2 files changed, 46 insertions, 0 deletions
diff --git a/spec/ruby/library/mathn/math/shared/rsqrt.rb b/spec/ruby/library/mathn/math/shared/rsqrt.rb
new file mode 100644
index 0000000000..68e2f7d02f
--- /dev/null
+++ b/spec/ruby/library/mathn/math/shared/rsqrt.rb
@@ -0,0 +1,21 @@
+require 'mathn'
+require File.expand_path('../../fixtures/classes', __FILE__)
+
+describe :mathn_math_rsqrt, shared: true do
+  it "returns the square root for Rational numbers" do
+    @object.send(:rsqrt, Rational(9, 25)).should == Rational(3, 5)
+    @object.send(:rsqrt, 16/64).should == Rational(1, 2)
+  end
+
+  it "returns the square root for positive numbers" do
+    @object.send(:rsqrt, 1).should == 1
+    @object.send(:rsqrt, 4.0).should == 2.0
+    @object.send(:rsqrt, 12.34).should == Math.sqrt!(12.34)
+  end
+
+  it "raises an Math::DomainError if the argument is a negative number" do
+    lambda { @object.send(:rsqrt, -1) }.should raise_error(Math::DomainError)
+    lambda { @object.send(:rsqrt, -4.0) }.should raise_error(Math::DomainError)
+    lambda { @object.send(:rsqrt, -16/64) }.should raise_error(Math::DomainError)
+  end
+end
diff --git a/spec/ruby/library/mathn/math/shared/sqrt.rb b/spec/ruby/library/mathn/math/shared/sqrt.rb
new file mode 100644
index 0000000000..6aab25fc5d
--- /dev/null
+++ b/spec/ruby/library/mathn/math/shared/sqrt.rb
@@ -0,0 +1,25 @@
+require 'mathn'
+require File.expand_path('../../fixtures/classes', __FILE__)
+
+describe :mathn_math_sqrt, shared: true do
+  it "returns the square root for Rational numbers" do
+    @object.send(:sqrt, Rational(9, 25)).should == Rational(3, 5)
+    @object.send(:sqrt, 16/64).should == Rational(1, 2)
+  end
+
+  it "returns the square root for Complex numbers" do
+    @object.send(:sqrt, Complex(1, 0)).should == 1
+  end
+
+  it "returns the square root for positive numbers" do
+    @object.send(:sqrt, 1).should == 1
+    @object.send(:sqrt, 4.0).should == 2.0
+    @object.send(:sqrt, 12.34).should == Math.sqrt!(12.34)
+  end
+
+  it "returns the square root for negative numbers" do
+    @object.send(:sqrt, -9).should == Complex(0, 3)
+    @object.send(:sqrt, -5.29).should == Complex(0, 2.3)
+    @object.send(:sqrt, -16/64).should == Complex(0, 1/2)
+  end
+end