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-rw-r--r--spec/ruby/library/bigdecimal/minus_spec.rb8
1 files changed, 8 insertions, 0 deletions
diff --git a/spec/ruby/library/bigdecimal/minus_spec.rb b/spec/ruby/library/bigdecimal/minus_spec.rb
index 02f7f02296..267a0f7eab 100644
--- a/spec/ruby/library/bigdecimal/minus_spec.rb
+++ b/spec/ruby/library/bigdecimal/minus_spec.rb
@@ -55,4 +55,12 @@ describe "BigDecimal#-" do
(@one_minus - @infinity).should == @infinity_minus
end
+ describe "with Object" do
+ it "tries to coerce the other operand to self" do
+ object = mock("Object")
+ object.should_receive(:coerce).with(@one).and_return([@one, BigDecimal("42")])
+ (@one - object).should == BigDecimal("-41")
+ end
+ end
+
end