    std::cerr << "Data mismatch: expected " << testMsg << ", got " << buffer
+              << "\n";
+    serialClose(handle);
+    return 4;
+  }
+
+  std::cout << "Serial echo test passed on port " << port << "\n";
+  serialClose(handle);
+  return 0;
+}