Add missing BigDecimal constant definitions.

Author: nirvdrum

CHANGELOG.md

@@ -5,6 +5,7 @@ Bug fixes:
 * Fixed `BigDecimal#dup` so it now just returns the receiver, per Ruby 2.5+ semantics (#1680).
 * Fixed creating `BigDecimal` instances from non-finite `Float` values (#1685).
 * Fixed `BigDecimal#inspect` output for non-finite values (e.g, NaN or -Infinity) (#1683).
+* Added missing `BigDecimal` constant definitions (#1684).
 * Implemented `rb_eval_string_protect`.
 * Fixed `rb_get_kwargs` to correctly handle optional and rest arguments.
 

lib/truffle/bigdecimal.rb

@@ -1,4 +1,4 @@
-# Copyright (c) 2015, 2017 Oracle and/or its affiliates. All rights reserved. This
+# Copyright (c) 2015, 2019 Oracle and/or its affiliates. All rights reserved. This
 # code is released under a tri EPL/GPL/LGPL license. You can use it,
 # redistribute it and/or modify it under the terms of the:
 #
@@ -11,7 +11,11 @@
 class BigDecimal < Numeric
   include Comparable
 
-  BASE = 10_000
+  VERSION = '1.4.1'
+
+  BASE = 1_000_000_000
+  INFINITY = Float::INFINITY
+  NAN = Float::NAN
 
   SIGN_NEGATIVE_INFINITE = -3
   SIGN_NEGATIVE_FINITE   = -2

spec/ruby/library/bigdecimal/constants_spec.rb

@@ -0,0 +1,76 @@
+require_relative '../../spec_helper'
+require 'bigdecimal'
+
+describe "BigDecimal constants" do
+  ruby_version_is "2.5" do
+    it "defines a VERSION value" do
+      BigDecimal.const_defined?(:VERSION).should be_true
+    end
+  end
+
+  it "has a BASE value" do
+    platform_is wordsize: 64 do
+      BigDecimal::BASE.should == 1000000000
+    end
+
+    platform_is wordsize: 32 do
+      BigDecimal::BASE.should == 10000
+    end
+  end
+
+  it "has a NaN value" do
+    BigDecimal::NAN.nan?.should be_true
+  end
+
+  it "has an INFINITY value" do
+    BigDecimal::INFINITY.infinite?.should == 1
+  end
+
+  describe "exception-related constants" do
+    [
+      [:EXCEPTION_ALL, 0xff],
+      [:EXCEPTION_INFINITY, 0x01],
+      [:EXCEPTION_NaN, 0x02],
+      [:EXCEPTION_UNDERFLOW, 0x04],
+      [:EXCEPTION_OVERFLOW, 0x01],
+      [:EXCEPTION_ZERODIVIDE, 0x10]
+    ].each do |const, value|
+      it "has a #{const} value" do
+        BigDecimal.const_get(const).should == value
+      end
+    end
+  end
+
+  describe "rounding-related constants" do
+    [
+      [:ROUND_MODE, 0x100],
+      [:ROUND_UP, 1],
+      [:ROUND_DOWN, 2],
+      [:ROUND_HALF_UP, 3],
+      [:ROUND_HALF_DOWN, 4],
+      [:ROUND_CEILING, 5],
+      [:ROUND_FLOOR, 6],
+      [:ROUND_HALF_EVEN, 7]
+    ].each do |const, value|
+      it "has a #{const} value" do
+        BigDecimal.const_get(const).should == value
+      end
+    end
+  end
+
+  describe "sign-related constants" do
+    [
+      [:SIGN_NaN, 0],
+      [:SIGN_POSITIVE_ZERO, 1],
+      [:SIGN_NEGATIVE_ZERO, -1],
+      [:SIGN_POSITIVE_FINITE, 2],
+      [:SIGN_NEGATIVE_FINITE, -2],
+      [:SIGN_POSITIVE_INFINITE, 3],
+      [:SIGN_NEGATIVE_INFINITE, -3]
+    ].each do |const, value|
+      it "has a #{const} value" do
+        BigDecimal.const_get(const).should == value
+      end
+    end
+  end
+end