diff options
Diffstat (limited to 'spec/ruby/core/bignum/minus_spec.rb')
-rw-r--r-- | spec/ruby/core/bignum/minus_spec.rb | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/spec/ruby/core/bignum/minus_spec.rb b/spec/ruby/core/bignum/minus_spec.rb new file mode 100644 index 0000000000..754ef7fa42 --- /dev/null +++ b/spec/ruby/core/bignum/minus_spec.rb @@ -0,0 +1,19 @@ +require File.expand_path('../../../spec_helper', __FILE__) + +describe "Bignum#-" do + before :each do + @bignum = bignum_value(314) + end + + it "returns self minus the given Integer" do + (@bignum - 9).should == 9223372036854776113 + (@bignum - 12.57).should be_close(9223372036854776109.43, TOLERANCE) + (@bignum - bignum_value(42)).should == 272 + end + + it "raises a TypeError when given a non-Integer" do + lambda { @bignum - mock('10') }.should raise_error(TypeError) + lambda { @bignum - "10" }.should raise_error(TypeError) + lambda { @bignum - :symbol }.should raise_error(TypeError) + end +end |