package net.sf.jode.bytecode;
import junit.framework.*;
import java.io.*;

public class BlockTest extends TestCase implements Opcodes {
    public BlockTest(String name) {
	super(name);
    }
    
    public void testJsr() {
	Block b1 = new Block();
	Block b2 = new Block();
	Instruction jsr = Instruction.forOpcode(opc_jsr);
	b1.setCode(new Instruction[] { jsr }, new Block[] { b2, null } );
	assertEquals("pop", 0, b1.maxpop);
	assertEquals("push", 0, b1.maxpush);
	assertEquals("delta", 0, b1.delta);
	try {
	    b1.setCode(new Instruction[] { jsr }, new Block[] { b2 });
	    fail("jsr must have two successors");
	} catch (IllegalArgumentException ex) {
	}
	try {
	    b1.setCode(new Instruction[] { jsr }, 
		       new Block[] { null, b2 });
	    fail("jsr succ mustn't be null");
	} catch (IllegalArgumentException ex) {
	}
	try {
	    b1.setCode(new Instruction[] { jsr, 
					   Instruction.forOpcode(opc_nop) }, 
		       new Block[] { null, b2 });
	    fail("jsr must be last in block");
	} catch (IllegalArgumentException ex) {
	}

    }

    public static Test suite() {
	TestSuite suite = new TestSuite(); 
	suite.addTest(new BlockTest("testJsr")); 
	return suite;
    }
}