* ext/psych/lib/psych/stream.rb: adding YAML streaming API for

  infinite length streams.
* ext/psych/lib/psych.rb: refactoring for streaming API
* ext/psych/lib/psych/{handler, stream, tree_builder}.rb: ditto

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27912 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 49 insertions, 0 deletions

diff --git a/test/psych/test_stream.rb b/test/psych/test_stream.rb
new file mode 100644
index 0000000000..7e2f996708
--- /dev/null
+++ b/test/psych/test_stream.rb
@@ -0,0 +1,49 @@
+require_relative 'helper'
+
+module Psych
+  class TestStream < TestCase
+    def test_explicit_documents
+      io     = StringIO.new
+      stream = Psych::Stream.new(io)
+      stream.start
+      stream.push({ 'foo' => 'bar' })
+
+      assert !stream.finished?, 'stream not finished'
+      stream.finish
+      assert stream.finished?, 'stream finished'
+
+      assert_match(/^---/, io.string)
+      assert_match(/\.\.\.$/, io.string)
+    end
+
+    def test_start_takes_block
+      io     = StringIO.new
+      stream = Psych::Stream.new(io)
+      stream.start do |emitter|
+        emitter.push({ 'foo' => 'bar' })
+      end
+
+      assert stream.finished?, 'stream finished'
+      assert_match(/^---/, io.string)
+      assert_match(/\.\.\.$/, io.string)
+    end
+
+    def test_no_backreferences
+      io     = StringIO.new
+      stream = Psych::Stream.new(io)
+      stream.start do |emitter|
+        x = { 'foo' => 'bar' }
+        emitter.push x
+        emitter.push x
+      end
+
+      assert stream.finished?, 'stream finished'
+      assert_match(/^---/, io.string)
+      assert_match(/\.\.\.$/, io.string)
+      assert_equal 2, io.string.scan('---').length
+      assert_equal 2, io.string.scan('...').length
+      assert_equal 2, io.string.scan('foo').length
+      assert_equal 2, io.string.scan('bar').length
+    end
+  end
+end