Ticket #8746: bigdecimal2.diff

activesupport/test/bigdecimal_test.rb

@@ +1 @@
+require File.dirname(__FILE__) + '/abstract_unit'
+require 'active_support/bigdecimal'
+
+class BigDecimalYamlTest < Test::Unit::TestCase
+  def test_to_yaml
+    assert_equal "--- 100000.30020320320000000000000000000000000000001\n", BigDecimal.new('100000.30020320320000000000000000000000000000001').to_yaml
+    assert_equal "--- .Inf\n", BigDecimal.new('Infinity').to_yaml
+    assert_equal "--- .NaN\n", BigDecimal.new('NaN').to_yaml
+  end
+end

activesupport/lib/active_support/bigdecimal.rb

@@ +1 @@
+require 'test/unit'
+require 'yaml'
+require 'bigdecimal'
+require 'rubygems'
+require 'active_support'
+
+class BigDecimal
+yaml_as "tag:yaml.org,2002:float"
+  def to_yaml( opts = {} )
+    YAML::quick_emit( nil, opts ) do |out|
+      # This emits the number without any scientific notation.
+      # I prefer it to using self.to_f.to_s, which would lose precision.
+      #
+      # Note that YAML allows that when reconsituting floats
+      # to native types, some precision may get lost.
+      # There is no full precision real YAML tag that I am aware of.
+      str = self.to_s
+      if str == "Infinity"
+        str = ".Inf"
+      elsif str == "-Infinity"
+        str = "-.Inf"
+      elsif str == "NaN"
+        str = ".NaN"
+      end
+      out.scalar( "tag:yaml.org,2002:float", str, :plain )
+    end
+  end
+end

activesupport/lib/active_support.rb

@@ -42 +42 @@
-require 'active_support/json'
-
-require 'active_support/multibyte'
+
+require 'active_support/bigdecimal'