[commands] Add property tests for command compositions (#4715)

wpilibNewCommands/src/test/native/cpp/frc2/command/ParallelRaceGroupTest.cpp

@@ -3,6 +3,7 @@
 // the WPILib BSD license file in the root directory of this project.
 
 #include "CommandTestBase.h"
+#include "CompositionTestBase.h"
 #include "frc2/command/InstantCommand.h"
 #include "frc2/command/ParallelRaceGroup.h"
 #include "frc2/command/SequentialCommandGroup.h"
@@ -202,3 +203,6 @@ TEST_F(ParallelRaceGroupTest, ParallelRaceScheduleTwice) {
 
   EXPECT_FALSE(scheduler.IsScheduled(&group));
 }
+
+INSTANTIATE_MULTI_COMMAND_COMPOSITION_TEST_SUITE(ParallelRaceGroupTest,
+                                                 ParallelRaceGroup);