1
0
Fork 0
mirror of https://github.com/ruby/ruby.git synced 2022-11-09 12:17:21 -05:00
ruby--ruby/spec/ruby/core/range/max_spec.rb

83 lines
2.5 KiB
Ruby
Raw Normal View History

require File.expand_path('../../../spec_helper', __FILE__)
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