Provide more information when the native program crashed on a host (errored with a negative return code) // Resolve #3429

HISTORY.rst

@@ -40,6 +40,10 @@ Please check `Migration guide from 5.x to 6.0 <https://docs.platformio.org/en/la
   - Dropped support for the "pythonPackages" field in "platform.json" manifest in favor of `Extra Python Dependencies <https://docs.platformio.org/en/latest/scripting/examples/extra_python_packages.html>`__
   - Fixed an issue when manually removed dependencies from the `"platformio.ini" <https://docs.platformio.org/en/latest/projectconf.html>`__ configuration file were not uninstalled from the storage (`issue #3076 <https://github.com/platformio/platformio-core/issues/3076>`_)
 
+* **Unit Testing**
+
+  - Provide more information when the native program crashed on a host (errored with a negative return code) (`issue #3429 <https://github.com/platformio/platformio-core/issues/3429>`_)
+
 * **Static Code Analysis**
 
   - Added support for the custom `Clang-Tidy <https://docs.platformio.org/en/latest/plus/check-tools/clang-tidy.html>`__ configuration file (`issue #4186 <https://github.com/platformio/platformio-core/issues/4186>`_)

platformio/unittest/runners/mixins/native.py

@@ -13,8 +13,10 @@
 # limitations under the License.
 
 import os
+import signal
 
 from platformio import proc
+from platformio.unittest.exception import UnitTestError
 
 
 class TestRunnerNativeMixin:
@@ -25,5 +27,16 @@ class TestRunnerNativeMixin:
             stdout=proc.LineBufferedAsyncPipe(self.on_run_output),
             stderr=proc.LineBufferedAsyncPipe(self.on_run_output),
         )
-        assert "returncode" in result
+        if result["returncode"] == 0:
-        return result["returncode"] == 0
+            return True
+        try:
+            sig = signal.Signals(abs(result["returncode"]))
+            try:
+                signal_description = signal.strsignal(sig)
+            except AttributeError:
+                signal_description = ""
+            raise UnitTestError(
+                f"Program received signal {sig.name} ({signal_description})"
+            )
+        except ValueError:
+            raise UnitTestError("Program errored with %d code" % result["returncode"])

tests/commands/test_test.py

@@ -71,27 +71,54 @@ int main() {
         unittest_cmd,
         ["-d", str(project_dir), "-e", "native"],
     )
-
-    test_dir.join("unittest_transport.h").write(
-        """
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-void unittest_uart_begin(){}
-void unittest_uart_putchar(char c){}
-void unittest_uart_flush(){}
-void unittest_uart_end(){}
-
-#ifdef __cplusplus
-}
-#endif
-"""
-    )
     validate_cliresult(result)
     assert all(f in result.output for f in ("setUp called", "tearDown called"))
 
 
+def test_crashed_program(clirunner, tmpdir):
+    project_dir = tmpdir.mkdir("project")
+    project_dir.join("platformio.ini").write(
+        """
+[env:native]
+platform = native
+"""
+    )
+    test_dir = project_dir.mkdir("test")
+    test_dir.join("test_main.c").write(
+        """
+#include <stdio.h>
+#include <unity.h>
+
+void setUp(){
+    printf("setUp called");
+}
+void tearDown(){
+    printf("tearDown called");
+}
+
+void dummy_test(void) {
+    TEST_ASSERT_EQUAL(1, 1);
+}
+
+int main(int argc, char *argv[]) {
+    printf("Address boundary error is %s", argv[-1]);
+    UNITY_BEGIN();
+    RUN_TEST(dummy_test);
+    UNITY_END();
+    return 0;
+}
+"""
+    )
+    result = clirunner.invoke(
+        unittest_cmd,
+        ["-d", str(project_dir), "-e", "native"],
+    )
+    assert result.exit_code != 0
+    assert any(
+        s in result.output for s in ("Program received signal", "Program errored with")
+    )
+
+
 def test_legacy_unity_custom_transport(clirunner, validate_cliresult, tmpdir):
     project_dir = tmpdir.mkdir("project")
     project_dir.join("platformio.ini").write(