1 files changed, 50 insertions, 0 deletions
diff --git a/spec/ruby/library/bigdecimal/abs_spec.rb b/spec/ruby/library/bigdecimal/abs_spec.rb
new file mode 100644
index 0000000000..9027abfb47
--- /dev/null
+++ b/spec/ruby/library/bigdecimal/abs_spec.rb
@@ -0,0 +1,50 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require 'bigdecimal'
+
+describe "BigDecimal#abs" do
+  before :each do
+    @one = BigDecimal("1")
+    @zero = BigDecimal("0")
+    @zero_pos = BigDecimal("+0")
+    @zero_neg = BigDecimal("-0")
+    @two = BigDecimal("2")
+    @three = BigDecimal("3")
+    @mixed = BigDecimal("1.23456789")
+    @nan = BigDecimal("NaN")
+    @infinity = BigDecimal("Infinity")
+    @infinity_minus = BigDecimal("-Infinity")
+    @one_minus = BigDecimal("-1")
+    @frac_1 = BigDecimal("1E-99999")
+    @frac_2 = BigDecimal("0.9E-99999")
+  end
+
+  it "returns the absolute value" do
+    pos_int = BigDecimal("2E5555")
+    neg_int = BigDecimal("-2E5555")
+    pos_frac = BigDecimal("2E-9999")
+    neg_frac = BigDecimal("-2E-9999")
+
+    pos_int.abs.should == pos_int
+    neg_int.abs.should == pos_int
+    pos_frac.abs.should == pos_frac
+    neg_frac.abs.should == pos_frac
+    @one.abs.should == 1
+    @two.abs.should == 2
+    @three.abs.should == 3
+    @mixed.abs.should == @mixed
+    @one_minus.abs.should == @one
+  end
+
+  it "properly handles special values" do
+    @infinity.abs.should == @infinity
+    @infinity_minus.abs.should == @infinity
+    @nan.abs.nan?.should == true # have to do it this way, since == doesn't work on NaN
+    @zero.abs.should == 0
+    @zero.abs.sign.should == BigDecimal::SIGN_POSITIVE_ZERO
+    @zero_pos.abs.should == 0
+    @zero_pos.abs.sign.should == BigDecimal::SIGN_POSITIVE_ZERO
+    @zero_neg.abs.should == 0
+    @zero_neg.abs.sign.should == BigDecimal::SIGN_POSITIVE_ZERO
+  end
+
+end