def test_merge
    log = "sample log"
    file = "sample.txt"
    src = "sample\n"
    trunk = File.join(@wc_path, "trunk")
    branch = File.join(@wc_path, "branch")
    trunk_path = File.join(trunk, file)
    branch_path = File.join(branch, file)

    ctx = make_context(log)
    ctx.mkdir(trunk, branch)
    File.open(trunk_path, "w") {}
    File.open(branch_path, "w") {}
    ctx.add(trunk_path)
    ctx.add(branch_path)
    rev1 = ctx.commit(@wc_path).revision

    File.open(branch_path, "w") {|f| f.print(src)}
    rev2 = ctx.commit(@wc_path).revision

    ctx.merge(branch, rev1, branch, rev2, trunk)
    rev3 = ctx.commit(@wc_path).revision

    assert_equal(src, ctx.cat(trunk_path, rev3))

    ctx.rm(branch_path)
    rev4 = ctx.commit(@wc_path).revision

    ctx.merge(branch, rev3, branch, rev4, trunk)
    assert(!File.exist?(trunk_path))

    ctx.revert(trunk_path)
    File.open(trunk_path, "a") {|f| f.print(src)}
    ctx.merge(branch, rev3, branch, rev4, trunk)
    assert(File.exist?(trunk_path))
    rev5 = ctx.commit(@wc_path).revision

    File.open(trunk_path, "a") {|f| f.print(src)}
    ctx.merge(branch, rev3, branch, rev4, trunk, true, false, true, true)
    assert(File.exist?(trunk_path))

    ctx.merge(branch, rev3, branch, rev4, trunk, true, false, true)
    rev6 = ctx.commit(@wc_path).revision

    assert(!File.exist?(trunk_path))
  end