Adding test code for CanMsg::CanMsg.

Author: aentinger

test/CMakeLists.txt

@@ -25,6 +25,7 @@ set(TEST_TARGET ${CMAKE_PROJECT_NAME})
 ##########################################################################
 
 set(TEST_SRCS
+  src/CanMsg/test_CanMsg.cpp
   src/CanMsg/test_CanExtendedId.cpp
   src/CanMsg/test_CanStandardId.cpp
   src/CanMsg/test_isExtendedId.cpp

test/src/CanMsg/test_CanMsg.cpp

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2020 Arduino.  All rights reserved.
+ */
+
+/**************************************************************************************
+ * INCLUDE
+ **************************************************************************************/
+
+#include <catch.hpp>
+
+#include <CanMsg.h>
+
+/**************************************************************************************
+ * NAMESPACE
+ **************************************************************************************/
+
+using namespace arduino;
+
+/**************************************************************************************
+ * TEST CODE
+ **************************************************************************************/
+
+TEST_CASE ("Test constructor with no data (data length = 0)", "[CanMsg-CanMsg-01]")
+{
+  CanMsg const msg(CanStandardId(0x20), 0, nullptr);
+
+  REQUIRE(msg.data_length == 0);
+  for (size_t i = 0; i < CanMsg::MAX_DATA_LENGTH; i++)
+    REQUIRE(msg.data[i] == 0);
+}
+
+TEST_CASE ("Test constructor with data (data length < CanMsg::MAX_DATA_LENGTH)", "[CanMsg-CanMsg-02]")
+{
+  uint8_t const msg_data[4] = {0xDE, 0xAD, 0xC0, 0xDE};
+
+  CanMsg const msg(CanStandardId(0x20), sizeof(msg_data), msg_data);
+
+  REQUIRE(msg.data_length == 4);
+  for (size_t i = 0; i < msg.data_length; i++)
+    REQUIRE(msg.data[i] == msg_data[i]);
+}
+
+TEST_CASE ("Test constructor with data (data length > CanMsg::MAX_DATA_LENGTH)", "[CanMsg-CanMsg-03]")
+{
+  uint8_t const msg_data[12] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11};
+
+  CanMsg const msg(CanStandardId(0x20), sizeof(msg_data), msg_data);
+
+  REQUIRE(msg.data_length == 8);
+  for (size_t i = 0; i < msg.data_length; i++)
+    REQUIRE(msg.data[i] == msg_data[i]);
+}