Tests for GridIO#each

lib/mongo/gridfs/grid.rb

@@ -45,7 +45,7 @@ module Mongo
     end
 
     # Store a file in the file store. This method is designed only for writing new files;
-    # if you need to update a given file, first delete it using #Grid#delete.
+    # if you need to update a given file, first delete it using Grid#delete.
     #
     # Note that arbitary metadata attributes can be saved to the file by passing
     # them in as options.

lib/mongo/gridfs/grid_io.rb

@@ -191,11 +191,14 @@ module Mongo
       end
       id
     end
-    
+
     # Read a chunk of the data from the file and yield it to the given
-    # block. It will read from the current file position.
+    # block.
     #
-    # @param [Block] A block called with each chunk
+    # Note that this method reads from the current file position.
+    #
+    # @yield Yields on chunk per iteration as defined by this file's
+    #   chunk size.
     #
     # @return [Mongo::GridIO] self
     def each

test/grid_io_test.rb

@@ -62,7 +62,6 @@ class GridIOTest < Test::Unit::TestCase
     end
 
     context "Content types" do
-
       if defined?(MIME)
         should "determine common content types from the extension" do
           file = GridIO.new(@files, @chunks, 'sample.pdf', 'w')

test/grid_test.rb

@@ -18,7 +18,8 @@ class GridTest < Test::Unit::TestCase
       setup do
         @data = "GRIDDATA" * 50000
         @grid = Grid.new(@db, 'test-fs')
-        @id   = @grid.put(@data, :filename => 'sample', :metadata => {'app' => 'photos'})
+        @id   = @grid.put(@data, :filename => 'sample',
+                          :metadata => {'app' => 'photos'})
       end
 
       should "check existence" do
@@ -120,7 +121,8 @@ class GridTest < Test::Unit::TestCase
     context "Storing data with a length of zero" do
       setup do
         @grid = Grid.new(@db, 'test-fs')
-        @id   = @grid.put('', :filename => 'sample', :metadata => {'app' => 'photos'})
+        @id   = @grid.put('', :filename => 'sample',
+                          :metadata => {'app' => 'photos'})
       end
 
       should "return the zero length" do
@@ -129,6 +131,34 @@ class GridTest < Test::Unit::TestCase
       end
     end
 
+    context "Grid streaming: " do
+      setup do
+        @grid = Grid.new(@db, 'test-fs')
+        filename = 'sample_data'
+        @io   = File.open(File.join(File.dirname(__FILE__), 'data', filename), 'r')
+        id    = @grid.put(@io, :filename => filename)
+        @file = @grid.get(id)
+        @io.rewind
+        @data = @io.read
+        if @data.respond_to?(:force_encoding)
+          @data.force_encoding("binary")
+        end
+      end
+
+      should "read the file" do
+        read_data = ""
+        @file.each do |chunk|
+          read_data << chunk
+        end
+        assert_equal @data.length, read_data.length
+      end
+
+      should "read the file if no block is given" do
+        read_data = @file.each
+        assert_equal @data.length, read_data.length
+      end
+    end
+
     context "Streaming: " do || {}
       setup do
         def read_and_write_stream(filename, read_length, opts={})
@@ -158,12 +188,12 @@ class GridTest < Test::Unit::TestCase
         read_and_write_stream('small_data.txt', 1)
       end
 
-      should "put and get a large io object when reading smaller than the chunk size" do
-        read_and_write_stream('sample_file.pdf', 256 * 1024)
+      should "put and get a large io object if reading less than the chunk size" do
+        read_and_write_stream('sample_data', 256 * 1024)
       end
 
-      should "put and get a large io object when reading larger than the chunk size" do
-        read_and_write_stream('sample_file.pdf', 300 * 1024)
+      should "put and get a large io object if reading more than the chunk size" do
+        read_and_write_stream('sample_data', 300 * 1024)
       end
     end
   end