1 files changed, 63 insertions, 0 deletions
diff --git a/spec/ruby/library/bigdecimal/equal_value_spec.rb b/spec/ruby/library/bigdecimal/equal_value_spec.rb
new file mode 100644
index 0000000000..d1133765b1
--- /dev/null
+++ b/spec/ruby/library/bigdecimal/equal_value_spec.rb
@@ -0,0 +1,63 @@
+require_relative '../../spec_helper'
+require 'bigdecimal'
+
+
+describe "BigDecimal#==" do
+  before :each do
+    @bg6543_21 = BigDecimal("6543.21")
+    @bg5667_19 = BigDecimal("5667.19")
+    @a = BigDecimal("1.0000000000000000000000000000000000000000005")
+    @b = BigDecimal("1.00000000000000000000000000000000000000000005")
+    @bigint = BigDecimal("1000.0")
+    @nan = BigDecimal("NaN")
+    @infinity = BigDecimal("Infinity")
+    @infinity_minus = BigDecimal("-Infinity")
+  end
+
+  it "tests for equality" do
+    (@bg6543_21 == @bg6543_21).should == true
+    (@a == @a).should == true
+    (@a == @b).should == false
+    (@bg6543_21 == @a).should == false
+    (@bigint == 1000).should == true
+  end
+
+  it "returns false for NaN as it is never equal to any number" do
+    (@nan == @nan).should == false
+    (@a == @nan).should == false
+    (@nan == @a).should == false
+    (@nan == @infinity).should == false
+    (@nan == @infinity_minus).should == false
+    (@infinity == @nan).should == false
+    (@infinity_minus == @nan).should == false
+  end
+
+  it "returns true for infinity values with the same sign" do
+    (@infinity == @infinity).should == true
+    (@infinity == BigDecimal("Infinity")).should == true
+    (BigDecimal("Infinity") == @infinity).should == true
+
+    (@infinity_minus == @infinity_minus).should == true
+    (@infinity_minus == BigDecimal("-Infinity")).should == true
+    (BigDecimal("-Infinity") == @infinity_minus).should == true
+  end
+
+  it "returns false for infinity values with different signs" do
+    (@infinity == @infinity_minus).should == false
+    (@infinity_minus == @infinity).should == false
+  end
+
+  it "returns false when infinite value compared to finite one" do
+    (@infinity == @a).should == false
+    (@infinity_minus == @a).should == false
+
+    (@a == @infinity).should == false
+    (@a == @infinity_minus).should == false
+  end
+
+  it "returns false when compared objects that can not be coerced into BigDecimal" do
+    (@infinity == nil).should == false
+    (@bigint == nil).should == false
+    (@nan == nil).should == false
+  end
+end