@Test
	public void branchInstrInvalidOpcodeTest_BRE() { //Tests instruction isn't created with illegal opcode for format
		try {
			instr = new BranchInstr(Opcode.BRE, 0); //BRE requires 3 parameters; the third representing a register
		}
		catch (IllegalStateException e) {
		System.out.println(e.getMessage());
		}
		assertNull(instr); //instr should be null if creation has failed, which it should because of invalid opcode
	}