#
# Author:: John Keiser (<jkeiser@opscode.com>)
# Copyright:: Copyright (c) 2012 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

require 'spec_helper'
require 'support/shared/unit/file_system_support'
require 'chef/chef_fs/file_pattern'
require 'chef/chef_fs/command_line'

# Removes the date stamp from the diff and replaces it with ' DATE'
# example match: "/dev/null\t2012-10-16 16:15:54.000000000 +0000"
# windows match: "--- /dev/null\tTue Oct 16 18:04:34 2012"
def remove_os_differences(diff)
  diff = diff.gsub(/([+-]{3}.*)\t.*/, '\1 DATE')
  diff.gsub(/^@@ -\d(,\d)? \+\d(,\d)? @@/, 'CONTEXT_LINE_NUMBERS')
end

describe 'diff', :uses_diff => true do
  include FileSystemSupport

  context 'with two filesystems with all types of difference' do
    let(:a) {
      memory_fs('a', {
        :both_dirs => {
          :sub_both_dirs => { :subsub => nil },
          :sub_both_files => nil,
          :sub_both_files_different => "a\n",
          :sub_both_dirs_empty => {},
          :sub_dirs_empty_in_a_filled_in_b => {},
          :sub_dirs_empty_in_b_filled_in_a => { :subsub => nil },
          :sub_a_only_dir => { :subsub => nil },
          :sub_a_only_file => nil,
          :sub_dir_in_a_file_in_b => {},
          :sub_file_in_a_dir_in_b => nil
        },
        :both_files => nil,
        :both_files_different => "a\n",
        :both_dirs_empty => {},
        :dirs_empty_in_a_filled_in_b => {},
        :dirs_empty_in_b_filled_in_a => { :subsub => nil },
        :dirs_in_a_cannot_be_in_b => {},
        :file_in_a_cannot_be_in_b => nil,
        :a_only_dir => { :subsub => nil },
        :a_only_file => nil,
        :dir_in_a_file_in_b => {},
        :file_in_a_dir_in_b => nil
      }, /cannot_be_in_a/)
    }
    let(:b) {
      memory_fs('b', {
        :both_dirs => {
          :sub_both_dirs => { :subsub => nil },
          :sub_both_files => nil,
          :sub_both_files_different => "b\n",
          :sub_both_dirs_empty => {},
          :sub_dirs_empty_in_a_filled_in_b => { :subsub => nil },
          :sub_dirs_empty_in_b_filled_in_a => {},
          :sub_b_only_dir => { :subsub => nil },
          :sub_b_only_file => nil,
          :sub_dir_in_a_file_in_b => nil,
          :sub_file_in_a_dir_in_b => {}
        },
        :both_files => nil,
        :both_files_different => "b\n",
        :both_dirs_empty => {},
        :dirs_empty_in_a_filled_in_b => { :subsub => nil },
        :dirs_empty_in_b_filled_in_a => {},
        :dirs_in_b_cannot_be_in_a => {},
        :file_in_b_cannot_be_in_a => nil,
        :b_only_dir => { :subsub => nil },
        :b_only_file => nil,
        :dir_in_a_file_in_b => nil,
        :file_in_a_dir_in_b => {}
      }, /cannot_be_in_b/)
    }
    it 'Chef::ChefFS::CommandLine.diff(/)' do
      results = []
      Chef::ChefFS::CommandLine.diff(pattern('/'), a, b, nil, nil) do |diff|
        results << remove_os_differences(diff)
      end
      results.should =~ [
        'diff --knife a/both_dirs/sub_both_files_different b/both_dirs/sub_both_files_different
--- a/both_dirs/sub_both_files_different DATE
+++ b/both_dirs/sub_both_files_different DATE
CONTEXT_LINE_NUMBERS
-a
+b
','diff --knife a/both_dirs/sub_dirs_empty_in_a_filled_in_b/subsub b/both_dirs/sub_dirs_empty_in_a_filled_in_b/subsub
new file
--- /dev/null DATE
+++ b/both_dirs/sub_dirs_empty_in_a_filled_in_b/subsub DATE
CONTEXT_LINE_NUMBERS
+subsub
','diff --knife a/both_dirs/sub_dirs_empty_in_b_filled_in_a/subsub b/both_dirs/sub_dirs_empty_in_b_filled_in_a/subsub
deleted file
--- a/both_dirs/sub_dirs_empty_in_b_filled_in_a/subsub DATE
+++ /dev/null DATE
CONTEXT_LINE_NUMBERS
-subsub
','Only in a/both_dirs: sub_a_only_dir
','diff --knife a/both_dirs/sub_a_only_file b/both_dirs/sub_a_only_file
deleted file
