require File.dirname(__FILE__) + '/test_helper'

describe 'Braid::Mirror.new_from_options' do
  it 'should default branch to master' do
    new_from_options('git://path')
    expect(@mirror.branch).to eq('master')
  end

  it 'should default mirror to last path part, ignoring trailing .git' do
    new_from_options('http://path.git')
    expect(@mirror.path).to eq('path')
  end

  it 'should strip trailing slash from specified path' do
    new_from_options('http://path.git', 'path' => 'vendor/tools/mytool/')
    expect(@mirror.path).to eq('vendor/tools/mytool')
  end
end

describe 'Braid::Mirror#diff' do
  before(:each) do
    @mirror = build_mirror('revision' => 'a' * 40, 'url' => 'git://path')
    @mirror.stubs(:base_revision).returns(@mirror.revision) # bypass rev_parse
  end

  def set_hashes(remote_hash, local_hash)
    git.expects(:rev_parse).with("#{@mirror.revision}:").returns(remote_hash)
    git.expects(:tree_hash).with(@mirror.path).returns(local_hash)
  end

  it 'should return an empty string when the hashes match' do
    set_hashes('b' * 40, 'b' * 40)
    git.expects(:fetch)
    git.expects(:diff_tree).never
    expect(@mirror.diff).to eq('')
  end

  it 'should generate a diff when the hashes do not match' do
    set_hashes('b' * 40, 'c' * 40)
    diff = "diff --git a/path b/path\n"
    git.expects(:fetch)
    git.expects(:diff_tree).with('b' * 40, 'c' * 40).returns(diff)
    expect(@mirror.diff).to eq(diff)
  end
end

describe 'Braid::Mirror#base_revision' do
  it 'should be inferred when no revision is set' do
    @mirror = build_mirror
    expect(@mirror.revision).to be_nil
    @mirror.expects(:inferred_revision).returns('b' * 40)
    expect(@mirror.base_revision).to eq('b' * 40)
  end

  it 'should be the parsed hash for git mirrors' do
    @mirror = build_mirror('revision' => 'a' * 7)
    git.expects(:rev_parse).with('a' * 7).returns('a' * 40)
    expect(@mirror.base_revision).to eq('a' * 40)
  end
end

describe 'Braid::Mirror#inferred_revision' do
  it 'should return the last commit before the most recent update' do
    @mirror = new_from_options('git://path')
    git.expects(:rev_list).times(2).returns(
        "#{'a' * 40}\n",
        "commit #{'b' * 40}\n#{'t' * 40}\n"
    )
    git.expects(:tree_hash).with(@mirror.path, 'a' * 40).returns('t' * 40)
    expect(@mirror.send(:inferred_revision)).to eq('b' * 40)
  end
end

describe 'Braid::Mirror#cached?' do
  before(:each) do
    @mirror = new_from_options('git://path')
  end

  it 'should be true when the remote path matches the cache path' do
    git.expects(:remote_url).with(@mirror.remote).returns(git_cache.path(@mirror.url))
    expect(@mirror).to be_cached
  end

  it 'should be false if the remote does not point to the cache' do
    git.expects(:remote_url).with(@mirror.remote).returns(@mirror.url)
    expect(@mirror).not_to be_cached
  end
end