1 files changed, 27 insertions, 0 deletions
diff --git a/spec/ruby/library/bigdecimal/exponent_spec.rb b/spec/ruby/library/bigdecimal/exponent_spec.rb
new file mode 100644
index 0000000000..8877147955
--- /dev/null
+++ b/spec/ruby/library/bigdecimal/exponent_spec.rb
@@ -0,0 +1,27 @@
+require_relative '../../spec_helper'
+require_relative 'shared/power'
+require 'bigdecimal'
+
+describe "BigDecimal#**" do
+  it_behaves_like :bigdecimal_power, :**
+end
+
+describe "BigDecimal#exponent" do
+
+  it "returns an Integer" do
+    BigDecimal("2E100000000").exponent.kind_of?(Integer).should == true
+    BigDecimal("2E-999").exponent.kind_of?(Integer).should == true
+  end
+
+  it "is n if number can be represented as 0.xxx*10**n" do
+    BigDecimal("2E1000").exponent.should == 1001
+    BigDecimal("1234567E10").exponent.should == 17
+  end
+
+  it "returns 0 if self is 0" do
+    BigDecimal("0").exponent.should == 0
+    BigDecimal("+0").exponent.should == 0
+    BigDecimal("-0").exponent.should == 0
+  end
+
+end