--- a/both_dirs/sub_a_only_file DATE
+++ /dev/null DATE
CONTEXT_LINE_NUMBERS
-sub_a_only_file
','File b/both_dirs/sub_dir_in_a_file_in_b is a directory while file b/both_dirs/sub_dir_in_a_file_in_b is a regular file
','File a/both_dirs/sub_file_in_a_dir_in_b is a regular file while file a/both_dirs/sub_file_in_a_dir_in_b is a directory
','Only in b/both_dirs: sub_b_only_dir
','diff --knife a/both_dirs/sub_b_only_file b/both_dirs/sub_b_only_file
new file
--- /dev/null DATE
+++ b/both_dirs/sub_b_only_file DATE
CONTEXT_LINE_NUMBERS
+sub_b_only_file
','diff --knife a/both_files_different b/both_files_different
--- a/both_files_different DATE
+++ b/both_files_different DATE
CONTEXT_LINE_NUMBERS
-a
+b
','diff --knife a/dirs_empty_in_a_filled_in_b/subsub b/dirs_empty_in_a_filled_in_b/subsub
new file
--- /dev/null DATE
+++ b/dirs_empty_in_a_filled_in_b/subsub DATE
CONTEXT_LINE_NUMBERS
+subsub
','diff --knife a/dirs_empty_in_b_filled_in_a/subsub b/dirs_empty_in_b_filled_in_a/subsub
deleted file
--- a/dirs_empty_in_b_filled_in_a/subsub DATE
+++ /dev/null DATE
CONTEXT_LINE_NUMBERS
-subsub
','Only in a: a_only_dir
','diff --knife a/a_only_file b/a_only_file
deleted file
--- a/a_only_file DATE
+++ /dev/null DATE
CONTEXT_LINE_NUMBERS
-a_only_file
','File b/dir_in_a_file_in_b is a directory while file b/dir_in_a_file_in_b is a regular file
','File a/file_in_a_dir_in_b is a regular file while file a/file_in_a_dir_in_b is a directory
','Only in b: b_only_dir
','diff --knife a/b_only_file b/b_only_file
new file
--- /dev/null DATE
+++ b/b_only_file DATE
CONTEXT_LINE_NUMBERS
+b_only_file
' ]
    end
    it 'Chef::ChefFS::CommandLine.diff(/both_dirs)' do
      results = []
      Chef::ChefFS::CommandLine.diff(pattern('/both_dirs'), a, b, nil, nil) do |diff|
        results << remove_os_differences(diff)
      end
      results.should =~ [
        'diff --knife a/both_dirs/sub_both_files_different b/both_dirs/sub_both_files_different
--- a/both_dirs/sub_both_files_different DATE
+++ b/both_dirs/sub_both_files_different DATE
CONTEXT_LINE_NUMBERS
-a
+b
','diff --knife a/both_dirs/sub_dirs_empty_in_a_filled_in_b/subsub b/both_dirs/sub_dirs_empty_in_a_filled_in_b/subsub
new file
--- /dev/null DATE
+++ b/both_dirs/sub_dirs_empty_in_a_filled_in_b/subsub DATE
CONTEXT_LINE_NUMBERS
+subsub
','diff --knife a/both_dirs/sub_dirs_empty_in_b_filled_in_a/subsub b/both_dirs/sub_dirs_empty_in_b_filled_in_a/subsub
deleted file
--- a/both_dirs/sub_dirs_empty_in_b_filled_in_a/subsub DATE
+++ /dev/null DATE
CONTEXT_LINE_NUMBERS
-subsub
','Only in a/both_dirs: sub_a_only_dir
','diff --knife a/both_dirs/sub_a_only_file b/both_dirs/sub_a_only_file
deleted file
--- a/both_dirs/sub_a_only_file DATE
+++ /dev/null DATE
CONTEXT_LINE_NUMBERS
-sub_a_only_file
','File b/both_dirs/sub_dir_in_a_file_in_b is a directory while file b/both_dirs/sub_dir_in_a_file_in_b is a regular file
','File a/both_dirs/sub_file_in_a_dir_in_b is a regular file while file a/both_dirs/sub_file_in_a_dir_in_b is a directory
','Only in b/both_dirs: sub_b_only_dir
','diff --knife a/both_dirs/sub_b_only_file b/both_dirs/sub_b_only_file
new file
--- /dev/null DATE
+++ b/both_dirs/sub_b_only_file DATE
CONTEXT_LINE_NUMBERS
+sub_b_only_file
' ]
    end
    it 'Chef::ChefFS::CommandLine.diff(/) with depth 1' do
      results = []
      Chef::ChefFS::CommandLine.diff(pattern('/'), a, b, 1, nil) do |diff|
        results << remove_os_differences(diff)
      end
      results.should =~ [
'Common subdirectories: /both_dirs
','diff --knife a/both_files_different b/both_files_different
--- a/both_files_different DATE
+++ b/both_files_different DATE
CONTEXT_LINE_NUMBERS
-a
+b
','Common subdirectories: /both_dirs_empty
','Common subdirectories: /dirs_empty_in_b_filled_in_a
','Common subdirectories: /dirs_empty_in_a_filled_in_b
