1 files changed, 47 insertions, 0 deletions
diff --git a/spec/ruby/library/bigdecimal/sign_spec.rb b/spec/ruby/library/bigdecimal/sign_spec.rb
new file mode 100644
index 0000000000..0d722987b5
--- /dev/null
+++ b/spec/ruby/library/bigdecimal/sign_spec.rb
@@ -0,0 +1,47 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require 'bigdecimal'
+
+describe "BigDecimal#sign" do
+
+  it "defines several constants for signs" do
+    # are these really correct?
+    BigDecimal::SIGN_POSITIVE_INFINITE.should == 3
+    BigDecimal::SIGN_NEGATIVE_INFINITE.should == -3
+    BigDecimal::SIGN_POSITIVE_ZERO.should == 1
+    BigDecimal::SIGN_NEGATIVE_ZERO.should == -1
+    BigDecimal::SIGN_POSITIVE_FINITE.should == 2
+    BigDecimal::SIGN_NEGATIVE_FINITE.should == -2
+  end
+
+  it "returns positive value if BigDecimal greater than 0" do
+    BigDecimal("1").sign.should == BigDecimal::SIGN_POSITIVE_FINITE
+    BigDecimal("1E-20000000").sign.should == BigDecimal::SIGN_POSITIVE_FINITE
+    BigDecimal("1E200000000").sign.should == BigDecimal::SIGN_POSITIVE_FINITE
+    BigDecimal("Infinity").sign.should == BigDecimal::SIGN_POSITIVE_INFINITE
+  end
+
+  it "returns negative value if BigDecimal less than 0" do
+    BigDecimal("-1").sign.should == BigDecimal::SIGN_NEGATIVE_FINITE
+    BigDecimal("-1E-9990000").sign.should == BigDecimal::SIGN_NEGATIVE_FINITE
+    BigDecimal("-1E20000000").sign.should == BigDecimal::SIGN_NEGATIVE_FINITE
+    BigDecimal("-Infinity").sign.should == BigDecimal::SIGN_NEGATIVE_INFINITE
+  end
+
+  it "returns positive zero if BigDecimal equals positve zero" do
+    BigDecimal("0").sign.should == BigDecimal::SIGN_POSITIVE_ZERO
+    BigDecimal("0E-200000000").sign.should == BigDecimal::SIGN_POSITIVE_ZERO
+    BigDecimal("0E200000000").sign.should == BigDecimal::SIGN_POSITIVE_ZERO
+  end
+
+  it "returns negative zero if BigDecimal equals negative zero" do
+    BigDecimal("-0").sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
+    BigDecimal("-0E-200000000").sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
+    BigDecimal("-0E200000000").sign.should == BigDecimal::SIGN_NEGATIVE_ZERO
+  end
+
+  it "returns BigDecimal::SIGN_NaN if BigDecimal is NaN" do
+    BigDecimal("NaN").sign.should == BigDecimal::SIGN_NaN
+  end
+
+end
+