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require File.expand_path('../../../spec_helper', __FILE__) describe "Fixnum#[]" do it "returns 1 if the nth bit is set" do 15[1].should == 1 end it "returns 0 if the nth bit is not set" do 8[2].should == 0 end it "returns 0 if the nth bit is greater than the most significant bit" do 2[3].should == 0 end it "returns 0 when passed a negative argument" do 3[-1].should == 0 end it "calls #to_int to convert the argument to an Integer and returns 1 if the nth bit is set" do obj = mock('1') obj.should_receive(:to_int).and_return(1) 2[obj].should == 1 end it "calls #to_int to convert the argument to an Integer and returns 0 if the nth bit is set" do obj = mock('0') obj.should_receive(:to_int).and_return(0) 2[obj].should == 0 end it "accepts a Float argument and returns 0 if the bit at the truncated value is not set" do 13[1.3].should == 0 end it "accepts a Float argument and returns 1 if the bit at the truncated value is set" do 13[2.1].should == 1 end it "raises a TypeError when passed a String" do lambda { 3["3"] }.should raise_error(TypeError) end it "raises a TypeError when #to_int does not return an Integer" do obj = mock('asdf') obj.should_receive(:to_int).and_return("asdf") lambda { 3[obj] }.should raise_error(TypeError) end ruby_bug "#", "1.8.6" do # Fixed at MRI 1.8.7 it "calls #to_int to coerce a String to a Bignum and returns 0" do obj = mock('bignum value') obj.should_receive(:to_int).and_return(bignum_value()) 3[obj].should == 0 end end it "returns 0 when passed a Float in the range of a Bignum" do 3[bignum_value().to_f].should == 0 end end
Version data entries
52 entries across 52 versions & 2 rubygems