Added tests for Dir instance methods

lib/fakefs/dir.rb

@@ -1,7 +1,55 @@
 module FakeFS
   class Dir
-    def self.glob(pattern)
-      [FileSystem.find(pattern) || []].flatten.map{|e| e.to_s}.sort
+    include Enumerable
+
+    def initialize(string)
+      raise Errno::ENOENT, string unless FileSystem.find(string)
+      @path = string
+      @open = true
+      @pointer = 0
+      @contents = [ '.', '..', ] + FileSystem.find(@path).values
+    end
+
+    def close
+      @open = false
+      @pointer = nil
+      @contents = nil
+      nil
+    end
+
+    def each(&block)
+      while f = read
+        yield f
+      end
+    end
+
+    def path
+      @path
+    end
+
+    def pos
+      @pointer
+    end
+
+    def pos=(integer)
+      @pointer = integer
+    end
+
+    def read
+      raise IOError, "closed directory" if @pointer == nil
+      n = @contents[@pointer]
+      @pointer += 1
+      n.to_s if n
+    end
+
+    def rewind
+      @pointer = 0
+    end
+
+    def seek(integer)
+      raise IOError, "closed directory" if @pointer == nil
+      @pointer = integer
+      @contents[integer]
     end
    
     def self.[](pattern)
@@ -12,12 +60,52 @@ module FakeFS
       FileSystem.chdir(dir, &blk)
     end
 
+    def self.chroot(string)
+      # Not implemented yet
+    end
+
+    def self.delete(string)
+      FileSystem.delete(string) 
+    end
+
+    def self.entries(dirname)
+      raise SystemCallError, dirname unless FileSystem.find(dirname)
+      Dir.new(dirname).map { |file| file }
+    end
+
+    def self.foreach(dirname, &block)
+      Dir.open(dirname) { |file| yield file }
+    end
+    
+    def self.glob(pattern)
+      [FileSystem.find(pattern) || []].flatten.map{|e| e.to_s}.sort
+    end
+
+    def self.mkdir(string, integer = 0)
+      FileUtils.mkdir_p(string)
+    end
+
+    def self.open(string, &block)
+      if block_given?
+        d = Dir.new(string).each { |file| yield(file) }
+        d.close
+      else
+        Dir.new(string)
+      end
+    end
+
+    def tmpdir
+      '/tmp'
+    end
+
     def self.pwd
       FileSystem.current_dir.to_s
     end
 
     class << self
       alias_method :getwd, :pwd
+      alias_method :rmdir, :delete
+      alias_method :unline, :delete
     end
   end
 end

