Update to ruby/spec@83063a3

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62094 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 51 insertions, 0 deletions

diff --git a/spec/ruby/core/integer/pow_spec.rb b/spec/ruby/core/integer/pow_spec.rb
new file mode 100644
index 0000000000..5811576d92
--- /dev/null
+++ b/spec/ruby/core/integer/pow_spec.rb
@@ -0,0 +1,51 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+require File.expand_path('../shared/exponent', __FILE__)
+
+ruby_version_is "2.5" do
+  describe "Integer#pow" do
+    context "one argument is passed" do
+      it_behaves_like :integer_exponent, :pow
+    end
+
+    context "two arguments are passed" do
+      it "returns modulo of self raised to the given power" do
+        2.pow(5, 12).should == 8
+        2.pow(6, 13).should == 12
+        2.pow(7, 14).should == 2
+        2.pow(8, 15).should == 1
+      end
+
+      ruby_bug '#13669', '2.5'...'2.5.1' do
+        it "works well with bignums" do
+          2.pow(61, 5843009213693951).should eql 3697379018277258
+          2.pow(62, 5843009213693952).should eql 1551748822859776
+          2.pow(63, 5843009213693953).should eql 3103497645717974
+          2.pow(64, 5843009213693954).should eql  363986077738838
+        end
+      end
+
+      it "handles sign like #divmod does" do
+         2.pow(5,  12).should ==  8
+         2.pow(5, -12).should == -4
+        -2.pow(5,  12).should ==  4
+        -2.pow(5, -12).should == -8
+      end
+
+      it "ensures all arguments are integers" do
+        -> { 2.pow(5, 12.0) }.should raise_error(TypeError, /2nd argument not allowed unless all arguments are integers/)
+        -> { 2.pow(5, Rational(12, 1)) }.should raise_error(TypeError, /2nd argument not allowed unless all arguments are integers/)
+      end
+
+      it "raises TypeError for non-numeric value" do
+        -> { 2.pow(5, "12") }.should raise_error(TypeError)
+        -> { 2.pow(5, []) }.should raise_error(TypeError)
+        -> { 2.pow(5, nil) }.should raise_error(TypeError)
+      end
+
+      it "raises a ZeroDivisionError when the given argument is 0" do
+        -> { 2.pow(5, 0) }.should raise_error(ZeroDivisionError)
+      end
+    end
+  end
+end