','Only in a: a_only_dir
','diff --knife a/a_only_file b/a_only_file
deleted file
--- a/a_only_file DATE
+++ /dev/null DATE
CONTEXT_LINE_NUMBERS
-a_only_file
','File b/dir_in_a_file_in_b is a directory while file b/dir_in_a_file_in_b is a regular file
','File a/file_in_a_dir_in_b is a regular file while file a/file_in_a_dir_in_b is a directory
','Only in b: b_only_dir
','diff --knife a/b_only_file b/b_only_file
new file
--- /dev/null DATE
+++ b/b_only_file DATE
CONTEXT_LINE_NUMBERS
+b_only_file
' ]
    end
    it 'Chef::ChefFS::CommandLine.diff(/*_*) with depth 0' do
      results = []
      Chef::ChefFS::CommandLine.diff(pattern('/*_*'), a, b, 0, nil) do |diff|
        results << remove_os_differences(diff)
      end
      results.should =~ [
'Common subdirectories: /both_dirs
','diff --knife a/both_files_different b/both_files_different
--- a/both_files_different DATE
+++ b/both_files_different DATE
CONTEXT_LINE_NUMBERS
-a
+b
','Common subdirectories: /both_dirs_empty
','Common subdirectories: /dirs_empty_in_b_filled_in_a
','Common subdirectories: /dirs_empty_in_a_filled_in_b
','Only in a: a_only_dir
','diff --knife a/a_only_file b/a_only_file
deleted file
--- a/a_only_file DATE
+++ /dev/null DATE
CONTEXT_LINE_NUMBERS
-a_only_file
','File b/dir_in_a_file_in_b is a directory while file b/dir_in_a_file_in_b is a regular file
','File a/file_in_a_dir_in_b is a regular file while file a/file_in_a_dir_in_b is a directory
','Only in b: b_only_dir
','diff --knife a/b_only_file b/b_only_file
new file
--- /dev/null DATE
+++ b/b_only_file DATE
CONTEXT_LINE_NUMBERS
+b_only_file
' ]
    end
    it 'Chef::ChefFS::CommandLine.diff(/) in name-only mode' do
      results = []
      Chef::ChefFS::CommandLine.diff(pattern('/'), a, b, nil, :name_only) do |diff|
        results << remove_os_differences(diff)
      end
      results.should =~ [
          "b/both_dirs/sub_both_files_different\n",
          "b/both_dirs/sub_dirs_empty_in_b_filled_in_a/subsub\n",
          "b/both_dirs/sub_dirs_empty_in_a_filled_in_b/subsub\n",
          "b/both_dirs/sub_a_only_dir\n",
          "b/both_dirs/sub_a_only_file\n",
          "b/both_dirs/sub_b_only_dir\n",
          "b/both_dirs/sub_b_only_file\n",
          "b/both_dirs/sub_dir_in_a_file_in_b\n",
          "b/both_dirs/sub_file_in_a_dir_in_b\n",
          "b/both_files_different\n",
          "b/dirs_empty_in_b_filled_in_a/subsub\n",
          "b/dirs_empty_in_a_filled_in_b/subsub\n",
          "b/a_only_dir\n",
          "b/a_only_file\n",
          "b/b_only_dir\n",
          "b/b_only_file\n",
          "b/dir_in_a_file_in_b\n",
          "b/file_in_a_dir_in_b\n"
      ]
    end
    it 'Chef::ChefFS::CommandLine.diff(/) in name-status mode' do
      results = []
      Chef::ChefFS::CommandLine.diff(pattern('/'), a, b, nil, :name_status) do |diff|
        results << remove_os_differences(diff)
      end
      results.should =~ [
          "M\tb/both_dirs/sub_both_files_different\n",
          "D\tb/both_dirs/sub_dirs_empty_in_b_filled_in_a/subsub\n",
          "A\tb/both_dirs/sub_dirs_empty_in_a_filled_in_b/subsub\n",
          "D\tb/both_dirs/sub_a_only_dir\n",
          "D\tb/both_dirs/sub_a_only_file\n",
          "A\tb/both_dirs/sub_b_only_dir\n",
          "A\tb/both_dirs/sub_b_only_file\n",
          "T\tb/both_dirs/sub_dir_in_a_file_in_b\n",
          "T\tb/both_dirs/sub_file_in_a_dir_in_b\n",
          "M\tb/both_files_different\n",
          "D\tb/dirs_empty_in_b_filled_in_a/subsub\n",
          "A\tb/dirs_empty_in_a_filled_in_b/subsub\n",
          "D\tb/a_only_dir\n",
          "D\tb/a_only_file\n",
          "A\tb/b_only_dir\n",
          "A\tb/b_only_file\n",
          "T\tb/dir_in_a_file_in_b\n",
          "T\tb/file_in_a_dir_in_b\n"
      ]
    end
  end
end