1 files changed, 27 insertions, 0 deletions
diff --git a/spec/ruby/core/fixnum/multiply_spec.rb b/spec/ruby/core/fixnum/multiply_spec.rb
new file mode 100644
index 0000000000..2eabd7b632
--- /dev/null
+++ b/spec/ruby/core/fixnum/multiply_spec.rb
@@ -0,0 +1,27 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Fixnum#*" do
+  it "returns self multiplied by the given Integer" do
+    (4923 * 2).should == 9846
+    (1342177 * 800).should == 1073741600
+    (65536 * 65536).should == 4294967296
+
+    (256 * bignum_value).should == 2361183241434822606848
+    (6712 * 0.25).should == 1678.0
+  end
+
+  it "raises a TypeError when given a non-Integer" do
+    lambda {
+      (obj = mock('10')).should_receive(:to_int).any_number_of_times.and_return(10)
+      13 * obj
+    }.should raise_error(TypeError)
+    lambda { 13 * "10"    }.should raise_error(TypeError)
+    lambda { 13 * :symbol }.should raise_error(TypeError)
+  end
+
+  it "overflows to Bignum when the result does not fit in Fixnum" do
+    (fixnum_max * fixnum_max).should be_kind_of(Bignum)
+    (fixnum_max * fixnum_min).should be_kind_of(Bignum)
+  end
+
+end