test/fakefs_test.rb

@@ -532,6 +532,169 @@ class FakeFSTest < Test::Unit::TestCase
     }
   end
 
+  # Directory tests
+  def test_new_directory
+    FileUtils.mkdir_p('/this/path/should/be/here')
+
+    assert_nothing_raised {
+      Dir.new('/this/path/should/be/here')
+    }
+  end
+
+  def test_new_directory_does_not_work_if_dir_path_cannot_be_found
+    assert_raises(Errno::ENOENT) {
+      Dir.new('/this/path/should/not/be/here')
+    }
+  end
+
+  def test_close
+    FileUtils.mkdir_p('/this/path/should/be/here')
+    dir = Dir.new('/this/path/should/be/here')
+    assert dir.close.nil?
+
+    assert_raises(IOError) {
+      dir.each { |dir| dir }
+    }
+  end
+
+  def test_each
+    test = ['.', '..', '/this/path/should/be/here/file_1', '/this/path/should/be/here/file_2', '/this/path/should/be/here/file_3', '/this/path/should/be/here/file_4', '/this/path/should/be/here/file_5' ]
+    
+    FileUtils.mkdir_p('/this/path/should/be/here')
+
+    test.each do |f|
+      FileUtils.touch(f)
+    end
+
+    dir = Dir.new('/this/path/should/be/here')
+
+    yielded = []
+    dir.each do |dir|
+      yielded << dir
+    end
+    
+    assert yielded.size == test.size
+    test.each { |t| assert yielded.include?(t) }
+  end
+
+  def test_path
+     FileUtils.mkdir_p('/this/path/should/be/here')
+     assert Dir.new('/this/path/should/be/here').path == '/this/path/should/be/here'
+  end
+
+  def test_pos
+    test = ['.', '..', '/this/path/should/be/here/file_1', '/this/path/should/be/here/file_2', '/this/path/should/be/here/file_3', '/this/path/should/be/here/file_4', '/this/path/should/be/here/file_5' ]
+    FileUtils.mkdir_p('/this/path/should/be/here')
+    test.each do |f|
+      FileUtils.touch(f)
+    end
+
+    dir = Dir.new('/this/path/should/be/here')
+
+    assert dir.pos == 0
+    dir.read
+    assert dir.pos == 1
+    dir.read
+    assert dir.pos == 2
+    dir.read
+    assert dir.pos == 3
+    dir.read
+    assert dir.pos == 4
+    dir.read
+    assert dir.pos == 5
+  end
+
+  def test_pos_assign
+    test = ['.', '..', '/this/path/should/be/here/file_1', '/this/path/should/be/here/file_2', '/this/path/should/be/here/file_3', '/this/path/should/be/here/file_4', '/this/path/should/be/here/file_5' ]
+    FileUtils.mkdir_p('/this/path/should/be/here')
+    test.each do |f|
+      FileUtils.touch(f)
+    end
+
+    dir = Dir.new('/this/path/should/be/here')
+
+    assert dir.pos == 0
+    dir.pos = 2
+    assert dir.pos == 2
+  end
+
+  def test_read
+    test = ['.', '..', '/this/path/should/be/here/file_1', '/this/path/should/be/here/file_2', '/this/path/should/be/here/file_3', '/this/path/should/be/here/file_4', '/this/path/should/be/here/file_5' ]
+    FileUtils.mkdir_p('/this/path/should/be/here')
+    test.each do |f|
+      FileUtils.touch(f)
+    end
+
+    dir = Dir.new('/this/path/should/be/here')
+
+    assert dir.pos == 0
+    d = dir.read
+    assert dir.pos == 1
+    assert d == '.'
+    
+    d = dir.read
+    assert dir.pos == 2
+    assert d == '..'
+  end
+
+  def test_read_past_length
+    test = ['.', '..', '/this/path/should/be/here/file_1', '/this/path/should/be/here/file_2', '/this/path/should/be/here/file_3', '/this/path/should/be/here/file_4', '/this/path/should/be/here/file_5' ]
+    FileUtils.mkdir_p('/this/path/should/be/here')
+    test.each do |f|
+      FileUtils.touch(f)
+    end
+
+    dir = Dir.new('/this/path/should/be/here')
+
+    d = dir.read
+    assert_not_nil d
+    d = dir.read
+    assert_not_nil d
+    d = dir.read
+    assert_not_nil d
+    d = dir.read
+    assert_not_nil d
+    d = dir.read
+    assert_not_nil d
+    d = dir.read
+    assert_not_nil d
+    d = dir.read
+    assert_not_nil d
+    d = dir.read
+    assert_nil d
+  end
+ 
+  def test_rewind
+    test = ['.', '..', '/this/path/should/be/here/file_1', '/this/path/should/be/here/file_2', '/this/path/should/be/here/file_3', '/this/path/should/be/here/file_4', '/this/path/should/be/here/file_5' ]
+    FileUtils.mkdir_p('/this/path/should/be/here')
+    test.each do |f|
+      FileUtils.touch(f)
+    end
+
+    dir = Dir.new('/this/path/should/be/here')
+
+    d = dir.read
+    d = dir.read
+    assert dir.pos == 2
+    dir.rewind
+    assert dir.pos == 0
+  end
+
+  def test_seek
+     test = ['.', '..', '/this/path/should/be/here/file_1', '/this/path/should/be/here/file_2', '/this/path/should/be/here/file_3', '/this/path/should/be/here/file_4', '/this/path/should/be/here/file_5' ]
+    FileUtils.mkdir_p('/this/path/should/be/here')
+    test.each do |f|
+      FileUtils.touch(f)
+    end
+
+    dir = Dir.new('/this/path/should/be/here')
+
+    d = dir.seek 1
+    puts d
+    assert d == '..'
+    assert dir.pos == 1
+  end
+
   def here(fname)
     RealFile.expand_path(RealFile.dirname(__FILE__)+'/'+fname)
   end