1 files changed, 29 insertions, 0 deletions
diff --git a/spec/ruby/core/bignum/shared/modulo.rb b/spec/ruby/core/bignum/shared/modulo.rb
new file mode 100644
index 0000000000..9814e22f3b
--- /dev/null
+++ b/spec/ruby/core/bignum/shared/modulo.rb
@@ -0,0 +1,29 @@
+describe :bignum_modulo, shared: true do
+  before :each do
+    @bignum = bignum_value
+  end
+
+  it "returns the modulus obtained from dividing self by the given argument" do
+    @bignum.send(@method, 5).should == 3
+    @bignum.send(@method, -5).should == -2
+    @bignum.send(@method, -100).should == -92
+    @bignum.send(@method, 2.22).should be_close(0.780180180180252, TOLERANCE)
+    @bignum.send(@method, bignum_value(10)).should == 9223372036854775808
+  end
+
+  it "raises a ZeroDivisionError when the given argument is 0" do
+    lambda { @bignum.send(@method, 0) }.should raise_error(ZeroDivisionError)
+    lambda { (-@bignum).send(@method, 0) }.should raise_error(ZeroDivisionError)
+  end
+
+  it "raises a ZeroDivisionError when the given argument is 0 and a Float" do
+    lambda { @bignum.send(@method, 0.0) }.should raise_error(ZeroDivisionError)
+    lambda { -@bignum.send(@method, 0.0) }.should raise_error(ZeroDivisionError)
+  end
+
+  it "raises a TypeError when given a non-Integer" do
+    lambda { @bignum.send(@method, mock('10')) }.should raise_error(TypeError)
+    lambda { @bignum.send(@method, "10") }.should raise_error(TypeError)
+    lambda { @bignum.send(@method, :symbol) }.should raise_error(TypeError)
+  end
+end