* ext/psych/lib/psych/json/stream.rb: adding a JSON streaming API

* ext/psych/lib/psych/stream.rb: ditto
* ext/psych/lib/psych.rb: using autoload
* ext/psych/lib/psych/json.rb: ditto
* ext/psych/lib/psych/json/tree_builder.rb: refactor
* ext/psych/lib/psych/visitors/json_tree.rb: refactor

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27961 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 75 insertions, 0 deletions

diff --git a/test/psych/json/test_stream.rb b/test/psych/json/test_stream.rb
new file mode 100644
index 0000000000..712465d4c0
--- /dev/null
+++ b/test/psych/json/test_stream.rb
@@ -0,0 +1,75 @@
+require_relative '../helper'
+
+module Psych
+  module JSON
+    class TestStream < TestCase
+      def setup
+        @io     = StringIO.new
+        @stream = Psych::JSON::Stream.new(@io)
+        @stream.start
+      end
+
+      def test_explicit_documents
+        @io     = StringIO.new
+        @stream = Psych::JSON::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(/\.\.\.$/, @io.string)
+      end
+
+      def test_null
+        @stream.push(nil)
+        assert_match(/^--- null/, @io.string)
+      end
+
+      def test_string
+        @stream.push "foo"
+        assert_match(/(['"])foo\1/, @io.string)
+      end
+
+      def test_symbol
+        @stream.push :foo
+        assert_match(/(['"])foo\1/, @io.string)
+      end
+
+      def test_int
+        @stream.push 10
+        assert_match(/^--- 10/, @io.string)
+      end
+
+      def test_float
+        @stream.push 1.2
+        assert_match(/^--- 1.2/, @io.string)
+      end
+
+      def test_hash
+        hash = { 'one' => 'two' }
+        @stream.push hash
+
+        json = @io.string
+        assert_match(/}$/, json)
+        assert_match(/^--- \{/, json)
+        assert_match(/['"]one['"]/, json)
+        assert_match(/['"]two['"]/, json)
+      end
+
+      def test_list_to_json
+        list = %w{ one two }
+        @stream.push list
+
+        json = @io.string
+        assert_match(/]$/, json)
+        assert_match(/^--- \[/, json)
+        assert_match(/['"]one['"]/, json)
+        assert_match(/['"]two['"]/, json)
+      end
+    end
+  end
+end