require_relative '../../spec_helper' describe "Range#max" do it "returns the maximum value in the range when called with no arguments" do (1..10).max.should == 10 (1...10).max.should == 9 (0...2**64).max.should == 18446744073709551615 ('f'..'l').max.should == 'l' ('a'...'f').max.should == 'e' end it "returns the maximum value in the Float range when called with no arguments" do (303.20..908.1111).max.should == 908.1111 end it "raises TypeError when called on an exclusive range and a non Integer value" do lambda { (303.20...908.1111).max }.should raise_error(TypeError) end it "returns nil when the endpoint is less than the start point" do (100..10).max.should be_nil ('z'..'l').max.should be_nil end it "returns nil when the endpoint equals the start point and the range is exclusive" do (5...5).max.should be_nil end it "returns the endpoint when the endpoint equals the start point and the range is inclusive" do (5..5).max.should equal(5) end it "returns nil when the endpoint is less than the start point in a Float range" do (3003.20..908.1111).max.should be_nil end it "returns end point when the range is Time..Time(included end point)" do time_start = Time.now time_end = Time.now + 1.0 (time_start..time_end).max.should equal(time_end) end it "raises TypeError when called on a Time...Time(excluded end point)" do time_start = Time.now time_end = Time.now + 1.0 lambda { (time_start...time_end).max }.should raise_error(TypeError) end end describe "Range#max given a block" do it "passes each pair of values in the range to the block" do acc = [] (1..10).max {|a,b| acc << [a,b]; a } acc.flatten! (1..10).each do |value| acc.include?(value).should be_true end end it "passes each pair of elements to the block in reversed order" do acc = [] (1..5).max {|a,b| acc << [a,b]; a } acc.should == [[2,1],[3,2], [4,3], [5, 4]] end it "calls #> and #< on the return value of the block" do obj = mock('obj') obj.should_receive(:>).exactly(2).times obj.should_receive(:<).exactly(2).times (1..3).max {|a,b| obj } end it "returns the element the block determines to be the maximum" do (1..3).max {|a,b| -3 }.should == 1 end it "returns nil when the endpoint is less than the start point" do (100..10).max {|x,y| x <=> y}.should be_nil ('z'..'l').max {|x,y| x <=> y}.should be_nil (5...5).max {|x,y| x <=> y}.should be_nil end end