dexlib2/src/test/java/org/jf/dexlib2/builder/MutableMethodImplementationTest.java

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package org.jf.dexlib2.builder;

import org.jf.dexlib2.Opcode;
import org.jf.dexlib2.builder.instruction.BuilderInstruction10x;
import org.jf.dexlib2.builder.instruction.BuilderInstruction32x;
import org.jf.dexlib2.iface.MethodImplementation;
import org.junit.Assert;
import org.junit.Test;

public class MutableMethodImplementationTest {

    @Test
    public void testTryEndAtEndOfMethod() {
        MethodImplementationBuilder builder = new MethodImplementationBuilder(10);

        Label startLabel = builder.addLabel("start");
        builder.addInstruction(new BuilderInstruction10x(Opcode.NOP));
        builder.addInstruction(new BuilderInstruction10x(Opcode.NOP));
        builder.addInstruction(new BuilderInstruction10x(Opcode.NOP));
        builder.addInstruction(new BuilderInstruction10x(Opcode.NOP));
        builder.addInstruction(new BuilderInstruction10x(Opcode.NOP));
        builder.addInstruction(new BuilderInstruction32x(Opcode.MOVE_16, 0, 0));
        Label endLabel = builder.addLabel("end");

        builder.addCatch(startLabel, endLabel, startLabel);

        MethodImplementation methodImplementation = builder.getMethodImplementation();

        Assert.assertEquals(0, methodImplementation.getTryBlocks().get(0).getStartCodeAddress());
        Assert.assertEquals(8, methodImplementation.getTryBlocks().get(0).getCodeUnitCount());

        methodImplementation = new MutableMethodImplementation(methodImplementation);

        Assert.assertEquals(0, methodImplementation.getTryBlocks().get(0).getStartCodeAddress());
        Assert.assertEquals(8, methodImplementation.getTryBlocks().get(0).getCodeUnitCount());
    }

    @Test
    public void testNewLabelByAddress() {
        MethodImplementationBuilder builder = new MethodImplementationBuilder(10);

        builder.addInstruction(new BuilderInstruction10x(Opcode.NOP));
        builder.addInstruction(new BuilderInstruction10x(Opcode.NOP));
        builder.addInstruction(new BuilderInstruction10x(Opcode.NOP));
        builder.addInstruction(new BuilderInstruction10x(Opcode.NOP));
        builder.addInstruction(new BuilderInstruction10x(Opcode.NOP));
        builder.addInstruction(new BuilderInstruction32x(Opcode.MOVE_16, 0, 0));

        MutableMethodImplementation mutableMethodImplementation =
                new MutableMethodImplementation(builder.getMethodImplementation());

        mutableMethodImplementation.addCatch(
                mutableMethodImplementation.newLabelForAddress(0),
                mutableMethodImplementation.newLabelForAddress(8),
                mutableMethodImplementation.newLabelForAddress(1));

        Assert.assertEquals(0, mutableMethodImplementation.getTryBlocks().get(0).getStartCodeAddress());
        Assert.assertEquals(8, mutableMethodImplementation.getTryBlocks().get(0).getCodeUnitCount());
        Assert.assertEquals(1, mutableMethodImplementation.getTryBlocks().get(0).getExceptionHandlers().get(0)
                .getHandlerCodeAddress());
    }

    @Test
    public void testNewLabelByIndex() {
        MethodImplementationBuilder builder = new MethodImplementationBuilder(10);

        builder.addInstruction(new BuilderInstruction10x(Opcode.NOP));
        builder.addInstruction(new BuilderInstruction10x(Opcode.NOP));
        builder.addInstruction(new BuilderInstruction10x(Opcode.NOP));
        builder.addInstruction(new BuilderInstruction10x(Opcode.NOP));
        builder.addInstruction(new BuilderInstruction10x(Opcode.NOP));
        builder.addInstruction(new BuilderInstruction32x(Opcode.MOVE_16, 0, 0));

        MutableMethodImplementation mutableMethodImplementation =
                new MutableMethodImplementation(builder.getMethodImplementation());

        mutableMethodImplementation.addCatch(
                mutableMethodImplementation.newLabelForIndex(0),
                mutableMethodImplementation.newLabelForIndex(6),
                mutableMethodImplementation.newLabelForIndex(1));

        Assert.assertEquals(0, mutableMethodImplementation.getTryBlocks().get(0).getStartCodeAddress());
        Assert.assertEquals(8, mutableMethodImplementation.getTryBlocks().get(0).getCodeUnitCount());
        Assert.assertEquals(1, mutableMethodImplementation.getTryBlocks().get(0).getExceptionHandlers().get(0)
                .getHandlerCodeAddress());
    }
}