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Diffstat (limited to 'spec/ruby/core/integer/allbits_spec.rb')
-rw-r--r-- | spec/ruby/core/integer/allbits_spec.rb | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/spec/ruby/core/integer/allbits_spec.rb b/spec/ruby/core/integer/allbits_spec.rb new file mode 100644 index 0000000000..54c99265ba --- /dev/null +++ b/spec/ruby/core/integer/allbits_spec.rb @@ -0,0 +1,37 @@ +require File.expand_path('../../../spec_helper', __FILE__) + +describe "Integer#allbits?" do + it "returns true iff all the bits of the argument are set in the receiver" do + 42.allbits?(42).should == true + 0b1010_1010.allbits?(0b1000_0010).should == true + 0b1010_1010.allbits?(0b1000_0001).should == false + 0b1000_0010.allbits?(0b1010_1010).should == false + (0b1010_1010 | bignum_value).allbits?(0b1000_0010 | bignum_value).should == true + (0b1010_1010 | bignum_value).allbits?(0b1000_0001 | bignum_value).should == false + (0b1000_0010 | bignum_value).allbits?(0b1010_1010 | bignum_value).should == false + end + + it "handles negative values using two's complement notation" do + (~0b1).allbits?(42).should == true + (-42).allbits?(-42).should == true + (~0b1010_1010).allbits?(~0b1110_1011).should == true + (~0b1010_1010).allbits?(~0b1000_0010).should == false + (~(0b1010_1010 | bignum_value)).allbits?(~(0b1110_1011 | bignum_value)).should == true + (~(0b1010_1010 | bignum_value)).allbits?(~(0b1000_0010 | bignum_value)).should == false + end + + it "coerces the rhs using to_int" do + obj = mock("the int 0b10") + obj.should_receive(:to_int).and_return(0b10) + 0b110.allbits?(obj).should == true + end + + it "raises a TypeError when given a non-Integer" do + lambda { + (obj = mock('10')).should_receive(:coerce).any_number_of_times.and_return([42,10]) + 13.allbits?(obj) + }.should raise_error(TypeError) + lambda { 13.allbits?("10") }.should raise_error(TypeError) + lambda { 13.allbits?(:symbol) }.should raise_error(TypeError) + end +end |