require File.expand_path('../spec_helper', __FILE__) load_extension("range") describe "C-API Range function" do before :each do @s = CApiRangeSpecs.new end describe "rb_range_new" do it "constructs a range using the given start and end" do range = @s.rb_range_new('a', 'c') range.should == ('a'..'c') range.first.should == 'a' range.last.should == 'c' end it "includes the end object when the third parameter is omitted or false" do @s.rb_range_new('a', 'c').to_a.should == ['a', 'b', 'c'] @s.rb_range_new(1, 3).to_a.should == [1, 2, 3] @s.rb_range_new('a', 'c', false).to_a.should == ['a', 'b', 'c'] @s.rb_range_new(1, 3, false).to_a.should == [1, 2, 3] @s.rb_range_new('a', 'c', true).to_a.should == ['a', 'b'] @s.rb_range_new(1, 3, 1).to_a.should == [1, 2] @s.rb_range_new(1, 3, mock('[1,2]')).to_a.should == [1, 2] @s.rb_range_new(1, 3, :test).to_a.should == [1, 2] end it "raises an ArgumentError when the given start and end can't be compared by using #<=>" do lambda { @s.rb_range_new(1, mock('x')) }.should raise_error(ArgumentError) lambda { @s.rb_range_new(mock('x'), mock('y')) }.should raise_error(ArgumentError) end end describe "rb_range_values" do it "stores the range properties" do beg, fin, excl = @s.rb_range_values(10..20) beg.should == 10 fin.should == 20 excl.should be_false end it "stores the range properties of non-Range object" do range_like = mock('range') def range_like.begin 10 end def range_like.end 20 end def range_like.exclude_end? false end beg, fin, excl = @s.rb_range_values(range_like) beg.should == 10 fin.should == 20 excl.should be_false end end describe "rb_range_beg_len" do it "returns correct begin, length and result" do r = 2..5 begp, lenp, result = @s.rb_range_beg_len(r, 0, 0, 10, 0) result.should be_true begp.should == 2 lenp.should == 4 end it "returns nil when not in range" do r = 2..5 begp, lenp, result = @s.rb_range_beg_len(r, 0, 0, 1, 0) result.should be_nil end it "raises a RangeError when not in range and err is 1" do r = -5..-1 lambda { @s.rb_range_beg_len(r, 0, 0, 1, 1) }.should raise_error(RangeError) end it "returns nil when not in range and err is 0" do r = -5..-1 begp, lenp, result = @s.rb_range_beg_len(r, 0, 0, 1, 0) result.should be_nil end end end