diff options
Diffstat (limited to 'spec/ruby/core/bignum/element_reference_spec.rb')
-rw-r--r-- | spec/ruby/core/bignum/element_reference_spec.rb | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/spec/ruby/core/bignum/element_reference_spec.rb b/spec/ruby/core/bignum/element_reference_spec.rb new file mode 100644 index 0000000000..e5ee9e15ac --- /dev/null +++ b/spec/ruby/core/bignum/element_reference_spec.rb @@ -0,0 +1,30 @@ +require File.expand_path('../../../spec_helper', __FILE__) + +describe "Bignum#[]" do + before :each do + @bignum = bignum_value(4996) + end + + it "returns the nth bit in the binary representation of self" do + @bignum[2].should == 1 + @bignum[9.2].should == 1 + @bignum[21].should == 0 + @bignum[0xffffffff].should == 0 + @bignum[-0xffffffff].should == 0 + end + + it "tries to convert the given argument to an Integer using #to_int" do + @bignum[1.3].should == @bignum[1] + + (obj = mock('2')).should_receive(:to_int).at_least(1).and_return(2) + @bignum[obj].should == 1 + end + + it "raises a TypeError when the given argument can't be converted to Integer" do + obj = mock('asdf') + lambda { @bignum[obj] }.should raise_error(TypeError) + + obj.should_receive(:to_int).and_return("asdf") + lambda { @bignum[obj] }.should raise_error(TypeError) + end +end |