protected void setContextReg(Program program, String minAddress, String maxAddress, long value)
			throws ContextChangeException {
		ProgramContext programContext = program.getProgramContext();
		Register contextReg = programContext.getBaseContextRegister();
		programContext.setRegisterValue(addr(program, minAddress), addr(program, maxAddress),
			new RegisterValue(contextReg, BigInteger.valueOf(value)));
	}
Assert that the code units from the two indicated programs are the same
for the addresses indicated by the address set.
If not then a JUnit failure occurs.
@param p1 first program
@param p2 second program
@param addrs address set where code units should be the same.
@throws ProgramConflictException if the programs can't be compared.
Ghidra/Features/Base/src/test.slow/java/ghidra/app/merge/listing/AbstractListingMergeManagerTest.java