1 files changed, 43 insertions, 0 deletions
diff --git a/spec/ruby/shared/rational/modulo.rb b/spec/ruby/shared/rational/modulo.rb
new file mode 100644
index 0000000000..ca69650f20
--- /dev/null
+++ b/spec/ruby/shared/rational/modulo.rb
@@ -0,0 +1,43 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe :rational_modulo, shared: true do
+  it "returns the remainder when this value is divided by other" do
+    Rational(2, 3).send(@method, Rational(2, 3)).should == Rational(0, 1)
+    Rational(4, 3).send(@method, Rational(2, 3)).should == Rational(0, 1)
+    Rational(2, -3).send(@method, Rational(-2, 3)).should == Rational(0, 1)
+    Rational(0, -1).send(@method, -1).should == Rational(0, 1)
+
+    Rational(7, 4).send(@method, Rational(1, 2)).should == Rational(1, 4)
+    Rational(7, 4).send(@method, 1).should == Rational(3, 4)
+    Rational(7, 4).send(@method, Rational(1, 7)).should == Rational(1, 28)
+
+    Rational(3, 4).send(@method, -1).should == Rational(-1, 4)
+    Rational(1, -5).send(@method, -1).should == Rational(-1, 5)
+  end
+
+  it "returns a Float value when the argument is Float" do
+    Rational(7, 4).send(@method, 1.0).should be_kind_of(Float)
+    Rational(7, 4).send(@method, 1.0).should == 0.75
+    Rational(7, 4).send(@method, 0.26).should be_close(0.19, 0.0001)
+  end
+
+  it "raises ZeroDivisionError on zero denominator" do
+    lambda {
+      Rational(3, 5).send(@method, Rational(0, 1))
+    }.should raise_error(ZeroDivisionError)
+
+    lambda {
+      Rational(0, 1).send(@method, Rational(0, 1))
+    }.should raise_error(ZeroDivisionError)
+
+    lambda {
+      Rational(3, 5).send(@method, 0)
+    }.should raise_error(ZeroDivisionError)
+  end
+
+  it "raises a ZeroDivisionError when the argument is 0.0" do
+    lambda {
+      Rational(3, 5).send(@method, 0.0)
+    }.should raise_error(ZeroDivisionError)
+  end
+end