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')
    @mirror.branch.should == 'master'
  end

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

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