Add tests - both failing for now

tests/Roster.cpp

@@ -40,6 +40,56 @@ TEST_F(DCCEXProtocolTest, getRosterWithThreeIDs) {
   EXPECT_CALL(_delegate, receivedRosterList()).Times(Exactly(1));
   _dccexProtocol.check();
 
-  // Returns true since roster ist complete
+  // Returns true since roster is complete
   EXPECT_TRUE(_dccexProtocol.receivedRoster());
+}
+
+TEST_F(DCCEXProtocolTest, createLoco) {
+  // Create an individual loco
+  Loco *loco1 = new Loco(1, LocoSource::LocoSourceEntry);
+  loco1->setName("Loco 1");
+
+  // Check address is 1, name is correct, and LocoSource correct
+  EXPECT_EQ(loco1->getAddress(), 1);
+  EXPECT_STREQ(loco1->getName(), "Loco 1");
+  EXPECT_EQ(loco1->getSource(), LocoSource::LocoSourceEntry);
+
+  // Ensure next is nullptr as this is the only loco
+  ASSERT_NE(loco1->getNext(), nullptr);
+}
+
+TEST_F(DCCEXProtocolTest, legacyRosterCreation) {
+  // Roster should start empty
+  EXPECT_EQ(_dccexProtocol.roster->getFirst(), nullptr);
+
+  // Add three locos
+  Loco *loco42 = new Loco(42, LocoSource::LocoSourceRoster);
+  loco42->setName("Loco42");
+  Loco *loco9 = new Loco(9, LocoSource::LocoSourceRoster);
+  loco9->setName("Loco9");
+  Loco *loco120 = new Loco(120, LocoSource::LocoSourceRoster);
+  loco120->setName("Loco120");
+
+  // Now verify the roster
+  Loco* firstLoco = _dccexProtocol.roster->getFirst();
+  ASSERT_NE(firstLoco, nullptr);
+
+  // Check first loco details
+  EXPECT_EQ(firstLoco->getAddress(), 42);
+  EXPECT_STREQ(firstLoco->getName(), "Loco42");
+
+  // Verify second loco details
+  Loco* secondLoco = firstLoco->getNext();
+  ASSERT_NE(secondLoco, nullptr);
+  EXPECT_EQ(secondLoco->getAddress(), 9);
+  EXPECT_STREQ(secondLoco->getName(), "Loco9");
+
+  // Verify third loco details
+  Loco *thirdLoco = secondLoco->getNext();
+  ASSERT_NE(thirdLoco, nullptr);
+  EXPECT_EQ(thirdLoco->getAddress(), 120);
+  EXPECT_STREQ(thirdLoco->getName(), "Loco120");
+
+  // Verify end of linked list
+  ASSERT_NE(thirdLoco->getNext(), nullptr);
 }